DEPARTMENT OF LABOR AND ECONOMIC GROWTH

                          PUBLIC SERVICE COMMISSION

                    TECHNICAL STANDARDS FOR ELECTRIC SERVICE


(By authority conferred on the public service commission by section 7 of 1909 
PA 106, section 5 of 1919 PA 419, and sections 4 and 6 of  1939  PA  3,   MCL 
460.557, 460.55, 460.4, and 460.6.)


                        PART 1. GENERAL PROVISIONS


R 460.3101   Applicability; purpose; modification; adoption  of  rules    and 
regulations by utility.
  Rule 101. (1) These rules  apply  to  electric   utilities   that   operate 
within the state of Michigan under the jurisdiction of  the  public   service 
commission.
  (2) These rules are intended to promote safe and adequate  service  to  the 
public and to provide standards for uniform and   reasonable   practices   by 
utilities.
  (3) These rules do not relieve a utility from any of   its   duties   under 
the laws of this state.
  (4) Each utility may adopt reasonable rules   and   regulations   governing 
its relations with customers which it finds necessary and   which   are   not 
inconsistent with these rules for  electric  service.   Adopted   rules   and 
regulations shall be filed with, and approved by, the commission.

  History:  1983 AACS; 1996 AACS.


R 460.3102   Definitions.
  Rule 102. As used in these rules:
  (a) "Acceptable to the commission" means that a commission order has   been 
obtained.
  (b) "Approved by the commission" means that a commission  order  has   been 
obtained.
  (c) "Commission" means the Michigan public service commission.
  (d) "Customer," except as used in R  460.3411,  means  any  person,   firm, 
association, or corporation, or any agency of the federal, state, county,  or 
municipal government that purchases electric service supplied by a utility.
  (e) "Electric plant" means all real estate, fixtures, or property that   is 
owned, controlled, operated, or managed in connection with, or to  facilitate 
the production, transmission, and delivery of, electric energy.
  (f) "File" means to deliver to the commission's executive secretary.
  (g) "Meter," unless otherwise qualified, means a device that measures   and 
registers the integral of an electrical quantity with respect to time.
  (h) "Metering error" means a failure to accurately measure and record   all 
of the electrical quantities that are required  by  the  applicable  rate  or 
rates.
  (i) "Meter shop" means a shop where meters are  inspected,  repaired,   and 
tested. A meter shop may be at a fixed location or may be mobile.
  (j) "Premises" means an undivided piece of land that is not  separated   by 
public roads, streets, or alleys.
  (k)  "Submit"  means   to   deliver   to   the   commission's    designated 
representative.
  (l) "Utility" means an electric company, whether  private,  corporate,   or 
cooperative, that operates under the jurisdiction of the commission.

  History:  1983 AACS; 1996 AACS; 2008 AACS.



R 460.3103   Rescission.
  Rule 103. R 460.501 to R 460.505 of the   Michigan   Administrative   Code, 
appearing on pages 4695 to 4709 of the 1979  Michigan  Administrative   Code, 
are rescinded.

  History:  1983 AACS.


                        PART 2. RECORDS AND REPORTS

R  460.3201   Records; location; examination.
  Rule  201.  Upon  a  request  by  the  commission   or    its    designated 
representative, records which are required by these  rules   or   which   are 
necessary for the administration of these rules shall  be  available   within 
the state of Michigan for examination by the commission  or  its   designated 
representative.

  History:  1983 AACS; 1996 AACS.


R  460.3202   Records; preservation.
  Rule 202. Unless otherwise specified in these rules, or by  other  order of 
the commission, all records that are  required  by  these  rules   shall   be 
preserved for the period of time specified in R 460.2501  et   seq.  of   the 
Michigan Administrative Code.

  History:  1983 AACS.


R  460.3203   Documents and information; required submission.
  Rule 203. A utility shall submit all  of  the   following   documents   and 
information and shall maintain the documents and information  in  a   current 
status:
  (a) A copy of the utility's tariff.
  (b) A copy of the utility's rules and standards that are made  available to 
the public covering meter and service installation.
  (c) A copy of each type of customer bill form.
  (d) A list of the cities,  villages,  and  townships   that   the   utility 
serves. Upon a request by the commission or  its  designated  representative, 
the  utility  shall  also  provide  copies  of   the   associated   franchise 
information.
  (e) The name, title, address, and telephone number of the  persons  to   be 
contacted in connection with the following matters:
  (i) General management duties.
  (ii) Customer relations (complaints).
  (iii) Engineering operations.
  (iv) Meter tests and repairs.
  (v) Emergencies during non-office hours.
  (f) An annual copy of the utility's construction budget,  which  shall   be 
updated for all major changes to generating and  transmission  facilities.
  (g) An "Electric Service" monthly  report,  on  forms   suitable   to   the 
commission, that shows information concerning   the   utility's   acquisition 
and disposition of electric energy and other information  as  required.   The 
reports shall be submitted by  investor-owned  utilities   within   50   days 
after the end of the quarter reported and by  rural   electric   cooperatives 
within 50 days after the end of the month reported.
  (h) A map or maps that show the utility's  operating   area   within   this 
state, including generating stations and  transmission   lines   with   their 
voltage designations. Upon a request by the commission  or   its   designated 
representative, the utility shall also make available a map  or   maps   that 
show all of the following:
  (i) Distribution lines with the number of phases designated.
  (ii) State boundary crossings.
  (iii) Service areas.

  History:  1983 AACS; 1996 AACS.


R 460.3204   Customer records; retention period; content.
  Rule 204. (1) The utility shall retain records as necessary to comply  with 
R 460.3309. The records shall be retained for not less than 3 years.
  (2) Records for customers shall show, if applicable, all of the   following 
information:
  (a) Kilowatt-hour meter reading.
  (b) Kilowatt-hour consumption.
  (c) Kilowatt, kilovolt ampere, and kilovar meter reading.
  (d) Kilowatt, kilovolt ampere, and kilovar measured demand.
  (e) Kilowatt, kilovolt ampere, and kilovar billing demand.
  (f) Total amount of bill.

  History:  1983 AACS; 1996 AACS; 2008 AACS.



                        PART 3. METER REQUIREMENTS


R 460.3301   Metered measurement of electricity required; exceptions.
  Rule 301. (1) All electricity that is sold by a utility shall  be  on   the 
basis of meter measurement, except where the consumption   can   be   readily 
computed or except as provided for in a utility's filed rates.
  (2) Where practicable, the consumption of electricity within the utility or 
by administrative units associated with the utility shall  be  metered.
  (3) Meters shall be in compliance with part 6 of these rules.

  History:  1983 AACS; 1996 AACS.


R 460.3302   Rescinded.

  History:  1983 AACS; 1996 AACS.



R 460.3303   Meter reading data.
  Rule 303. The meter reading data shall  include  all   of   the   following 
information:
  (a) A suitable designation identifying the customer.
  (b) Identifying number or description of the meter, or both.
  (c) Meter readings or, if a reading was not taken, an  indication  that   a 
reading was not taken.
  (d) Any applicable multiplier or constant.

  History:  1983 AACS; 1996 AACS.


R 460.3304   Meter data collection system.
  Rule 304. A meter data collection system that takes  data  from   recording 
meters shall indicate all of the following:
  (a) The date of the record.
  (b) The equipment numbers.
  (c) A suitable designation identifying the customer.
  (d) The appropriate multipliers.

  History:  1983 AACS; 1996 AACS.


R 460.3305   Meter multiplier.
  Rule 305. If it  is  necessary  to  apply  a  multiplier   to   the   meter 
registration, then the multiplier shall be displayed on the   face   of   the 
meter.

  History:  1983 AACS; 1996 AACS.


R 460.3306   Rescinded.

  History:  1983 AACS; 1996 AACS; 2008 AACS.


R  460.3307   Rescinded.

  History:  1983 AACS; 1996 AACS.


R 460.3308   Standards of good practice; adoption by reference.
  Rule 308. In the absence of specific rules of the  commission,  a   utility 
shall apply the provisions of the publications set  forth  in  this  rule  as 
standards of accepted good practice.  The following standards  are  available 
from the American National Standards Institute (ANSI), Customer  Service,  25 
West 43rd St., 4th floor, New York, New York, 10036, USA,  telephone  number:
1-212-642-4900      or      via      the      internet      at      web-site:
http://webstore.ansi.org/ansidocstore/; at the cost listed below  as  of  the 
time of adoption of these rules, plus a handling charge (for paper copies):
  (a) American National Standards Institute standards for electricity  meters 
ANSI C12.1-2001 and C12.20-2002.  Cost $120.00.
  (b) American National Standards  Institute/American  Society  for   Quality 
Sampling Procedures and  Tables  for  Inspection  by  Variables  for  Percent 
Nonconforming (ANSI/ASQ Z1.9-2003).  Cost $100.00.
  (c) American National Standards Institute IEEE Standard  Requirements   for 
Instrument Transformers (ANSI C57.13-1993).  Cost $110.00.
  (d) American National Standards Institute IEEE Standard for High   Accuracy 
Instrument Transformers, IEEE Std. C57.13.6-2005.  Cost $35.00.
  (e) The standards adopted in subdivisions (a) to (d) of this rule are  also 
available for inspection at the  Michigan  Public  Service  Commission,  6545 
Mercantile Way, P.O. Box 30221, Lansing, Michigan, 48909.   Copies  of  these 
standards may also be obtained from the MPSC at the  cost  charged  by  ANSI, 
plus $20.00 for shipping and handling.

  History:  1996 AACS; 2008 AACS.


R 460.3309   Metering inaccuracies; billing adjustments.
  Rule 309. (1) An adjustment  of  bills  for  service  for  the  period   of 
inaccuracy shall be made for over registration and  may  be  made  for  under 
registration under any of the following conditions:
  (a) If a meter creeps.
  (b) If a metering installation is found upon any test to have  an   average 
inaccuracy of more than 2.0%.
  (c) If a demand metering installation is found upon any test  to  have   an 
average inaccuracy of more than 1.0% in addition to the inaccuracies  allowed 
under R 460.3609.
  (d) If a meter registration  has  been  found  to  be  inaccurate  due   to 
apparent tampering by a person or persons known or unknown.
  (2) The amount of the  adjustment  of  the  bills  for  service  shall   be 
calculated on the basis that the metering equipment  is  100%  accurate  with 
respect to the testing equipment used to make the test. The average  accuracy 
of watt-hour meters shall be calculated in accordance with R 460.3616.
  (3) If  the  date  when  the  inaccuracy  in  registration  began  can   be 
determined, then that date shall be the starting point  for  determining  the 
amount of the adjustment and shall be subject to subrule (12) of this rule.
  (4) If the date when  the  inaccuracy  in  registration  began  cannot   be 
determined, then it is assumed that the inaccuracy existed for the period  of 
time immediately preceding discovery of the inaccuracy that is equal  to  1/2 
of the time since the meter was installed on the present premises, 1/2 of the 
time since the last test, or 6 years, whichever is  the  shortest  period  of 
time, except as otherwise provided in subrule (5) of this rule and subject to 
subrule (12) of this rule.
  (5) The inaccuracy in registration due to creep  shall  be  calculated   by 
timing the rate of creeping  under  R  460.3607  and  by  assuming  that  the 
creeping affected the registration of  the  meter  for  the  period  of  time 
immediately preceding discovery of the inaccuracy that is equal to 1/4 of the 
time since the meter was installed on the present premises, 1/4 of  the  time 
since the last test, or 6 years, whichever is the shortest  period  of  time, 
subject to subrule (12) of this rule.
  (6) If the average inaccuracy cannot be determined by test  because   part, 
or all, of the metering equipment is inoperative, then the  utility  may  use 
the registration of check metering installations, if  any,  or  estimate  the 
quantity of energy consumed based  on  available  data.   The  utility  shall 
advise the customer of the metering equipment failure and of  the  basis  for 
the estimate of the quantity billed. The same periods of inaccuracy shall  be 
used as explained in this rule.
  (7) Recalculation of bills shall be  on  the  basis  of  the   recalculated 
monthly consumption.
  (8) If the recalculated bills indicate that an amount is due  an   existing 
customer or that more than $10.00 is due a former customer  of  the  utility, 
then the utility shall refund the full amount of the difference  between  the 
amount paid and the recalculated amount.
  (9) Refunds shall be made to the 2  most  recent  customers  who   received 
service through the meter found to be inaccurate. If a former customer of the 
utility, a notice of the amount  of  the  refund  shall  be  mailed  to  such 
customer at the last known address. The utility shall, upon  demand  made  by 
the customer within 3 months of mailing of the notice, forward the refund  to 
the customer.
  (10) If the recalculation of billing as a result of a metering   inaccuracy 
indicates that more than $1.00 is owed to the utility by an existing customer 
or that more than $10.00 is owed to the utility by a  former  customer,  then 
the utility may issue a bill for the amount, subject to subrule (12) of  this 
rule.
  (11) Each utility may establish a policy  setting  a  minimum  amount   for 
which it may bill a customer due to under registration that is more than  the 
amounts in subrule (10) of this rule. The minimum amount established  in  the 
utility policy shall be  applied  in  all  cases  of  under  registration  to 
determine whether the customer will be billed for the amount due the  utility 
because of under registration.
  (12) Except in cases of tampering, back billing of customers for   metering 
inaccuracies is limited to the 2-year period immediately preceding  discovery 
of the inaccuracy. The customer shall be given a reasonable time in which  to 
pay the amount of the back billing, after consideration of the amount of  the 
back bill and the duration of the inaccuracy, and service shall not  be  shut 
off during this time for nonpayment of the amount of the back billing if  the 
customer is complying with the repayment agreement.

  History: 2008 AACS.


                        PART 4. CUSTOMER RELATIONS


R 460.3401   Rescinded.

  History:  1983 AACS; 1996 AACS; 2008 AACS.



R 460.3402   Rescinded.

  History:  1983 AACS; 1996 AACS; 2008 AACS.



R 460.3403   Rescinded.

  History:  1983 AACS; 1996 AACS; 2008 AACS.



R 460.3404   Rescinded.

  History:  1983 AACS; 1996 AACS; 2008 AACS.



R 460.3405   Rescinded.

  History:  1983 AACS; 1996 AACS.



R 460.3406   Rescinded.

  History:  1983 AACS; 1996 AACS; 2008 AACS.



R 460.3407   Rescinded.

  History:  1983 AACS; 1996 AACS; 2008 AACS.



R 460.3408   Temporary service; cost of installing  and  removing   equipment 
owned by utility.
  Rule 408. If the utility renders temporary service  to   a   customer,   it 
shall require that the customer bear the cost of  installing   and   removing 
the utility-owned equipment in excess of any salvage realized.

  History:  1983 AACS; 1996 AACS.


R 460.3409   Protection  of   utility-owned    equipment    on     customer's 
premises.
  Rule 409. (1) The customer shall use  reasonable   diligence   to   protect 
utility-owned  equipment  on  the  customer's  premises   and   to    prevent 
tampering or interference with the equipment. The  utility   may   shut   off 
service in accordance with applicable  rules  of  the   commission   if   the 
metering or wiring on the customer's premises has been   tampered   with   or 
altered in any manner that allows unmetered or improperly  metered  energy to 
be used or to cause an unsafe condition.
  (2) If a utility shuts off service for unauthorized use  of  service,  then 
both of the following provisions shall apply:
  (a) The utility may bill the customer for the unmetered  energy  used   and 
any damages that have been caused to utility-owned equipment.
  (b) The utility is not required to restore service   until   the   customer 
does all of the following:
  (i)  Makes  reasonable  arrangements  for  payment  of   the   charges   in 
subdivision (a) of this subrule.
  (ii) Agrees to pay the approved reconnection charges.
  (iii)  Agrees  to  make  provisions  and  pay   charges   for    relocating 
utility-owned equipment or making other reasonable  changes   that   may   be 
requested by the utility to provide better protection for  its  equipment.
  (iv) Provides the utility with reasonable assurance   of   the   customer's 
compliance with the utility's approved standard rules and regulations.
  (3) Failure to comply with the terms of an agreement  to  restore   service 
after service has been shut off pursuant to subrule (1) of this rule shall be 
cause to shut off service in accordance with the rules of  the   utility  and 
the commission.
  (4) If service is shut off pursuant to subrule (3) of this  rule  and   the 
utility must incur extraordinary  expenses  to   prevent   the   unauthorized 
restoration of  service,  the  utility  may  bill  the   customer   for   the 
expenses, in addition to all other charges that may apply  under  this  rule, 
and may require that  the  expenses  and  other  charges   be   paid   before 
restoring service. A  reasonable  effort  shall  be  made   to   notify   the 
customer at the time of shutoff that additional charges may   apply   if   an 
attempt is made to restore service that has been shut off.
  (5) The customer of record who benefits from the unauthorized use  shall be 
responsible for payment to the utility for the energy consumed.
  (6) The utility may bill the customer for the reasonable  actual  cost   of 
the tampering investigation.

  History:  1983 AACS; 1996 AACS.


R 460.3410   Extension of facilities plan.
  Rule 410. Each utility shall develop a plan, approved  by  the  commission, 
for the extensions of facilities where the investment is in  excess  of  that 
included in the regular rates for service and for which   the   customer   is 
required to pay all or part of the cost.

  History:  1983 AACS; 1996 AACS.


R 460.3411   Extension of electric service in areas served by  2   or    more 
utilities.
  Rule 411. (1) As used in this rule:
  (a) "Customer" means the buildings and facilities served  rather  than  the 
individual, association, partnership, or corporation served.
  (b) "Distances"  means  measurements  which  are   determined   by   direct 
measurement from the closest point of a   utility's   existing   distribution 
facilities to the customer's meter location and which are  not  determined by 
the circuit feet involved in any extension.
  (c) "Distribution facilities" means single-phase,  V-phase,   and   3-phase 
facilities and does not include service drops.
  (2) Existing customers shall not transfer from one utility  to  another.
  (3) Prospective customers for  single-phase  service   that   are   located 
within 300 feet of the distribution facilities  of  2   or   more   utilities 
shall have the service of their choice.
  (4) Prospective customers for single-phase service that  are  located  more 
than 300 feet, but within 2,640 feet, from the distribution facilities  of  1 
or more utilities shall be served by the closest utility.
  (5) Prospective customers for single-phase service that  are  located  more 
than 2,640 feet from the distribution facilities of any  utility  shall  have 
the service of their choice, subject to the provisions of  subrule  (10)   of 
this rule.
  (6) Prospective customers for 3-phase service that   are   located   within 
300 feet of the 3-phase distribution facilities of  2   or   more   utilities 
shall have the service of their choice.
  (7) Prospective customers for 3-phase service that are  located  more  than 
300 feet, but within 2,640 feet, from the 3-phase distribution  facilities of 
1 or more utilities shall be served by the closest utility.
  (8) Prospective customers for 3-phase service that are  located  more  than 
2,640 feet from the 3-phase distribution facilities of  any   utility   shall 
have the service of their choice, subject to  the   provisions   of   subrule 
(10) of this rule.
  (9) Regardless of any other provisions in  these   rules,   a   prospective 
industrial  customer,  as  defined  under   the   industrial   classification 
manual, division D, manufacturing, for 3-phase service that   will   have   a 
connected load of more than 500 kilowatts shall have its  choice  of  service 
from any nearby  utility  that  is  willing  to   construct   the   necessary 
facilities. The facilities that are constructed  to   serve   an   industrial 
customer that would otherwise have been served by   another   utility   shall 
not qualify as a measuring point in determining which  utility   will   serve 
new customers in the future.
  (10) The extension of distribution facilities,  except   as   provided   in 
subrules (3), (4), (6), and (7) of this rule, where an  extension   will   be 
located within 1 mile of another utility's  distribution  facilities,   shall 
not be made by a utility without  first  giving  the   commission   and   any 
affected utility 10 days' notice of its  intention  by   submitting   a   map 
showing the location of the  proposed  new   distribution   facilities,   the 
location of the prospective customers, and the location of the  facilities of 
any other utility in  the  area.   If   no   objections   to   the   proposed 
extension of distribution facilities are received by  the  commission  within 
the 10-day notice  period,  the  utility  may  proceed   to   construct   the 
facilities. If objections are received, the determination  of  which  utility 
will extend service may be made the subject of  a  public   hearing   and   a 
determination by the commission, upon proper application  by   any   affected 
party.
  (11) The first utility serving a customer pursuant  to   these   rules   is 
entitled to serve the  entire  electric  load  on  the   premises   of   that 
customer even if another utility is closer to a portion  of  the   customer's 
load.
  (12) A utility may waive its rights to serve  a  customer   or   group   of 
customers if another utility is willing and able to  provide   the   required 
service and if the commission is notified and has no objections.
  (13) Nothing contained in these rules shall be  construed   to   circumvent 
the requirements of Act No. 69 of the Public Acts  of   1929,   as   amended, 
being S460.501 et seq. of the Michigan Compiled Laws, or   to   authorize   a 
utility to extend its service into a municipality  then   being   served   by 
another utility without complying with the provisions of Act No.  69  of  the 
Public Acts of 1929, as amended.
  (14) Regardless of other provisions of this rule, except  subrule  (9),   a 
utility shall not extend service to a new customer in a  manner   that   will 
duplicate  the  existing  electric  distribution   facilities   of    another 
utility,  except  where  both  utilities  are  within  300   feet   of    the 
prospective customer. Three-phase service does  not  duplicate   single-phase 
service when extended to serve a 3-phase customer.
  (15) The first utility to serve a customer in a   new   subdivision   under 
the other provisions of this rule  has  the  right  to   serve   the   entire 
subdivision. In extending service to reach the   subdivision,   the   utility 
shall not duplicate the existing facilities of another utility.

  History:  1983 AACS; 1996 AACS.


                            PART 5. ENGINEERING

R 460.3501   Electric plant; construction,  installation,  maintenance,   and 
operation pursuant to good engineering practice required.
  Rule 501. The electric  plant  of  the  utility   shall   be   constructed, 
installed, maintained, and operated pursuant to  accepted  good   engineering 
practice in  the  electric  industry  to  assure,  as   far   as   reasonably 
possible, continuity of service, uniformity  in  the   quality   of   service 
furnished, and the safety of persons and property.

  History:  1983 AACS.


R 460.3502   Standards of good practice; adoption by reference.
  Rule 502. In the absence of specific rules of the  commission,  a   utility 
shall apply the standards of accepted good practice that   are   adopted   by 
reference in R 460.811 et seq.

  History:  1983 AACS; 1988 AACS; 1996 AACS. 


R 460.3503   Utility plant capacity.
  Rule 503. The electric capacity regularly  available   from   all   sources 
shall be large enough to meet  all  normal  demands  for   service   and   to 
provide a reasonable reserve for emergencies.

  History:  1983 AACS; 1996 AACS.


R 460.3504   Electric plant inspection program.
  Rule 504. Each utility shall  adopt  a  program  of   inspection   of   its 
electric plant to ensure safe and reliable operation. The  frequency  of  the 
various inspections  shall  be  based  on  the   utility's   experience   and 
accepted good practice. Each utility  shall  keep   sufficient   records   to 
verify compliance with its inspection program.

  History:  1983 AACS; 1996 AACS.


R 460.3505    Utility line clearance program.
   Rule 505.  Each utility shall adopt a program of maintaining adequate line 
clearance  through  the  use  of  industry-recognized  guidelines.   A   line 
clearance program shall recognize the national electric safety code standards 
that are adopted by reference in R 460.811 et seq.  The program shall include 
tree trimming.

  History:  1996 AACS.


             PART 6. METERING EQUIPMENT INSPECTIONS AND TESTS

R 460.3601   Customer-requested meter tests.
  Rule 601. (1) Upon request by a customer to a utility,  a   utility   shall 
make a test of the meter serving the customer. Any charge  to  the   customer 
shall conform with the utility's  filed  and  approved  rates  and  rules.
Provided, however, that the utility need not make more than 1  test  in   any 
12-month period.
  (2) The customer, or his or her representative, may be present when  his or 
her meter is tested.
  (3) A report of the results of the test shall be made   to   the   customer 
within a reasonable time after the completion of the test, and  a  record  of 
the report, together with a complete record of each test, shall  be  kept  on 
file at the office of the utility.

  History:  1983 AACS.


R 460.3602 Meter and associated device inspections and  tests;  certification 
of accuracy.
   Rule 602.  Every meter shall  be  inspected  and  tested,  and  associated 
device(s) shall be inspected, in the meter shop of the utility,  or  a  meter 
testing facility certified by the utility, before being  placed  in  service. 
The accuracy of each meter shall be certified to  be  within  the  tolerances 
permitted  by  these  rules,  except  that  the  utility  may  rely  on   the 
certification of accuracy by the manufacturer on all new meters.

  History:  1983 AACS; 2008 AACS.


R  460.3603   Meters  with   transformers;   post-installation    inspection; 
exception.
  Rule 603. Meters  with  associated  instrument   transformers   and   phase 
shifting transformers shall be inspected to determine  the  proper  operation 
and wiring connections. Inspections shall be made  within   60   days   after 
installation by a qualified person who, when possible,  should   be   someone 
other than the original installer. All  self-contained,  socket-type   meters 
are excluded from post-installation inspections, except  that  the   original 
installation shall be inspected when the meter is installed.

  History:  1983 AACS.


R  460.3604   Meters and associated devices; removal tests.
  Rule 604. All meters and associated devices shall be  tested   after   they 
are removed from service unless they are retired because of  obsolescence.

  History:  1983 AACS; 1995 AACS.


R 460.3605 Metering electrical quantities.
   Rule 605.  (1) All  electrical  quantities  that  are  to  be  metered  as 
provided  in  R  460.3301  shall  be  metered  by   commercially   acceptable 
instruments which are owned and maintained by the utility.
   (2) Every reasonable effort shall be made to measure at 1  point  all  the 
electrical quantities necessary for billing a customer under a given rate.
   (3) Metering facilities located at any point  where  energy  may  flow  in 
either direction and where the  quantities  measured  are  used  for  billing 
purposes shall consist of meters equipped with ratchets or other  devices  to 
prevent reverse registration and shall be so connected as to separately meter 
the energy flow in each direction, unless used to implement a utility  tariff 
approved by the commission for service provided under a net metering program.
   (4) Reactive metering shall not be employed for  determining  the  average 
power factor for billing purposes where energy may flow in  either  direction 
or where the customer may generate an appreciable amount of his or her energy 
requirements at any time, unless suitable directional relays and ratchets are 
installed to obtain correct registration under all conditions of operation.
   (5) All electric service of the same type rendered  under  the  same  rate 
schedule shall be  metered  with  instruments  having  like  characteristics, 
except that the commission may be requested to approve the use of instruments 
of  different  types  if  their  use  does   not   result   in   unreasonable 
discrimination. Either all of the reactive meters which may run backwards  or 
none of the reactive  meters  used  for  measuring  reactive  power  under  1 
schedule shall be ratcheted.

  History:  1983 AACS; 2008 AACS.


R  460.3606   Nondirect  reading  meters   and    meters    operating    from 
instrument transformers; marking of multiplier on  instruments;   marking  of 
charts and   magnetic   tapes;   marking   of   register   ratio   on   meter 
registers; watthour constants.
  Rule 606. (1) Meters that are not direct reading   and   meters   operating 
from instrument transformers shall have the multiplier  plainly   marked   on 
the dial of the instrument or otherwise suitably marked.   All   charts   and 
magnetic tapes taken from recording meters shall be marked with  the  date of 
the record, the meter number,  customer,  and  chart  multiplier,  except  as 
provided in R 460.3304.
  (2) The register ratio shall be marked on all meter registers.
  (3) The watthour constant for the meter itself shall  be   shown   on   all 
watthour meters.

  History:  1983 AACS.


R 460.3607 Watt-hour meter requirements.
   Rule 607.  (1) Watthour meters that  are  used  for  measuring  electrical 
quantities supplied shall conform to ANSI specifications and meet all of  the 
following requirements:
   (a) Be of proper design for the circuit on which the meters are  used;  be 
in good mechanical and electrical condition; and  have  adequate  insulation, 
correct internal connections, and correct register.
   (b) Not creep at no load with all load wires disconnected at a rate of one 
complete revolution of the moving element in ten minutes  when  potential  is 
impressed.
   (c) Be accurate to within plus or minus 1.0%,  referred  to  the  portable 
standard watthour meter as a base, at two unity  power  factor  loads:  light 
load (l.l.) and heavy load (h.l.).

  

    

    
Meter Must be Accurate within ±  1.0% 
to 
    Portable Standard
  
  

    

    
Meter Class
    

    
Light Load

    Test Amperes
    

    
Heavy Load

    Test Amperes
    

    
Inductive Load

    50% Lagging Power Factor

    Test Amperes
  
  

    

    
Self-Contained
    

    
10% Rated Test Amperes of Meter

    

    
75-100%  Rated  Test   Amperes   of 
Meter
    

    
75-100%  Rated  Test   Amperes   of 
Meter
  
  

    

    
Transformer Rated
    

    
5-10%   Rated   Test   Amperes   of 
Meter
    

    
75-100%  Rated  Test   Amperes   of 
Meter
    

    
75-100%  Rated  Test   Amperes   of 
Meter
  

  (d) Be accurate to within plus or minus 2.0%,  referred  to  the  portable 
standard watthour meter as a base, at inductive load (i.l.).
   (2) Polyphase meters shall have their elements in balance within  2.0%  at 
rated test amperes at unity power factor and  at  approximately  50%  lagging 
power factor.
   (3) Meters that are used with instrument transformers shall be adjusted so 
that the overall accuracy of the metering installation meets the requirements 
of this rule.
   (4) Meters and associated devices shall be adjusted as close as  practical 
to zero error and within the accuracy limits specified in subrule  (1)(c)  of 
this rule.

  History:  1983 AACS; 2008 AACS.


R  460.3608   Demand meters, registers, and attachments; requirements.
  Rule 608. A demand meter, demand register, or demand  attachment  that   is 
used to measure a customer's service  shall  meet  all   of   the   following 
requirements:
  (a) Be in good mechanical and electrical condition.
  (b) Have proper constants, indicating scale,  contact   device,   recording 
tape or chart, and resetting device.
  (c) Not register at no load.
  (d) Be accurate to the following degrees:
  (i)  Curve-drawing  meters  that   record    quantity-time    curves    and 
integrated-demand meters shall be accurate to within plus or  minus  2.0%  of 
full scale throughout  their  working  range.   Timing   elements   measuring 
specific demand intervals shall be accurate to within plus  or  minus   2.0%, 
and the timing element which serves to provide a record of the  time  of  day 
when the demand occurs shall be accurate to within plus or minus 4 minutes in 
24 hours.
  (ii) Lagged-demand meters shall be accurate to within plus or minus 4.0% of 
full scale at final indication.

  History:  1983 AACS.


R 460.3609   Instrument  transformers  used  in  conjunction  with   metering 
equipment; requirements; phase shifting transformers; secondary voltage.
   Rule 609.  (1) Instrument transformers used in conjunction  with  metering 
equipment to measure a customer's service shall meet both  of  the  following 
requirements:
   (a) Be in proper mechanical condition  and  have  satisfactory  electrical 
insulation for the service on which used.
   (b) Have characteristics  such  that  the  combined  inaccuracies  of  all 
transformers supplying 1 or more meters in  a  given  installation  will  not 
exceed the percentages listed in the following chart:
	100% Power 	50% 
	Factor		Power Factor
				
Current	10%	100%	10%	100%
Error	1%	0.75%	3%	2%


  (2) Meters that are used in  conjunction  with  instrument   transformers   
shall 
be adjusted so that the  overall  accuracies  will  come  within  the  limits 
specified in this part.
  (3) Instrument transformers shall be tested with the meter with which they 
are associated by making an overall test or may be checked separately. If the 
transformers are tested separately, the meters shall also be checked  to  see 
that the overall accuracy  of  the  installation  is  within  the  prescribed 
accuracy requirements. (See R 460.3613 (6).)
   (4) The results of tests of  instrument  transformers  shall  be  kept  on 
record and shall be available for use.
   (5) Phase  shifting  transformers  shall  have  secondary  voltages  under 
balanced line voltage conditions within plus or minus  1.0%  of  the  voltage 
impressed on the primary side of the transformer.

  History:  1983 AACS; 2008 AACS.


R 460.3610  Portable indicating voltmeters; accuracy.
   Rule  610.   All  portable  indicating  voltmeters  that  are   used   for 
determining the quality of service voltage  to  customers  shall  be  checked 
against a suitable secondary reference standard at least once every 6  months 
for analog devices, and  once  every  12  months  for  digital  devices.  The 
accuracy of these voltmeters  shall  be  rated  so  that  the  error  of  the 
indication is not more than plus or minus 1% of full scale. If  the  portable 
indicating voltmeter is found to be in error by more than the rated  accuracy 
at commonly used scale deflections, it shall be adjusted.

  History:  1983 AACS; 2008 AACS.


R 460.3611   Meter testing equipment; availability; provision  and  use    of 
primary standards.
  Rule 611. (1) A utility shall maintain   sufficient   laboratories,   meter 
testing  shops,  secondary  standards,  instruments,   and   facilities    to 
determine the accuracy of all types of meters and measuring  devices  used by 
the utility. The utility may, if necessary,  have  all   or   part   of   the 
required tests made, or its portable testing equipment  checked,  by  another 
utility or agency which is  approved  by  the  commission   and   which   has 
adequate and sufficient testing equipment to comply with these rules.
  (2) At a minimum, a utility shall keep  all  of   the   following   testing 
equipment available:
  (a) One or more portable standard watthour meters that   has   a   capacity 
and voltage range which is adequate to test all watthour   meters   used   by 
the utility.
  (b) Portable indicating instruments that are necessary  to  determine   the 
accuracy of all instruments used by the utility.
  (c) One or more secondary standards to check each of the  various  types of 
portable standard watthour meters used  for  testing  watthour  meters.
Each secondary standard shall consist of  an   approved   portable   standard 
watthour meter which is kept permanently at 1 point and which  is  not   used 
for fieldwork. Standards shall be well-compensated  for   both   classes   of 
temperature errors, shall be practically free from errors  due  to   ordinary 
voltage variations, and shall be free from erratic registration  due  to  any 
cause.
  (d) Suitable standards, which are  not  used  for   fieldwork,   to   check 
portable instruments used in testing.
  (3) A  utility  shall  provide  and  use  primary   standards   that   have 
accuracies which are traceable to the United States  National  Institute   of 
Standards and Technology (NIST).

  History:  1983 AACS; 1995 AACS.


R 460.3612  Test standards; accuracy.
   Rule 612. (1) The accuracies of all primary reference standards  shall  be 
certified as traceable to the National Institute of Standards and  Technology 
(NIST), either directly or through other recognized  standards  laboratories.
These standards shall have their accuracy certified at the time of  purchase.
Standard cells shall be intercompared regularly and at least 1 standard  cell 
shall be checked by a standardizing laboratory at intervals of not more  than 
2 years. Reference standards of resistance, potentiometers,  and  volt  boxes 
shall be checked at intervals of not more than 3 years.
   (2) Secondary watthour meter standards shall not be in error by more  than 
plus or minus 0.3% at loads and voltages at which they are to  be  used,  and 
shall not be used  to  check  or  calibrate  working  standards,  unless  the 
secondary standard has been checked and adjusted, if  necessary,  within  the 
preceding 6  months.  Each  secondary  standard  watthour  meter  shall  have 
calibration data available and shall have a history card.
   (3) Secondary standards indicating instruments shall not be  in  error  by 
more than plus or minus 0.5% of indication at commonly used scale  deflection 
and shall not be used to check or calibrate portable indicating  instruments, 
unless the secondary standard has been checked and  adjusted,  if  necessary, 
within the preceding 12 months. A calibration record shall be maintained  for 
each standard.
   (4) Regularly used working portable  standard  watthour  meters  shall  be 
compared with a secondary standard at least once every 6 months. Infrequently 
used working standards shall be compared with  a  secondary  standard  before 
they are used.
   (5) Working portable standard watthour meters shall be  adjusted  so  that 
their percent registration is within 99.7% and 100.3% at  100%  power  factor 
and within 99.5% and 100.5% at 50% lagging power factor at all  voltages  and 
loads at which the standard may be used. A  history  and  calibration  record 
shall be kept for each working standard.
   (6) The meter accuracies required in this rule for all primary, secondary, 
and working standards shall be referred to 100%.  Service measuring equipment 
shall be adjusted to within the accuracies  required  assuming  the  portable 
test equipment to be 100% accurate with the calibration correction taken into 
consideration.

  History:  1983 AACS; 1995 AACS; 2008 AACS.


R 460.3613   Metering equipment testing requirements.
  Rule 613. (1) The testing of any unit of metering equipment shall   consist 
of a comparison of its accuracy with a  standard  of  known  accuracy.  Units 
which are not properly connected or which do not meet the accuracy  or  other 
requirements of these meter and metering  equipment  rules  at  the  time  of 
testing shall be reconnected or rebuilt to meet such requirements  and  shall 
be adjusted to within the required accuracy and as close  to  zero  error  as 
practicable or else their use shall be discontinued.
  (2) Self-contained, single-phase meters,  except  for  combination   meters 
(meters that  include  demand  devices  or  control  devices),  shall  be  in 
compliance with all of the following requirements:
  (a) Be checked for accuracy at unity power factor at  the  point  where   a 
meter is installed, at a central  testing  point,  or  in  a  mobile  testing 
laboratory within a period of from 12 months before,  to  60  days  after,  a 
meter is placed in service, except as provided for  in  R  460.3602,  and  in 
subrule (3) of this rule, and not later than 9 months  after  192  months  of 
service for a surge-resistant meter and not later  than  9  months  after  96 
months of service for a non-surge-resistant meter.
  (b) Notwithstanding the provisions of subdivision  (a)  of  this   subrule, 
upon application to the commission and upon  receipt  of  an  order  granting 
approval, the testing of self-contained, single-phase meters in service shall 
be governed by a quality control plan as follows:
  (i) Meters shall be divided  into  homogeneous  groups  by   manufacturers' 
types, except as follows:
  (A) Certain manufacturers' types shall be further subdivided into  separate 
groups by manufacturers' serial numbers as follows:
  (1)  General  Electric  type  I-30  shall  be  divided  at  serial   number 
20,241,829.
  (2) Westinghouse type C shall be divided at serial number 16,350,000.
  (3) Duncan type MF shall be divided at serial number 2,650,000.
  (4) Sangamo type J meters shall be divided  starting  with  serial   number 
10,000,000.
  (B) Non-surge-resistant meters that are installed in nonurban areas   shall 
be treated as separate groups by manufacturers' type.
  (ii) The meters in each homogeneous group shall then be further  subdivided 
into lots of not less than 301, and not more than 10,000, meters each, except 
that meters of the most recent design may be combined into lots regardless of 
manufacturers' type, except that where the number of meters of a single  type 
is 8,001 or more, that number of meters shall be segregated by types for  the 
formation of lots.
  (iii) From each assembled lot, a sample of the  size  specified  in   table 
A-2, ANSI/ASQC Z1.9, shall be drawn annually. The sample shall  be  drawn  at 
random.
  (iv) The meters in each sample shall be tested for  accuracy  pursuant   to 
the provisions of these rules.
  (v) The test criteria for acceptance or rejection of  each  lot  shall   be 
based on the test at heavy load only and shall be that designated for  double 
specification limits and an acceptable quality level (AQL) that is not higher 
than 2.50 (normal inspection) as shown in table B-3, ANSI/ASQC Z1.9.
  (vi) The necessary calculations shall be made pursuant to Example  B-3   of 
ANSI/ASQC Z1.9. The upper and lower specification limits, U and L,  shall  be 
102% and 98%, respectively.
  (vii) A lot shall be rejected if the total estimated percent defective  (p) 
exceeds the appropriate maximum allowable percent defective (M) as determined 
from table B-3 as specified in paragraph (v) of this subdivision.
  (viii) All meters in a rejected lot  shall  be  tested  within  a   maximum 
period of 48 months and shall be adjusted pursuant to  the  provisions  of  R 
460.3607 or shall be replaced with meters that are  in  compliance  with  the 
requirements of R 460.3607.
  (ix) During each calendar year,  new  meter  samples  shall  be  drawn   as 
specified in this subdivision from all meters in service, with the  exception 
that lots that have  been  rejected  shall  be  excluded  from  the  sampling 
procedure until all meters included in the rejected lots have been tested.
  (x) The utility may elect to adopt a mixed  variables-attributes   sampling 
plan as outlined in Section A9 of ANSI/ASQC Z1.9, in which case, a  lot  that 
is not in  compliance  with  the  acceptability  criteria  of  the  variables 
sampling plan shall be resampled  the  following  year  using  an  attributes 
sampling plan. If the acceptability criteria of the attributes sampling  plan 
are met, then the lot shall be considered acceptable and shall be returned to 
the variables sampling plan the following year. If the acceptability criteria 
of the attributes sampling plan are not met, then that lot shall be  rejected 
and all meters in the lot shall be tested and adjusted or replaced  within  a 
maximum period of 36 months after the second rejection.
  (xi) The plan specified in paragraph (x)  of  this  subdivision  does   not 
alter the rules under which customers may request special tests of meters.
  (c) Be checked for accuracy in all of the following situations:
  (i) When a meter is suspected of being inaccurate or damaged.
  (ii) When the accuracy of a meter is questioned  by  a  customer.  (See   R 
460.3601.)
  (iii) Before use if a meter has been inactive for more than 1  year   after 
having been in service.
  (iv) When a meter has been removed from service and has  not  been   tested 
within the previous 48 months.
  (d) Be inspected for mechanical and electrical faults when the accuracy  of 
the device is checked.
  (e) Have the register and the  internal  connections  checked  before   the 
meter is first placed in service and when the meter is repaired.
  (f) Have the connections to the customer's circuits checked when the  meter 
is tested on the premises or when removed for testing.
  (g) Be checked for accuracy at 50% power factor when purchased  and   after 
rebuilding.
  (h) A meter need not be tested or checked for any reason,  except  when   a 
complaint is received, if the device was tested, checked,  and  adjusted,  if 
necessary, within the previous 12 months.
  (3) Notwithstanding the provisions of subrules (4)(a)(ii), (5)(a) (ii)  and 
(6)(a)(iii) of this rule, upon application to the commission and upon receipt 
of an order granting approval, the solid state meters described  in  subrules 
(4), (5) and (6) of this rule in service  may  elect  to  be  governed  by  a 
quality control plan as follows:
  (a) Meters shall be divided  into  homogeneous  groups  by   manufacturers' 
types.
  (b) The meters in each homogeneous group shall then be further   subdivided 
into lots of not less than 301, and not more than 10,000, meters each, except 
that meters of the most recent design may be combined into lots regardless of 
manufacturers' type, except that where the number of meters of a single  type 
is 8,001 or more, that number of meters shall be segregated by types for  the 
formation of lots.
  (c) From each assembled lot, a sample of the size specified in table   A-2, 
ANSI/ASQC Z1.9, shall be drawn annually. The sample shall be drawn at random.
  (d) The meters in each sample shall be tested for accuracy pursuant to  the 
provisions of these rules.
  (e) The test criteria for acceptance or rejection of  each  lot  shall   be 
based on the test at heavy load only and shall be that designated for  double 
specification limits and an acceptable quality level (AQL) that is not higher 
than 2.50 (normal inspection) as shown in table B-3, ANSI/ASQC Z1.9.
  (f) The necessary calculations shall be made pursuant to  Example  B-3   of 
ANSI/ASQC Z1.9. The upper and lower specification limits, U and L,  shall  be 
102% and 98%, respectively.
  (g) A lot shall be rejected if the total estimated percent  defective   (p) 
exceeds the appropriate maximum allowable percent defective (M) as determined 
from table B-3 as specified in paragraph (e) of this subdivision.
  (h) All meters in a rejected lot shall be tested within a  maximum   period 
of 48 months and shall be adjusted pursuant to the provisions of  R  460.3607 
or shall be replaced with meters that are in compliance with the requirements 
of R 460.3607.
  (i) During each calendar  year,  new  meter  samples  shall  be  drawn   as 
specified in this subdivision from all meters in service, with the  exception 
that lots that have  been  rejected  shall  be  excluded  from  the  sampling 
procedure until all meters included in the rejected lots have been tested.
  (j) The utility may elect to adopt a mixed  variables-attributes   sampling 
plan as outlined in Section A9 of ANSI/ASQC Z1.9, in which case, a  lot  that 
is not in  compliance  with  the  acceptability  criteria  of  the  variables 
sampling plan shall be resampled  the  following  year  using  an  attributes 
sampling plan. If the acceptability criteria of the attributes sampling  plan 
are met, the lot shall be considered acceptable and shall be returned to  the 
variables sampling plan the following year. If the acceptability criteria  of 
the attributes sampling plan are notmet, then that lot shall be rejected  and 
all meters in the lot shall be tested  and  adjusted  or  replaced  within  a 
maximum period of 36 months after the second rejection.
  (k) The plan specified in paragraph (j) of this subdivision does not  alter 
the rules under which customers may request special tests of meters.
  (4) All single-phase meters that are not included  in  the  provisions   of 
subrule (2) of this rule, together with associated equipment, such as  demand 
devices, control devices and instrument transformer-rated meters, shall be in 
compliance with all of the following requirements:
  (a) Be checked for accuracy at unity power factor at  the  point  where   a 
meter is installed, at a central  testing  point,  or  in  a  mobile  testing 
laboratory as follows:
  (i) Within a period of from 12 months before, to 60 days after, a meter  is 
placed in service, exceptions to this subrule (4)(a)  of  this  rule  are  as 
provided for in R 460.3602 and for solid state meters.
  (ii)  Not  later  than  9  months  after  144  months  of  service  for   a 
surge-resistant meter and not later than 9 months after 96 months of  service 
for a non-surge-resistant meter.
  (iii) When a meter is suspected of being inaccurate or damaged.
  (iv) When the accuracy of a meter is questioned  by  a  customer.  (See   R 
460.3601.)
  (v) Before use when a meter has been inactive for more than 1  year   after 
having been in service.
  (vi) When a meter is removed from service and has not been tested within  a 
period equal to 1/2 of the normal test schedule.
  (b) Be inspected for mechanical and electrical faults when the accuracy  of 
the device is checked.
  (c) Have the register and the  internal  connections  checked  before   the 
meter is first placed in service and when the meter is repaired.
  (d) Have the connections to the customer's circuits checked when the  meter 
is tested on the premises or when removed for testing.
  (e) Be checked for accuracy at 50% power factor when purchased  and   after 
rebuilding.
  (f) A meter need not be tested or checked for any reason,  except  when   a 
complaint is received, if the device was tested,  checked  and  adjusted,  if 
necessary, within the previous 12 months.
  (5) All self-contained, 3-phase meters and associated equipment  shall   be 
in compliance with all of the following requirements:
  (a) Be tested for accuracy at unity and 50% power factor as follows:
  (i) Before being placed in service.
  (ii) Not later than 9 6 months after 120 months of service.
  (iii) When a meter is suspected of being inaccurate or damaged.
  (iv) When the accuracy of a meter is questioned  by  a  customer.  (See   R 
460.3601.)
  (v) When a meter is removed from service.
  (b) Be inspected for mechanical and electrical faults when the accuracy  is 
checked.
  (c) Have the register and internal connections checked before the meter  is 
first installed, when repaired and when the register is changed.
  (d) Have the  connections  to  the  customer's  circuits  and   multipliers 
checked when the equipment is tested for accuracy on the customer's premises.
  (6) All transformer-rated, 3-phase meters and associated  equipment   shall 
be in compliance with all of the following requirements:
  (a) Be checked for accuracy at unity and 50% power factor as follows:
  (i) Before being placed in service.
  (ii) On the customer's premises within 60 days after installation,   unless 
the transformers are in compliance with the specifications  outlined  in  the 
American National Standards Institute standard ANSI C-57.13, and  unless  the 
meter adjustment limits do not exceed plus or minus 1.5% at 50% power factor.
  (iii) Not later than 9 months after 72 months of service.
  (iv) When a meter is suspected of being inaccurate or damaged.
  (v) When the accuracy is questioned by a customer. (See R 460.3601.)
  (vi) When a meter is removed from service.
  (b) Be inspected for mechanical and electrical faults when the accuracy  is 
checked.
  (c) Have the register and internal connections checked before the meter  is 
first placed in service and when the meter is repaired.
  (d) Have the  connections  to  the  customer's  circuits  and   multipliers 
checked when the equipment is tested for accuracy on  the  premises  or  when 
removed for testing and when instrument transformers are changed.
  (e) Be checked for accuracy at 50% power factor when purchased  and   after 
rebuilding.
  (7) Instrument transformers shall  be  tested  in  all  of  the   following 
situations:
  (a) When  first  received,  unless  a  transformer  is  accompanied  by   a 
certified test report by the manufacturer.
  (b) When removed from service.
  (c) Upon complaint.
  (d) When there is evidence of damage.
  (e) When an approved check, such as the variable burden method in the  case 
of current transformers that is made when the meter is tested indicates  that 
a quantitative test is required.
  (8) Demand meters shall be  in  compliance  with  both  of  the   following 
requirements:
  (a) Be tested for accuracy in all of the following situations:
  (i) Before a meter is placed in service.
  (ii) When an associated meter is tested and the demand meter  is  a   block 
interval nonrecording type or a thermal type.
  (iii) After 2 years of service if the meter is of the recording type,   but 
testing is not required if the meter is of the pulse-operated  type  and  the 
demand reading is checked with the kilowatt-hour reading each billing cycle.
  (iv) When a meter is suspected of being inaccurate or damaged.
  (v) When the accuracy is questioned by a customer. (See R 460.3601.)
  (vi) When a meter is removed from service.
  (b) Be inspected for mechanical and electrical  faults  when  a  meter   is 
tested in the field or in the meter shop.

  History:  1983 AACS; 1995 AACS; 2008 AACS.


R 460.3614   Standards check by the commission.
  Rule 614. (1) Upon request of the commission, a utility shall  submit  1 of 
its  portable  standard   watthour   meters   and   1   portable   indicating 
voltmeter, ammeter,  and  wattmeter  to   a   commission-approved   standards 
laboratory for checking of their accuracy.
  (2) A utility shall normally check its  own   working   portable   standard 
watthour meters or instruments against primary or  secondary  standards   and 
shall calibrate these working standards or  instruments   before   they   are 
submitted with a record of  such  calibration  attached  to   each   of   the 
working standards or instruments.

  History:  1983 AACS.


R 460.3615   Metering equipment records.
  Rule 615. (1) A complete record of the most recent test  of  all   metering 
equipment shall be maintained. The record shall show all  of  the   following 
information:
  (a) Identification and location of unit.
  (b) Equipment with which the device is associated.
  (c) The date of test.
  (d) Reason for the test.
  (e) Readings before and after the test.
  (f) A statement as to whether or not the meter creeps and,   in   case   of 
creeping, the rate.
  (g)  A  statement  of  meter  accuracies  before   and   after   adjustment 
sufficiently complete to permit checking of the calculations employed.
  (h) Indications showing that all required checks have been made.
  (i) A statement of repairs made, if any.
  (j) Identification of the testing standard and  the   person   making   the 
test.
  (2) The utility shall also keep  a  record  of  each   unit   of   metering 
equipment which shows all of the following information:
  (a) When the unit was purchased.
  (b) The unit's cost.
  (c) The company's identification.
  (d) Associated equipment.
  (e) Essential nameplate date.
  (f) The date of the last test. The record shall  also   show   either   the 
present service location with the date of installation or,  if  removed  from 
service, the service location from which the unit  was   removed   with   the 
date or removal.

  History:  1983 AACS.


R 460.3616   Average meter error; determination.
  Rule 616. If a metering installation is found upon any  test   to   be   in 
error by more than 2% at  any  test  load,  the  average   error   shall   be 
determined in 1 of the following ways:
  (a) If the metering installation is used to measure  a   load   which   has 
practically constant characteristics, such as a  streetlighting   load,   the 
meter shall be tested under similar conditions of load and  the  accuracy  of 
the meter "as found" shall be considered as the average accuracy.
  (b) If a single-phase metering installation is used on  a   varying   load, 
the average error shall be the weighted algebraic average of  the  error   at 
light load and the error at heavy load, the latter being given a weighting of 
4 times the former.
  (c) If a polyphase metering installation is used on a  varying  load,   the 
average error shall be the weighted algebraic  average  of   its   error   at 
light load given a weighting of 1, its error at heavy load  and  100%   power 
factor given a weighting of 4, and at heavy load  and   50%   lagging   power 
factor given a weighting of 2.
  (d) If a load, other than the light, heavy, and low   power   factor   load 
specified for routine testing, is more representative of the customary use of
 the  metering  equipment,  its  error   at   that   load   shall   also   be 
determined. In this case, the average error shall be   computed   by   giving 
the error at such load and power factor a weighting of 3 and  each   of   the 
errors at the other loads (light, heavy, and 50% lagging  power   factor)   a 
weighting of 1. Each error shall be assigned its proper sign.

  History:  1983 AACS.


R 460.3617   Reports to be filed with the commission.
  Rule 617. (1) A utility shall file, with the commission,  within  30   days 
after the  first  day  of  January  of  each   year,   an   officer-certified 
statement that the utility has complied with all of  the   requirements   set 
forth in these rules relating to meter standardizing equipment.
  (2) For all meters  that  are  not  included  in  the   provisions   of   R 
460.3613(2)(b), the utility shall file, with the commission,  on  or   before 
the first day of April of each year, its annual tabulation of  all   of   its 
prior-to-adjustment meter test results covering the  12-month  period  ending 
December 31. The utility shall summarize, by meter   type,   all   individual 
meters and overall light and heavy load prior-to-adjustment  test  results at 
the power factors required by these rules. The summary shall be divided  into 
heavy load 100% power factor, light load 100% power factor,  and  heavy  load 
50% power factor test results and shall also be  divided  according   to  the 
length of meter test  period  and  types  of   single-phase   and   polyphase 
meters. The summary shall show the number of meters or  overall  tests  found 
within each of the following accuracy classifications:
  (a) No recording.
  (b) Creeping.
  (c) Equal to or less than 94.0%.
  (d) 94.1 to 96.0%.
  (e) 96.1 to 97.0%.
  (f) 97.1 to 98.0%.
  (g) 98.1 to 99.0%.
  (h) 99.1 to 100.0%.
  (i) 100.1 to 101.0%.
  (j) 101.1 to 102.0%.
  (k) 102.1 to 103.0%.
  (l) 103.1 to 104.0%.
  (m) 104.1 to 106.0%.
  (n) Over 106.0%.
When a utility is subject to multiple state  jurisdiction,   these   accuracy 
classifications may be modified with the approval of the commission.
  (3)  For  all  meters  that  are  included  in  the   provisions    of    R 
460.3613(2)(b), the utility shall file, with the commission,  on  or   before 
the first day of April, all of the following information:
  (a) A summary of all samples of meter lots that  pass   the   acceptability 
criteria as set forth in ANSI/ASQC Z1.9-1980, including  complete   data   on 
all of the following:
  (i) The type of meter.
  (ii) The number of meters in a lot.
  (iii) The size of the sample.
  (iv) The average months in service since the last test.
  (v) The computed p (total estimated percent defective in lot).
  (vi) The  corresponding  M  (maximum  allowable   percent   defective)   as 
determined from table B-3 in ANSI/ASQC Z1.9-1980.
  (b) The necessary calculations made pursuant to Example  B-3  of  ANSI/ASQC 
Z1.9-1980 shall be retained for each sample or resample drawn. In addition to 
the actual computation, the data shall include all of the following:
  (i) The type of meter.
  (ii) The number of meters in the lot.
  (iii)The meter numbers of sample meters.
  (iv) The actual prior-to-adjustment test data of each meter tested.
  (v) The number of months since the last  test  for  each   meter   in   the 
sample.
A sample  of  the  calculations  and  data  for  a  lot   that   passes   the 
acceptability criteria shall be included in the report to the  commission.
  (c) A copy of the complete data, as outlined in this  subrule,   shall   be 
included  for  each  meter  lot  that  is  not  in   compliance   with    the 
acceptability criteria of the sampling  plan  employed  as   set   forth   in 
ANSI/ASQC Z1.9-1980.
  (d) A report summarizing the testing of all meters in  rejected  lots  that 
are to be returned to service. The heavy  load   preadjustment   tests   only 
shall be recorded, and the  accuracy  classifications   as   established   in 
subrule (2) of this rule  shall  be  used.  Each  rejected   lot   shall   be 
reported separately and shall be separated into groups by   the   number   of 
months since the last test as follows:
  (i) 0 to 48 months.
  (ii) 49 to 72 months.
  (iii) 73 to 96 months.
  (iv) More than 96 months.

  History:  1983 AACS; 1995 AACS.


R 460.3618   Generating and interchange station   meter   tests;    schedule; 
accuracy limits.
  Rule 618. (1) Generating and interchange  station   and   watthour   meters 
shall be tested in conjunction with their associated equipment as follows:
  (a) At least once every 24 months for generating station meters.
  (b) At least once every 12 months for interchange meters.
  (2) The accuracy limits for any particular device shall  not   be   greater 
than the accuracy limits required elsewhere in these rules.

  History:  1983 AACS.


                 PART 7. STANDARDS OF QUALITY OF SERVICES

R 460.3701   Alternating current systems; standard frequency.
  Rule 701. The standard frequency for alternating current  systems  shall be 
60 hertz. The frequency shall  be  maintained   within   limits   that   will 
permit the satisfactory operation of customers' clocks which are connected to 
the system.

  History:  1983 AACS; 1996 AACS.


R 460.3702   Standard nominal service voltage; limits; exceptions.
  Rule 702. (1) Each utility  shall  adopt  and   submit   standard   nominal 
service voltages.
  (2) With respect to secondary voltages, the  following   provisions   shall 
apply:
  (a) For all retail service, the variations of voltage shall  be  not   more 
than 5% above or below the standard nominal voltage as submitted  pursuant to 
subrule (1) of this rule, except as noted in subrule (4) of this  rule.
  (b) Where 3-phase  service  is  provided,  the   utility   shall   exercise 
reasonable care to ensure that the  phase  voltages   are   balanced   within 
practical tolerances.
  (3) With respect to primary voltages,  the   following   provisions   shall 
apply:
  (a) For service rendered principally for industrial  or   power   purposes, 
the voltage variation shall not  be  more  than  5%  above   or   below   the 
standard nominal voltages as submitted pursuant to  subrule   (1)   of   this 
rule, except as noted in subrule (4) of this rule.
  (b) The limitations in subdivision (a) of this subrule do  not   apply   to 
special contracts in which the  customer  specifically   agrees   to   accept 
service with unregulated voltage.
  (4) Voltages outside the limits specified in  this  rule   shall   not   be 
considered a violation if the variations are   infrequent   fluctuations   or 
occur from  adverse  weather  conditions,   service   interruptions,   causes 
beyond the control of the utility, or voltage reductions that are required to 
reduce system load at times of supply deficiency or loss of supply.

  History:  1983 AACS; 1996 AACS.


R 460.3703   Voltage measurements and records.
  Rule 703. (1) Voltage  measurements  shall  be  made   at   the   utility's 
service terminals.
  (2) Each utility shall make a sufficient number  of  voltage  measurements, 
using recording voltmeters, to determine if  voltages   are   in   compliance 
with the requirements stated in R 460.3702.
  (3) All records obtained  under  subrule  (2)  of  this   rule   shall   be 
retained by the utility for not less than 2 years and  shall   be   available 
for inspection by the  commission's  representatives.   The   records   shall 
indicate all of the following information:
  (a) The location where the voltage was measured.
  (b) The time and date of the measurement.
  (c) The results of the comparison with an indicating   voltmeter   at   the 
time a recording meter is set.

  History:  1983 AACS; 1996 AACS.


R 460.3704   Voltage measurements; required  equipment;   periodic    checks; 
certificate or calibration card for standards.
  Rule 704. (1) Each utility shall have access to at   least   1   indicating 
voltmeter that has a stated accuracy  within  0.25%  of   full   scale.   The 
instrument shall be maintained within its stated accuracy.
  (2) Each utility shall have not less than 2  indicating   voltmeters   that 
have a stated accuracy within 1.0% of full scale.
  (3)  Each  utility  shall  have  not  less  than   2   portable   recording 
voltmeters, or their electronic equivalent, with a  stated  accuracy   within 
1.5% of full scale.
  (4) Standards shall be checked in accordance with R 460.3612.
  (5) Working instruments shall be checked in accordance with R  460.3610.
  (6) Each standard shall be accompanied at all times by  a  certificate   or 
calibration card, duly signed and dated, on which the corrections required to 
compensate for errors found at the customary test points at the time  of  the 
last test are recorded.

  History:  1983 AACS; 1996 AACS.


R 460.3705   Interruptions of  service;   records;   planned    interruption; 
notice to commission.
  Rule 705. (1) Each utility shall  make  a  reasonable   effort   to   avoid 
interruptions of service.  When  interruptions  occur,   service   shall   be 
restored within the shortest time practical, consistent with safety.
  (2) Each utility  shall  keep  records  of   sustained   interruptions   of 
service to its customers and shall make an analysis of the  records  for  the 
purpose of determining steps to be taken  to  prevent   recurrence   of   the 
interruptions.  The  records  shall  include   the   following    information 
concerning the interruptions:
  (a) Cause.
  (b) Date and time.
  (c) Duration.
  (3) Planned interruptions shall be made at a time that   will   not   cause 
unreasonable  inconvenience  to  customers  and  shall   be   preceded,    if 
feasible, by adequate notice to persons who will be affected.
  (4) Each utility shall promptly  notify  the  commission   of   any   major 
interruption of service to its customers.

  History:  1983 AACS; 1996 AACS.


                              PART 8. SAFETY

R 460.3801   Protective measures.
  Rule 801. Each utility shall exercise  reasonable  care   to   reduce   the 
hazards to which its employees, its customers, and the general public  may be 
subjected.

  History:  1983 AACS.


R 460.3802   Safety program.
  Rule  802.  Each  utility  shall  comply  with  the   provisions   of   the 
occupational safety and health act, 29 U.S.C. S651 et seq.,  and  Act  No.
154 of the Public Acts of 1974, as amended, being S408.1001 et  seq.  of  the 
Michigan Compiled Laws, and known as the Michigan  occupational  safety   and 
health act, and shall operate under applicable federal   and   state   health 
and safety laws and regulations.

  History:  1983 AACS; 1996 AACS.


R 460.3803   Energizing services.
  Rule 803. When energizing services, each utility shall  comply   with   the 
provisions of all applicable  codes  and   statutory   requirements,   unless 
otherwise specified by the commission. The utility may refuse to  energize  a 
service if an unsafe condition is observed.

  History:  1983 AACS; 1996 AAC.


R 460.3804   Accidents; notice to commission.
   Rule 804.  Each utility shall promptly notify the commission of fatalities 
and serious injuries that are substantially  related  to  the  facilities  or 
operations of the facilities.

  History:  1996 AACS.


R 460.3901   Rescinded.

  History:  1983 AACS; 1989 AACS; 1996 AACS. 


R  460.3902  Rescinded.


  History:  1983 AACS; 1996 AACS.



R  460.3903   Rescinded.

  History:  1983 AACS; 1996 AACS.



R  460.3904   Rescinded.

  History:  1983 AACS; 1996 AACS.



R  460.3905   Rescinded.

  History:  1983 AACS; 1996 AACS.



R  460.3906   Rescinded.

  History:  1983 AACS; 1996 AACS.



R 460.3907    Rescinded.

  History:  1996 AACS. 


R 460.3908   Rescinded.

  History:  1996 AACS.