In this section, “meter” or “meters” may refer to metering system(s).

1. (1) A demand meter, demand register, or demand attachment used to measure customer’s service shall:

   1. (a) Be in good mechanical and electrical condition.
   2. (b) Have proper constants, indicating scale, contact device and resetting device.
   3. (c) Not register at no load.

   4. (d) Be accurate to the following degrees:

      1. 1. Curve drawing meters which 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 elements which serve 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.
      2. 2. Lagged-demand meters shall be accurate to within plus or minus 4% of full scale at final indication.
2. (2) The overall accuracy of demand metering installations utilizing pulse-initiator and pulse-recorder equipment shall be acceptable when the monthly kilowatt-hours calculated from the pulse count do not differ from the corresponding kilowatt-hour meter registrations by more than the kilowatt-hour constant of the meter, or 2%, whichever is greater. The timing element error shall not be more than plus or minus 4 minutes per day.
3. (3) When a timing element also serves to keep a record of the time of day at which the demand occurs, it shall be corrected if it is found to be in error by more than plus or minus 4 minutes per day.

History

History: Cr. Register, July, 2000, No. 535, eff. 8-1-00.