Section R. 460.3609 - Instrument transformers used in conjunction with metering equipment; requirementsRule 609.
(1) Instrument transformers used in conjunction with metering equipment to measure a customer's service must meet both of the following requirements: (a) Be in proper mechanical condition and have satisfactory electrical insulation for the service on which used.(b) Meet minimum metering accuracy class 0.3 as defined in IEEE/ANSI C57.13-2016 or accuracy class 0.15 as defined in IEEE C57.13.6-2005.(2) The results of tests of instrument transformers must be kept on record and available for use.Mich. Admin. Code R. 460.3609
1983 AACS; 2008 AACS; 2023 MR 7, Eff. 4/10/2023