Section R. 460.3605 - Metering electrical quantitiesRule 605.
(1) All electrical quantities that are to be metered as provided in R 460.3301 must be metered by commercially acceptable instruments which are owned and maintained by the electric utility or cooperative.(2) Every reasonable effort must be made to measure at 1 point all the electrical quantities necessary for billing a customer under a given rate.(3) For electro-mechanical meters, metering facilities located at any point where energy may flow in either direction and where the quantities measured are used for billing purposes must consist of meters equipped with ratchets or other devices to prevent reverse registration and must be so connected as to separately meter the energy flow in each direction, unless used to implement an electric utility or cooperative tariff approved by the commission for service provided under a net metering program.(4) For electro-mechanical meters, an electric utility or cooperative shall not employ reactive metering 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) For electro-mechanical meters, all electric service of the same type rendered by an electric utility or cooperative under the same rate schedule must 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 must be ratcheted. This rule is only applicable to equipment owned by the electric utility or cooperative.Mich. Admin. Code R. 460.3605
1983 AACS; 2008 AACS; 2019 AACS; 2023 MR 7, Eff. 4/10/2023