If you are referring to pt's and ct's integral to "equipment", Rule 2-024 address this. The equipment must be approved. This is performed by an agency such as Entela, CSA or other agencies that are approved to do equipment testing. If you are referring to metering equipment this is addressed in Section 6 starting at 6-400. Is this what you were looking for? The question is a little vague so I wasn't sure.
