Blue Book Low-Voltage Electrical Service – Standard E.21-10
This standard sets out the conditions for low-voltage electricity service.
More specifically, it deals with permanent and temporary connections to the overhead or underground distribution system and metering of low-voltage supply. It is designed to provide Hydro-Québec employees, master electricians, consulting engineers and manufacturers with information on implementing or modifying electrical installations.
Blue Book − Standard E.21-10 (10th edition, February 2021) [in French only]