Red Book

Medium-Voltage Electrical Service
Standard E.21-12 (2^nd edition)

This standard sets out the conditions for medium-voltage electricity service. It applies to any application for service or any modification of an electrical installation that might either increase a customer's contract power or connected load or affect the power quality of the Hydro-Québec grid.

• Standard E.21-12 (2nd edition) [PDF – 4,4 Mb – In French only]