CSA C22.2 NO. 178.1-07

This Standard covers (a) automatic transfer switches; (b) manual transfer switches; (c) closed transition transfer switches; (d) hybrid transfer switches; (e) transfer switches for fire pumps; and (f) bypass/isolating switches that have a maximum rating of 750 V, are for use in non-hazardous locations in accordance with the Rules of the Canadian Electrical Code, Part I, and enable switching of a power supply from the normal supply to a supply from an alternative source. Note: Rule 32-206 of the Canadian Electrical Code, Part I, requires that transfer switches for fire pumps be approved for fire pump service.