scope:

This recommended practice is limited to auxiliary devices associated with rotating electrical machines operating in Class I Division 2 and Zone 2 or Class II Division 2 and Zone 22 areas, as classified under the practice of the National Fire Protections Association (NFPA) standard NFPA 70, National Electrical Code(R) (NEC(R)) and the Canadian Standards Association (CSA) standard CSA C22.1, Canadian Electrical Code (CE Code). This recommended practice is not an attempt to rewrite or otherwise supersede applicable sections or clauses of these noted documents or any other codes or ordinances. Rather, it is intended to serve as a supplement to existing codes that in this area may not be sufficiently specific to serve as a guide to god engineering practice.

Purpose:

The following information is intended to bring together a brief description of basic electrical practices with regard to the application and installation of auxiliary devices to rotating electrical machines operating in Class I, Division 2 and Zone 22 or Class II Division 2 and Zone 22 locations using NFPA 70, National Electrical Code(R) (NEC(R)) and CSA C22.1, Canadian Electrical Code (CE Code). It should be understood that this information is only a recommended practice to promote consistent application of such devices and must be used with sound engineering judgment.