The scope of this Recommended Practice is limited to auxiliary devices associated with motors operating in Division 2 areas, classified as Class I, Groups A, B, C, and D locations. This Recommended Practice is not an attempt to rewrite or otherwise supersede applicable sections of the National Electrical Code (NEC) or any other codes or ordinances. It is intended, rather, to serve as a supplement to existing codes that in this area are not sufficiently specific to serve as a guide to good engineering practice. The guidance contained herein, therefore, is in addition to the NEC requirements for wiring systems for hazardous areas