October 03 2025

CompEx National Electrical Code – NFPA 70

The international scheme for competency validation and certificate of personnel who work in explosive atmospheres.

Readers may have attended a CompEx course that has covered equipment marking under the ATEX and IECEx systems. Common to the USA, this paper covers equipment that will be installed in a Hazardous (Classified) Location under the Class/Division System of the National Electrical Code (NEC).

To download the National Electrical Code please enter your details below: