ANSI/ISA 12.01.01-2009
This document provides definitions and information pertaining to protection techniques, terminology, and the installation of electrical equipment in hazardous (classified) locations and provides an introduction and basic background to the ISA12, Electrical Safety, series of publications and committee activities. It replaces ANSI/ISA-12.01.01, Definitions and Information Pertaining to Electrical Instruments in Hazardous (Classified) Locations, published in 1999.