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ANSI/ISA TR12.12.04-2011

Electrical Equipment in a Class I, Division 2/Zone 2 Hazardous Location

A location in which the fire or explosion hazard exists infrequently and for short periods is designated as a Division 2 or Zone 2 location. Two of the primary protection techniques for Division 2 or Zone 2 locations are "Nonincendive equipment" or "Non-sparking equipment". This Technical Report is intended to explain these protection techniques and to clarify the associated terminology. This Technical Report also addresses field wiring for Division 2/Zone 2 locations.

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The International Society of Automation [isa]

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