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NEMA GD 2

2016 Edition, January 1, 2016

Complete Document

Evaluating Fire- and Heat-Damaged Electrical Equipment



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Description / Abstract:

This publication serves as a guideline that represents the consensus of NEMA member companies and is not intended to override the recommended guidance of the specific equipment manufacturer. These guidelines provide information on how to evaluate electrical equipment that has been exposed to heat and fire residue through fire, firefighting activities, or close proximity to a fire. It is designed for use by suppliers, installers, inspectors, and users of electrical products. Where additional information is required, it is recommended that the specific electrical equipment manufacturers be consulted. Evaluation of electrical equipment should be conducted by qualified personnel. Electrical equipment exposed to heat and fire residue can be extremely hazardous if re-energized without first performing a proper evaluation and taking necessary action. Reduction in the integrity of electrical equipment due to heat degradation of materials, residue from burning materials, or moisture can affect the ability of the equipment to perform its intended function and be used safely. Damage to electrical equipment can also result from airborne contaminates containing chemicals and other debris, which can affect the integrity and performance of the equipment. Smoke and soot from burning materials can be particularly damaging because of the corrosive and conductive nature of the residue. Damage caused by fire-suppression activities, structural damage, and weather exposure must also be considered. Distributors of electrical equipment should not supply any inventory that has been damaged by fire or heat. Doing so can lead to the use of damaged equipment that may not function correctly, creating a hazard to individuals or property.

ANSI/NEMA MW 1000, 2014