ARTICLE 504. INTRINSICALLY SAFE SYSTEMS


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ARTICLE 504. INTRINSICALLY SAFE SYSTEMS
ARTICLE 504. INTRINSICALLY SAFE SYSTEMS504.1. Scope. This NEC article covers design, layout, and installation of electrical equipment and systems that are not capable of releasing sufficient electrical or thermal energy to ignite flammable or combustible atmospheres.504.2. Definitions.Associated apparatus is equipment that is not necessarily intrinsically safe, but that affects the energy levels in intrinsically safe circuits and that are therefore relied upon to maintain the intrinsic safety of those circuits. An example is an intrinsic safety barrier, such as the one shown schematically in
Citation
Frederic P. Hartwell; Joseph F. McPartland; Brian J. McPartland: McGraw-Hill's National Electrical Code 2017 Handbook, 29th Edition. ARTICLE 504. INTRINSICALLY SAFE SYSTEMS, Chapter (McGraw-Hill Professional, 2017), AccessEngineering Export