ARTICLE 470. RESISTORS AND REACTORS


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ARTICLE 470. RESISTORS AND REACTORS
ARTICLE 470. RESISTORS AND REACTORS470.1. Scope. Except when installed in connection with switchboards or control panels that are so located that they are suitably guarded from physical damage and accidental contact with live parts, resistors should always be completely enclosed in properly ventilated metal boxes.Large reactors are commonly connected in series with the main leads of large generators or the supply conductors from high-capacity network systems to assist in limiting the current delivered on short circuit. Small reactors are used with lightning arresters, the object here being to offer a high impedance to the passage of a high-frequency lightning discharge and so to aid in directing the discharge to grou…
Citation
Frederic P. Hartwell; Joseph F. McPartland; Brian J. McPartland: McGraw-Hill's National Electrical Code 2017 Handbook, 29th Edition. ARTICLE 470. RESISTORS AND REACTORS, Chapter (McGraw-Hill Professional, 2017), AccessEngineering Export