ARTICLE 647. SENSITIVE ELECTRONIC EQUIPMENT


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ARTICLE 647. SENSITIVE ELECTRONIC EQUIPMENT
ARTICLE 647. SENSITIVE ELECTRONIC EQUIPMENT647.1. Scope.‚ÄÉThis article covers a new 60/120-V distribution system designed to eliminate the effects of electronic noise, originally on audio and video production when this material was a Part (G) in Art. 530, and now in a more broadly applicable format. This system, as shown in Fig. 647-1, uses two ungrounded circuit conductors at a potential of 120 V, and the system secondary is midpoint tapped and grounded to hold the system to 60 V to ground.
Citation
Frederic P. Hartwell; Joseph F. McPartland; Brian J. McPartland: McGraw-Hill's National Electrical Code 2017 Handbook, 29th Edition. ARTICLE 647. SENSITIVE ELECTRONIC EQUIPMENT, Chapter (McGraw-Hill Professional, 2017), AccessEngineering Export