III. EQUIPMENT—METAL-ENCLOSED POWER SWITCHGEAR AND INDUSTRIAL CONTROL ASSEMBLIES


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III. EQUIPMENT—METAL-ENCLOSED POWER SWITCHGEAR AND INDUSTRIAL CONTROL ASSEMBLIES
III. EQUIPMENT—METAL-ENCLOSED POWER SWITCHGEAR AND INDUSTRIAL CONTROL ASSEMBLIES490.30. General. Where the previous sections presented regulations on the individual switching and protective devices, this section covers enclosure and interconnection of such unit devices into overall assemblies. Basically, the rules of this section are aimed at the manufacturers and assemblers of such equipment.Use of all medium-voltage switching and control equipment must be carefully checked against information given with certification of the equipment by a test laboratory—such as data given by UL in its Guide Card information [see discussion at 110.3(B) for details]. Typical data are as …
Citation
Frederic P. Hartwell; Joseph F. McPartland; Brian J. McPartland: McGraw-Hill's National Electrical Code 2017 Handbook, 29th Edition. III. EQUIPMENT—METAL-ENCLOSED POWER SWITCHGEAR AND INDUSTRIAL CONTROL ASSEMBLIES, Chapter (McGraw-Hill Professional, 2017), AccessEngineering Export