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NECA 409-2009

Standard for Installing and Maintaining Dry-Type Transformers (ANSI)

Describes installation and maintenance practices for dry-type, two-winding transformers used for supplying power, heating, and lighting loads for commercial, institutional, and industrial use in nonhazardous locations, both indoors and outdoors. NECA 409 is approved as an American National Standard (ANS).

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National Electrical Contractors Association [neca]

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