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ANSI/NEMA PB 2.1:2007

General instructions for proper handling, installation, operation,and maintenance of deadfront distribution switchboards rated 600 volts or less

Covers floor-mounted deadfront switchboards that consist of an enclosure, molded-case and low-voltage power circuit breakers, fusible or non-fusible switches, instruments and metering, monitoring or control equipment, with associated interconnections and supporting structures.

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NEMA: National Electrical Manufacturers Association [nema]

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