High voltage circuit breakers

NEMA Publishes Guide for Maintenance of AC Outdoor High-Voltage Circuit Breakers

The National Electrical Manufacturers Association (NEMA) published NEMA SG 11-2013 Guide for Handling and Maintenance of Alternating Current Outdoor High-Voltage Circuit Breakers.

This document provides information on receiving, storage, handling, installation, inspection, and maintenance of alternating current outdoor high-voltage circuit breakers. The requirements of ANSI/NFPA 70B [A4], ANSI/NFPA 70E [A5], ANSI C2 [A1], and applicable OSHA regulations shall be adhered to in connection with any maintenance or operation of high-voltage circuit breakers.

Before performing any work in the vicinity of high-voltage circuit breakers, all conductors shall be first tested to verify the absence of voltage and then grounded using appropriate test equipment and adequate grounding equipment conforming to ASTM F-855 [A7], using appropriate personal protective equipment. Any conductors which are not adequately grounded shall be treated as being energized.

NEMA SG 11-2013 Guide for Handling and Maintenance of Alternating Current Outdoor High-Voltage Circuit Breakers may be downloaded at no cost on the NEMA website or purchased in hardcopy for $66.

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