NEMA PB 2-2011

Covers floor-mounted deadfront switchboards rated 6000 amperes or less, 600 volts or less, which consist of an enclosure, molded case circuit breakers, low-voltage power circuit breakers, fusible or non-fusible switches, instruments, metering equipment, monitoring equipment or control equipment, with associated interconnections and supporting structures. These units are used in the distribution of electricity for light, heat, and power.