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NEMA PB 1

1990 Edition, 1990

Complete Document

PANELBOARDS



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Additional Comments:
INCLUDES NEMA PB 1.1:1991
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Description / Abstract:

This standards publication covers single panelboards or groups of panel units suitable for assembly in the form of single panelboards, including buses, and with or without switches or automatic overload protective devices (fuses or circuit breakers), or both. These units are used in the distribution of electricity for light, heat, and power at 600 volts and less with:

a. 1600-ampere mains and less

b. 1200-ampere branch circuits and less

Specifically excluded are live-front panelboards, panelboards employing cast enclosures for special service conditions, and panelboards designed primarily for residential and light commercial service equipment.
ANSI/NEMA MW 1000, 2014