This document provides specifications for various distribution boxes including dimensions, mounting sizes, and number of ways. Dimensions included are length, width. Wiring diagram shows both PNP and NPN wiring. Actual units use PNP status indicator, NPN status indicator, or neither. It also provides specifications for MB-ABC, MB-AF, MB-AS, and MB-LF series boxes, listing their lengths, widths, heights, and the number of ways (outlets) they. What Is a Distribution Box? A distribution box — also called a distribution board, panel board, or breaker panel — is the central electrical supply hub of any building or facility. It divides incoming power into subsidiary circuits and provides a protective fuse or circuit breaker for each one. The. 4 KV Substation of the ratings indicated above.
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