PZ30CB Distribution Box Surface-mounted or flush-mounted with removable cover... Single/three phase: 4/6...12 way PZ30CB Distribution Box 1. Application1) This is an assembly of electro-conductive parts consisting of miniature circuit breakers(MCB) of various ratings,isolator switch,bus-bars,neutral & earth bars, all enclosed in a steel metal case for circuits of single-phase or three-phase.2) ...