Featuring a transparent enclosure, this set includes a 220V meter, a 2P circuit breaker, and a leakage switch. PREMIUM CONSTRUCTION POWER DISTRIBUTION BOX: Crafted by WESTERN, the 6506TLSX Temp power box features a durable blend material for long-lasting performance in demanding environments. Shop. The power distribution boxes deliver electricity from the main electrical main to other circuits. Main Distribution Board (MDB) 2. Unitized Panel. Before using a multimeter to detect the leakage of the power distribution cabinet or distribution box, we must first look at the fault phenomenon and obvious features in the distribution box; secondly, observe whether there is an intuitive fault point from the surface, and then proceed to the next. Residual-current switches, meanwhile, detect current leaks and cut off the power supply if an anomaly is detected, protecting people from electric shock. Ideal for managing electrical power efficiently and. Leakage protector must be installed in the main distribution box (distribution box) and switch box, and the selection of rated leakage action parameters shall comply with the following regulations: (1) The rated leakage action current of the leakage protector in the main distribution box shall be.