Power distribution box is a massive parameter on the data. Generally, it constitutes a low-voltage forest according to the electrical wiring. It is required to assemble the switchgear, measuring instruments, protective appliances and auxiliary equipment in a closed or semi-closed metal cabinet or screen to form a low-voltage power distribution box. During normal operation, the circuit can be switched on or off with the help of manual or automatic switches. The Electric distribution box has the characteristics of small size, easy installation, special technical performance, fixed location, unique configuration function, not limited by the site, universal application, stable and reliable operation, high space utilization, small footprint and environmental protection. Low-voltage cables are used for the incoming and outgoing wires of the distribution box. The selection of the cables should meet the technical requirements. For example, the inlets of the distribution boxes of 30kVA a
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