Distribution box outgoing line to load
① 220V load generally takes one phase line, one zero line and one ground line. )Trace the outgoing line circuit: Analyze the outgoing line circuits of the distribution box one by one, understand the load equipment and protection method of each circuit, and ensure that each load can be reliably powered and protected. And all the switching and protective devices are installed in the distribution box. Whether you have a new or existing facility, the single-line diagram is the vital roadmap for all future testing, service and maintenance activities.
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