4-circuit incoming lines to the distribution box
The service entrance diagram refers to the layout and configuration of the wiring system used for this purpose. It takes the incoming power and safely distributes it to different circuits throughout your building. 1) Generally, the incoming line of power distribution box adopts five wire system, that is, a, B and C three-way phase line (the general color is yellow, green and red), one way zero line (the color is light blue) and one way ground line (the color is yellow with green stripes). The distinction between 1P and 2P circuit breakers plays a pivotal role in determining the appropriate protection level for various circuits.
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