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). A distribution box, also known as a distribution board, electrical panel, or breaker box, is an enclosure that houses electrical components responsible for distributing electricity throughout a building. It receives power from the main electrical supply and divides it into separate circuits, each. 3-phase distribution boards have either 3 or 4 incoming wires and are typically found in commercial and industrial settings. They are often associated with large, power-hungry machinery in continual use, such as elevators, HVAC systems and factory ovens. Your power cables (included per project keywords) must handle the load too. Undersized wires cause: Cable Sizing Rule: For 20A circuits, use 12-gauge wire minimum.
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