The primary role of a distribution box is to take the main incoming supply and divide it into smaller circuits. Each outgoing line can be individually controlled, making it possible to isolate or maintain one section of the system without disrupting the whole. Understanding its significance. A switchboard is a large single panel, frame, or assembly of panels on which are mounted (on the face, back, or both) switches, overcurrent and other protective devices, buses, and usually instruments. Panelboards supplied by a 4-wire, delta-connected, three-phase (high-leg) system must have. Understand the key differences between distribution boards and boxes—functions, applications, safety, cost, and when to use each one. What is a Distribution Board? A distribution board —also called a panelboard, breaker panel, or electrical. 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.
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