Electrical Exam Term
Busbar
A metallic strip or bar inside a panelboard or switchgear that serves as a common connection point for multiple circuits.
Detailed Explanation
Busbars distribute power from the main breaker to individual branch circuit breakers. They are typically made of copper or aluminum. In a standard residential panel, there are two hot busbars (each carrying 120V), a neutral bus, and a ground bus. The hot busbars are arranged so adjacent breaker slots are on opposite phases, providing 240V when two adjacent breakers are used together.
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Practice QuestionEasy
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