Busbars are simple in principle, complicated in practice: part 1
The function of the bus bar is direct and clear: to convey power (as high current and/or high voltage) from the source to the load with an acceptably low voltage drop and power loss.
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Principle Lowvoltage Busbar
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A busbar''s main function is to conduct and distribute large electrical currents from one source to multiple circuits within an enclosure, acting as a central, high-capacity connection point.