Internal switchboard busbars—sometimes called the main busbar or main bus bar of an assembly—are part of a switchgear busbar system verified to IEC 61439-1/-2 (global) or UL 891 (North America). Engineering use: Busbars are common in switchgear, panelboards, substations, busway, battery systems, and industrial power distribution equipment. What controls it:. In most assemblies you will find horizontal main bars, vertical risers, neutral and equipment-ground buses, and purpose-designed supports/insulators that hold everything in place under thermal and electrodynamic stress. They are widely used in industrial, commercial, and residential applications to ensure efficient and reliable. In electric power distribution, a busbar (also bus bar) is a metallic strip or bar, typically housed inside switchgear, panel boards, and busway enclosures for local high current power distribution, transmission, or switching substations.
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