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This configuration appears to display two violations of the current U.S. National Electric Code: the main panel does not have a grounding conductor (here it is fed through the subpanel instead) and the subpanel neutral bar is bonded to the ground bar (these should be separate bars after the first service disconnect, which in this case is the ...
A shorting bar connecting ground and neutral in Swiss industrial building (outlined in red). A hunk of copper is visible that is designed to be easily connected or disconnected from its place between two screws, rated for 600 A (as stamped on it).
In Australia and New Zealand the connection between the protective earth bar and the neutral bar at the main Switchboard/Panel is called the multiple earthed neutral Link or MEN Link. This MEN link is removable for installation testing purposes, but is connected during normal service by either a locking system (locknuts for instance) or two or ...
The neutral is connected to the center tap of the power company transformer of a split-phase system, or the center of the wye connection of a polyphase power system. United States electrical codes require that the neutral be connected to earth at the "service panel" only and at no other point within the building wiring system.
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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. They are also used to connect high voltage equipment at electrical switchyards, and low-voltage equipment in battery banks .
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The failure of a neutral fuse would cut off power flow through the affected circuit, but the hot conductor could still remain hot relative to ground, an unexpected and potentially hazardous situation. Because of the presence of a neutral fuse, and in the event that it blew, the neutral conductor could not be relied on to remain near ground ...