Circuit panel question

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Old 10-17-04, 06:55 AM
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Circuit panel question

What is the difference between the ground bar and the neutral bar? I ask because in my panel I have neutral and ground wires going to the same bar. In fact, both bars seem to be a mix of both.
Thanks,
Steve
 
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Old 10-17-04, 10:29 AM
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In your panel there is no difference.

In a residence, the neutral wire must be grounded in one place only, and one place only. This is usually (but not always) the main electrical panel. As is the case in your situation, there are two bars needed for neutral and ground connections. Since the main panel is where the neutral and ground are connected together, the bars are interchangeable.

In a sub panel in a residence it it necessary to keep the neutrals and ground wires separated. This is why the sub panel is wired with a four wire cable, and supplied with (or has added to) two separate bars, one for grounds, one for neutrals.
 
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Old 10-17-04, 11:46 AM
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Thanks for the info.
 
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Old 10-17-04, 11:51 AM
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The Neutral conductor of a 110/220 volt 3-wire Service-system is required to be Grounded and thus becomes the Grounded Service- Conductor. The Neutral conductors of the interior circuits that extend from the Service panel become the GROUNDED Circuit-conductors by connection to the Service Neutral.

All these Neutrals are classified as "Identified Conductors" and are required to be identified by the color White and NO OTHER color.

The Equiptment GROUNDING Conductors ( often a bare wire) of ALL interior circuits connect to the Grounded Service Conductor, "directly" if the circuits extend from the Service-panel, and "indirectly" if the circuits extend from a panel seperate from the Service panel.

The "indirect" Grounding connection to the Service Neutral/ Grounded conductor is effected by an approved Equiptment Grounding Conductor between the two panels which is seperate and isolated from all connections to any Grounded Conductors at any point beyond the Service panel.
 
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