Grounding/Bonding Panelboard/switchgear housing

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tgammon

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Hi,

I am not a practicing electrician. (I am telling you so the ignorance of my question does not scare you.)

I would like to know what the NEC grounding or bonding requirements are for panelboard housings, switchgear housing, and transformer enclosures. If you can suggest where to look in the NEC, I would appreciate the information.

Thanks,
 
More questions about grounding and bonding

More questions about grounding and bonding

Thanks, I have looked through Article 250.

I would really appreciate some discussion on this topic.

Are equipment enclosures such as panelboards and switchgear typically grounded or bonded and what methods are commonly used?
 
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Pretty wide open question.

A residential load center is often bonded by installing a factory provided screw through the neutral bar and into the cabinet.

Service switch gear usually has a removable section of bus bar that is installed from the neutral bus bar to the grounding bus bar

With transformers usually the electrician installs a wire type conductor from the XO terminal to a foot lug installed on the transformer enclosure or some like to do this in the first disconnecting means after the transformer, the NEC allows either.
 
Clarification

Clarification

I am interested in how the grounding/bonding is typically done in panelboards and switchgear in 480 V systems.

Is equipment usually connected to a grounding conductor directly or to a neutral?

Thanks,
 
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