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NEC 250.54 Auxiliary Grounding Electrode.

Posted by jea48 (A) on June 1, 2015 at 17:02:40

In Reply to: RE: double ground posted by moray james on June 1, 2015 at 14:13:38:

Quote.
One or more grounding electrodes shall be permitted to be connected to the equipment grounding conductors specified in 250.118 and shall not be required to comply with the electrode bonding requirements of 250.50 or 250.53(c) or the resistance requirements of 250.53(A)(2) Exception, but the earth shall not be used as an effective ground fault current path as specified in 250.4(A)(5) and 250.4(B)(4).

Plain English you can install all the Aux grounding electrodes you want. Use any size grounding wire you want. Any type, any length earth grounding electrode you want. BUT it has to be tied to the existing branch circuit safety equipment grounding conductor that is connected to the ground bus in the electrical panel the branch circuit is fed from.
...the earth shall not be used as an effective ground fault current path as specified in 250.4(A)(%) and 250.4(B).

Does lightning love an Auxiliary Grounding Electrode? You bet!

• https://www.youtube.com/watch?v=WlnFNTay-9Q   (Open in New Window)

Edits: 06/01/15 06/01/15 06/02/15 06/02/15

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