What size awg grounding for a 350amp service panel?

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What size awg grounding for a 350amp service panel?

2007-03-22 04:26:44 · 3 answers · asked by David S 1 in Science & Mathematics ➔ Engineering

3 answers

I don't have a copy of the NEC but I'll take a stab at 4/0??

2007-03-22 04:36:15 · answer #1 · answered by Fordman 7 · 0⤊ 0⤋

Bare aluminum type AA, 00 gauge is rated for 215 Amps.

0 gauge is rated for 185 Amps, that's about 1/2 the panel rating.

You really should consult the National Electric Code (2005 is the latest edition).

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2007-03-22 13:20:28 · answer #2 · answered by tlbs101 7 · 0⤊ 0⤋

Without the table, rule of thumb for 3 ph. and 1 ph. systems. Halve the size of the largest conductor used.

2007-03-22 11:50:51 · answer #3 · answered by mad_jim 3 · 0⤊ 0⤋