grounding electrode debate

[jimalone]

smallest sizecopper grounding electrode tap for separately derived alt current system for 3 sets of 300kcmil secondary conductors
i say 1/0

freind says 2/0

have older code book not sure

 

[bphgravity]

Re: grounding electrode debate

3 sets @ 300-kcmil = 900-kcmil equivalent.

Per Tabl3 250.66, 2/0 copper GEC required.

 

[allenwayne]

Re: grounding electrode debate

250.66 sizes GEC to largest possible feeder for that amperage rating,Right ???

 

[charlie b]

Re: grounding electrode debate

It's related to amperage, but amperage itself is not part of the equation. All that matters is the cross-sectional area of the phase conductors. I agree with the 2/0 answer.