[TowerTalk] Challenging Grounding/Bonding Situation ?

[Jim Brown]

On Fri,9/12/2014 4:39 PM, Bill Turner wrote:
> I'm not an electrician but I'm pretty sure that is not according to
> code. You should have four wires, not three, going from the house to
> the shack:  Two hots, a neutral and ground. Having no ground in the
> shack is asking for trouble. And I do NOT mean a ground rod in the
> shack - I mean a green ground wire from the service entrance to the
> shack.

The system I described is legal per the latest NEC I have from my 
working days designing sound systems (about 2003, I think). I looked it 
up before I did it.

There is nothing "magic" (or even desirable) about carrying ground from 
one building to another, or even from the utility. The utility brings us 
center-tapped 240. The center tap goes to earth along the power system 
at multiple points, but it's rarely much of a ground. AND there's a lot 
of inductance between that ground and ours.

73, Jim K9YC