Lightning Revisited [RE-wrenches]

[Allan Sindelar]

Bill,
I see a possible problem with your recommended solution. The separate
structures provision also requires a separate single-point bond in each
"structure" between grounding conductor and a grounded conductor. On the
three-phase wild AC of many wind generators, what would be the grounded
conductor (the equivalent of AC neutral or DC negative)? Have I missed
something here?
Allan at Positive NRG

----- Original Message -----
From: "Bill Brooks" <billbrooks7 at earthlink.net>

> What about employing the grounding of separate structures provision in NEC
> 250-32 (2002 code)? If there is a grounded conductor, then that conductor
> should be grounded at the tower (or PV Array for PV) and at the service
> entrance with no ground wire between them and no metalic conduit. All
> ungrounded conductors must have surge protection (Phasor, Delta, voodoo).
> The main issue is that you cannot touch the tower or module frames while
> touch something connected to the house. The inverter, however, is working
> with conductors that are all referenced to the same grounding system.

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