Hmm, interesting. I offer DIY advice to the best of my knowledge, but
do not claim to be an expert. Will grab the NEC tomorrow.
As a sysadmin / IT guy going back to the 80s we were paying huge amounts
of money for hardware system maintenance. The computer vendors demanded
certain standards for AC power if you wanted your system maintained. The
in house electricians shrugged it off, but others proved to me you can
have crazy delta-V and other weird effects (60 amps between neutral and
ground) if you don't run pure isolated ground & neutral. None of this
involved an outbuilding, though.
On 3/8/2012 11:14 PM, David Scheidt wrote:
> Nope. Subpanel in a detached structure requires a ground electrode.
> (That can be a ground rod, or other approved real earth ground.) See
> NEC 250.32. That's different from tying the safety ground and the
> neutral together ('bonding'). The ground and neutral are almost never
> allowed to be bonded at the sub-panel (and where you could do it, it's
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