I would bond them together.  There will be a ground loop, but if you
don't bond them then neutral will be several or dozens of volts away
from ground - not good.

The problem gets worse with an intermittent or poor ground.  I used an
extension cord to power a computer across a basement once.  The ground
was bad somewhere along the line, and the computer case ended up
floating and giving a nasty shock to anyone who touched it.

If you bond the ground wire, the ground loop stays in wiring and not in
equipment (and people) if you don't bond it then you have a potential
problem since the ground loop may terminate in one of more pieces of
electrical equipment (or they may push ground and neutral further apart).

Treat the remote panel like a regular circuit breaker box - ground rod,
bonded neutral.

I am not a licensed electrician, though, so follow my advice at your own
peril.

-Adam

Matt Redmond wrote:

>Please no flaming about inspectors, etc... that we got off-topic on last time (the 'what cable gauge?' discussion)!  I have another question about wiring my detached garage - this one is about grounding.
>
>The way I read things, I have two acceptable choices when it comes to grounding in the detached garage.  They are:
>
>(a) Run H-H-N-G from main panel to garage.  Do NOT bond N-G in the remote panel.
>
>(b) Run H-H-N from main panel to garage.  DO bond N-G in the remote panel.
>
>In either case the garage gets its own earth ground.
>
>Any opinions on which is the 'betterer' approach.  Any advantages to one over the other?  I'm already going to be running 3-conductor cable + ground - any reason not to use (a)?
>
>Thanks!
>
>-matt redmond
>
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