[Amps] 4 wire 240VAC service? What to do now?

[Paul Christensen]

> Being that it is only 120 volts you have a hot, neutral and a ground wire
> run out there. You should have the ground wire from the main panel 
> connected
> to the ground buss in the sub panel along with the local ground rod out
> there. Do not bond the neutral to the sub panel ground.

I realize this is drifting OT but I had a situation several years ago where 
an isolation transformer was used at a remote building.  In that case, I 
believe the NEC addresses the distribution as a separately derived system 
and as an exception to the general rule, neutral would bond with ground in 
the remote building's panel.  I don't recall is ground must be pulled from 
the main building in such a system if there's no direct conductor path 
across the transformer.

Paul, W9AC