"nigel" wrote in message
ups.com...

I imagine this is only a problem with plastic tubes/conduits ... metal
would seem to be proof against the whole thing.
What do the experts have to say on this?

You can ground the system if you have problem with getting shocks from it.
Its not necessary, from a safety point of view. I liive in Houston where
the humidity is relatively high and I have no problems at all running
ungrounded.

Bob