In article , Bud-- wrote:
John Grabowski wrote:
"Stormin Mormon" wrote in message
...

CY: The grounds and neutrals go to different bars. Beyond that I
don't know.

The neutral bar should be insulated from the box. It is possible there
is a bonding jumper from the neutral bar to the box. Sometimes a very
visible strap. Sometimes a very non-obvious screw - usually green.

And that could do it, too -- leaving that screw in, I mean, when it should
have been removed.
[...]

Not obvious if you are saying there is no grounding electrode at the
shower building. It is code required. Rods are notoriously poor, but the
easiest if an electrode is not now present. Code is 8' (as someone said)
and 2 are usually installed.

Actually, Code is 8' or to the depth of permanent soil moisture, whichever is
deeper. [Article 250.53(A)]

A slight possibility - if you have no grounding electrode and have a
neutral-ground bond in the panel, the shower ground wires would lift
from earth potential. Adding a furnace could provide a path from the
shower ground wires to the shower valve.

True, but not by itself sufficient to cause the observed problem. Apparently
the water pipes in the shower building are not properly grounded either. Code
requires metal water piping to be bonded to the electrical grounding system,
to ensure that there won't be any potential difference between the water pipes
and ground.

[...]
Also not established - separate shower buildings for girls and boys?
Could explain why girls get shocks, not boys. As a temporary fix you
could have the girls shower with the boys.

Even more shocking. g

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.