Perhaps the disconnect itself is fauly and creating a direct short when
thrown on? Turn off at breaker disconnect wiring from disconnect and do a
continuity check across both legs off disconnect.
wrote in message
oups.com...
I recently ran a new line for my soon-to-be-delivered hot tub, and
before they hook it up, I wanted to see if someone had an opinion what
I'm seeing right now.

I have a fairly old house, and the main breaker panel was full, so we
installed a "Spa Kit", which was basically a seperate box with a 50-amp
dual pole GFI breaker already included. This runs to a 60-amp
disconnect outside, about 10 feet from the tub, and then there is about
20-feet or so of remaining wire for the install.

Everything seems fine right now, until I throw the disconnect on, at
which point it arcs at the main GFI in the house and trips the breaker
and disconnect hard.

The hook-up seems pretty straight-forward, and I'm not sure what could
be causing this. The bare end for the tub has been splayed apart a bit
to make sure that the ends aren't touching. Is this happening because
I'm not "terminating" the grounding wire at the tub yet??