jm:

What kind of panel does the wire go back to? Is it a breaker panel, or
an old
fuse box? You may have trouble finding somewhere to attach a #6
neutral
as well as a #6 ground to, say, an old Wadsworth 60A fuse box.

Be aware that the innards of an old fuse box may have deteriorated over
the
years. Be very aware that, even if you pull out the main
fuse block or turn the main breaker to OFF, the service wires (the
large ones
that come into the house) and the lugs, screws, and whatever attaches
to them
are all very much alive and capable of electrocuting you or explosively
vaporizing
the end of an insulated screwdriver, throwing bits of metal in your
direction.
It's very wise to wear goggles when working in a panel.

Also remember that the terminals must be properly tightened, neither
too
tight nor too loose.

Maybe you know all this stuff already. I just want to point out that
wiring is
not something that should be learned from the people at Home Despot,
and
it's better to learn this some way that doesn't involve making a big
BANG and
a blue flash.

Cordially yours:
G P