AC dead short?

[sfedeli3]

Hi John,

Is there any chance that you have driven a screw into the wire runs
somewhere? If you are handy with a multi-meter, you should check for
continuity in each conductor from the electric panel to the outlet.
(with ALL power off, of course) It is also possible that after 20
years, one of the extra-long screws that bluebird uses finally wore
through some wire insulation somewhere. It is also possible that one
of the wires in an outlet box came loose and is shorting against the
side of the outlet box.

If you are returning to SD later this month and don't mind a stop in
Hershey, I'd be happy to help you trace out the circuit and find the
short. Probably wouldn't take more than a few hours.

Shane Fedeli
85PT40
Hershey, PA

. --- In WanderlodgeForum@yahoogroups.com, "John Ely"
wrote:
>
> I have just developed a dead short in two circuits of my AC
system.
> The front receptacles and the vacuum cleaner circuits appear to be
> dead shorted. If they are on, the park circuit breaker (30 amps)
> trips. If they are off, I get normal service from the park. The
> thing these two circuits have in common is the AC meters on the
> dinette control panel. The front receptacles circuit provides
power
> to one of the dinette AC meters while the vacuum cleaner circuit
> provides power to the other. I have removed all loads from both of
> these circuits with no change. I've pulled the cover from the
breaker
> box and these breakers have only one 12ga. wire going to them, so
the
> meters must be wired in downstream somewhere, but I have no idea
where
> or even where to look. As a possibly related matter, about two
weeks
> ago, after a lightning storm near Montreal, I noted that the
polarity
> indicators in my service box (the place where shore power is
> connected) are no longer working. As there are also polarity
> indicators on the dinette panel, there is a possible likage here.
> However, there was a two + week span of normality between the loss
of
> polarity lights in the service box and the short circuits in the AC
> panel. No incident occurred prior to the AC loss; it worked fine
in
> one park, we took a long (15 hour ferry ride) with the DC systems
shut
> down, and had the shorts as soon as I plugged in at the next park.
> If anyone has any ideas as to what this might be, I'd be glad to
hear
> them.
> John Ely, 86PT40, Rapid City, SD On the road in Clarke's Beach,
> Newfoundland
>