| [GMCnet] Today's question [message #344932] |
Fri, 05 July 2019 10:12 |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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For those reading this thread who might well be confused….
On GMC finished coaches, like our former Palm Beach Clasco, GMC supplied a big, thick cord connected to the AC panel inside the small door on the drivers side. That cord terminated with a male 50 amp plug that could either be plugged into the 50 amp female receptacle on the power post at an RV park OR could be plugged into a 50 amp female receptacle mounted inside that small door on the drivers side which is fed by the output from the on-board generator. On the Coachman finished GMCs, like our Royale, a much smaller and easier to handle/store 30 amp cord was used to bring AC power into the coach from a 30 amp female receptacle on the power post at an RV park and they hard wired the output from the generator to back feed the AC breakers in the AC panel inside the coach. The owner had to flip a ganged set of main breakers one way to get power from the RV park power post and flip those same breakers the other way to get power from the on-board generator.
Over the years there have been many, many different ways coach owners may have modified those factory supplied methods of selecting
AC power sources. Some may have used automatic transfer switches, like those used on most large RVs, to select power from the generator when it was running and there was no power coming from the power post at an RV park. We did that with the Royale. In other cases, like what Jim Bounds did when he was Production Manager at Clasco, the big, heavy and hard to store 50 amp power cord was eliminated by adding a spring loaded 30 amp cord reel inside that small door on the drivers side with a 50 amp female receptacle mounted in the center and left a short 50 amp male cord hard wired to the AC panel in the coach. You simply moved that short 50 amp male into either the center of the 30 amp cord reel or into the 50 amp female receptacle containing output from the generator.
To allow two roof mounted air conditioners to run at the same time (which requires more than 30 amps of power) both the Royale and the Clasco modified GMC required the generator to be running to power the second roof mounted air conditioning unit. Bottom line, be sure you know well how your coach is now wired before you assume anything about the AC side of you coach power, especially if you are a new owner. And, dont modify anything about how the AC power is now supplied to your coach until/unless you understand fully how grounds and neutrals are to be handled in an RV as it is different from how grounds and neutrals are handled in home wiring.
Jerry
Jerry & Sharon Work
Kerby, OR
glwork@mac.com
http://jerrywork.com
Now a Prevost Country Coach
Formerly a 78 Royale with most everything done to modernize a GMC mechanically and a
77/94 Clasco that looked like it just left the Clasco facility. Loved them both.
===============
Message: 9
Date: Fri, 5 Jul 2019 06:26:57 -0700
From: James Hupy
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Today's question
Message-ID:
Content-Type: text/plain; charset="UTF-8"
Yeah, Johnny, I know, I know. It was a test to see if anyone reads my
postings? Or, it might be that I sometimes say no when I mean yes, or, I
can't tell a 7/16" wrench from a 10 mm, or last resort,
I can just man up and admit that I was bas-akwards. You are right,
I had it backwards. Inversely proportional to the square root of the speed,
or some other engineer speak. (Grin).
Yes, you are correct, the cords are normalized, It is the receptacle
inside the compartment that is Male, not the ends of the cords. That would
be a dangerous way to do it, for sure. Sorry if I confused anyone.
Jim Hupy
Salem, Oregon
On Fri, Jul 5, 2019, 5:03 AM Johnny Bridges via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Hadda cancel that one. Email folks, I didn't quite understand the
> wording. Sorry 'bout that.
>
> --johnny
> --
> Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> I forgive them all, save those who hurt the dogs. They must answer to me
> in hell
>
>
> _______________________________________________
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Jerry & Sharon Work
78 Royale
Kerby, OR
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