| Transfer switch? [message #356424] |
Sun, 05 July 2020 00:58  |
thigh19
Messages: 92
Registered: July 2019
Location: Vancouver Wa
Karma: 1
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My 73 Sequoia’s generator starts, and runs, but supplies no power to the coach. When i plug in shore power everything works as it should. Doing an internet search, probably dangerous, people are saying “bad transfer switch””. Not knowing enough about the electrical system of these coaches, i could sure use some guidance.
Thanx in advance
Thom High
1973 Sequoia
Vancouver Wa
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| Re: Transfer switch? [message #356425 is a reply to message #356424] |
Sun, 05 July 2020 01:15  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Transfer switches are NOT OEM on a GMC and odds are you do not have one.
Did you move the big Black cable the plugs into the shore power and plug it into the receptical behind the little door where the cable is normally stored?
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Transfer switch? [message #356428 is a reply to message #356426] |
Sun, 05 July 2020 04:51 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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OK, The next thing to check is the a circuit breaker mounted at the very top center on the generator. It could be either a push button or a toggle switch type breaker. Check it with a volt meter looking for 120 volts to ground. Check both sides of the breaker. It is mounted in a little green box and held in place with a couple of bolts. You will have to de-mount it in order to get to the terminals to take a reading.
If there no voltage there then we need to look into the generators itself. The could be a couple of different things that could cause this but let's hold off on this until we decide if it really is not making power.
On side note. If it is indeed not making power, DO NOT touch the circuit board. That board has nothing to do with generating power.
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Transfer switch? [message #356429 is a reply to message #356424] |
Sun, 05 July 2020 07:13 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Let's also remember, if we end up replacing the rectifier, there are 16 possible ways to connect it and only one of them will work. Pay very close attention to where each wire goes, two AC, one + and one -.
--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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| Re: [GMCnet] Transfer switch? [message #356449 is a reply to message #356447] |
Sun, 05 July 2020 23:12 |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
Karma: -12
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If you were to install an auto transfer switch, be sure to get one with DC coils in the contactors. If you don't you'll be driven nuts by the 60 cycle hummmmmm.
Hal
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
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| Re: [GMCnet] Transfer switch? [message #356450 is a reply to message #356447] |
Sun, 05 July 2020 23:07 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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My beloved PO installed an automatic transfer switch that I didn’t realize wasn’t stock for some time.
> On Jul 5, 2020, at 8:52 PM, Jim Kanomata via Gmclist wrote:
>
> Bob,
> None of the Coachman or any other model had an automatic transfer switch.
>
>> On Sun, Jul 5, 2020 at 6:29 PM Ken Burton via Gmclist > gmclist@list.gmcnet.org> wrote:
>>
>> He has got a 1973 Sequoia. I doubt he has a transfer switch.
>> --
>> Ken Burton - N9KB
>> 76 Palm Beach
>> Hebron, Indiana
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
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>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.gmcrvparts.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Transfer switch? [message #356451 is a reply to message #356450] |
Sun, 05 July 2020 23:29 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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I changed all of that stuff when I converted my rear bunks and rear cabinet
into a queen size bed that goes across the access to the breakers and buzz
box. I left the toggle breakers, discarded the buzz box battery destroyer
for a Progressive Dynamics converter. I added an automatic transfer switch,
and the only time I look into the compartment is when I periodically check
for loose connections or leaks or vermin chewing on stuff. My transfer
switch has a built in 30 second delay before connecting to the generator to
allow time for it to stabilize output and frequency. Much better setup for
the way we use the coach.
Jim Hupy
Salem, Oregon
On Sun, Jul 5, 2020, 9:07 PM Larry Davick via Gmclist <
gmclist@list.gmcnet.org> wrote:
> My beloved PO installed an automatic transfer switch that I didn’t realize
> wasn’t stock for some time.
>
>> On Jul 5, 2020, at 8:52 PM, Jim Kanomata via Gmclist gmclist@list.gmcnet.org> wrote:
>>
>> Bob,
>> None of the Coachman or any other model had an automatic transfer switch.
>>
>>> On Sun, Jul 5, 2020 at 6:29 PM Ken Burton via Gmclist >> gmclist@list.gmcnet.org> wrote:
>>>
>>> He has got a 1973 Sequoia. I doubt he has a transfer switch.
>>> --
>>> Ken Burton - N9KB
>>> 76 Palm Beach
>>> Hebron, Indiana
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>> --
>> Jim Kanomata
>> Applied/GMC, Newark,CA
>> jimk@appliedairfilters.com
>> http://www.gmcrvparts.com
>> 1-800-752-7502
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: Transfer switch? [message #356452 is a reply to message #356424] |
Mon, 06 July 2020 05:54 |
94nubble
Messages: 275
Registered: July 2011
Location: Chesapeake VA
Karma: 3
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Senior Member |
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My 77 Royale came with the standard 30 Amp service. When we "Gutted it for renovation" I rewired it to a 50 Amp service. We removed the Propane and went totally electric. With the 50 Amp service we ran a leg down each side of the coach with its own transfer switch. The passenger side is a power center that handles the Air Conditioner, refrigerator (120/12v unit) and the D.C distribution. This way when on shore power each leg is isolated giving us 50 Amps on each side. When the generator is engaged the transfer switches allow for the single leg service from the generator to power both sides of the coach. The driver side powers the Hot Water heater, Microwave and basically all the kitchen appliances.
Tom McManus
1977 Royale
Chesapeake VA
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