Author Topic: Change isolation circuit to manual Transfer Switch?  (Read 1469 times)

Offline postman

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  • Posts: 127
  • Its all about prayers and shares
  • I own: a Motor Home
  • Year: 1977
  • Make: Itasca
  • Model: Suncruiser
  • Chassis: Dodge
  • Engine: 440-3
Change isolation circuit to manual Transfer Switch?
« on: November 06, 2017, 12:38 PM »


I have confirmed the Generac Impact 36 is working needs a steel fuel line to the tank. Above is the diagram of the isolation socket in the shore service cable box (drivers side). Has anyone had experience with converting this arrangement to an inside the coach manual transfer switch. Also, any suggestions on the switch.

 i??

Offline tmsnyder

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  • Posts: 595
  • Member since: 2016
  • I own: a Motor Home
  • Year: 1976
  • Make: GMC Motorhome
  • Model: Eleganza II
  • Chassis: GMC
  • Engine: 455
Re: Change isolation circuit to manual Transfer Switch?
« Reply #1 on: November 07, 2017, 08:15 AM »
So you want to select either the generator or shore power with a switch instead of physically moving the plug from one receptacle to the other?

Offline legomybago

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  • Year: 1974
  • Make: FMC
  • Model: 2900R
  • Chassis: FMC
  • Engine: 440
Re: Change isolation circuit to manual Transfer Switch?
« Reply #2 on: November 07, 2017, 10:32 AM »
I don't see why you couldn't just wire in an automatic transfer switch? They aren't very expensive. You just wire your shore power cord to one side, and your generator to the other, then one set of outbound power wires coming out tying back into the system. I've personally never installed one, but I don't think it would be too difficult, as long as your wiring is all in the same compartment. That would be a great upgrade.
Never get crap happy with a slap happy pappy

Offline tmsnyder

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  • Posts: 595
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  • I own: a Motor Home
  • Year: 1976
  • Make: GMC Motorhome
  • Model: Eleganza II
  • Chassis: GMC
  • Engine: 455
Re: Change isolation circuit to manual Transfer Switch?
« Reply #3 on: November 07, 2017, 12:09 PM »
My Holiday Rambler essentially came with this automatic transfer switch.  It's a DPDT relay that energizes when the generator is started up and automatically switches from shore power to generator power.  NO terminals connect to the generator, NC terminals connect to the shore power.


The only funny thing about this relay is there is a time delay built into it.  The generator starts, there is a ~10 second delay, then the relay switches over to the generator.  Give the genny time to get a little warmed up and less likely that it's going to putter off if it can make it through the first 10 seconds.


Offline postman

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  • Posts: 127
  • Its all about prayers and shares
  • I own: a Motor Home
  • Year: 1977
  • Make: Itasca
  • Model: Suncruiser
  • Chassis: Dodge
  • Engine: 440-3
Re: Change isolation circuit to manual Transfer Switch?
« Reply #4 on: November 07, 2017, 02:31 PM »

So you want to select either the generator or shore power with a switch instead of physically moving the plug from one receptacle to the other?


Yes as suggested I have found automatic switches, but concerned about "Failure & or Smoke."






Offline legomybago

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  • Posts: 1178
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  • Year: 1974
  • Make: FMC
  • Model: 2900R
  • Chassis: FMC
  • Engine: 440
Re: Change isolation circuit to manual Transfer Switch?
« Reply #5 on: November 07, 2017, 04:31 PM »

Yes as suggested I have found automatic switches, but concerned about "Failure & or Smoke."
The auto transfer switch in my FMC is from 1975, works great, doesn't have a time delay built into it.
The auto switch in the In-laws 1986 coach works fine, we did have to replace a relay inside it when he first purchased the rig.
I wouldn't be afraid of "smoke", these are installed on all the higher end RV's
Never get crap happy with a slap happy pappy

Offline Froggy1936

  • 13 year member
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  • Year: 1977
  • Make: Winnebago
  • Model: Minnie Winnie
  • Chassis: Chevy G30
  • Engine: 5.7 1995
Re: Change isolation circuit to manual Transfer Switch?
« Reply #6 on: November 07, 2017, 05:34 PM »
I installed an automatic transfer switch on my 77 Minnie The only problem i ever had was a loose connection , But it happened at the same time as a generator renew so it was scary, but easy to diagnose,  Just needed a screw tightened, They are fantastic, No moveing plugs around !  Frank
The Journey is the REWARD !

Offline DaveVA78Chieftain

  • 14 year member
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  • Model: Chieftain
  • Chassis: Dodge M400
  • Engine: 440-3
Re: Change isolation circuit to manual Transfer Switch?
« Reply #7 on: November 07, 2017, 07:24 PM »
Quote
Yes as suggested I have found automatic switches, but concerned about "Failure & or Smoke."

Automatic Transfer switches are common in newer coaches.  Biggest issue with them has been connections getting loose due to road vibration.  Typically the neutral lead.

Offline Froggy1936

  • 13 year member
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  • Posts: 1550
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  • I own: a Motor Home
  • Year: 1977
  • Make: Winnebago
  • Model: Minnie Winnie
  • Chassis: Chevy G30
  • Engine: 5.7 1995
Re: Change isolation circuit to manual Transfer Switch?
« Reply #8 on: November 07, 2017, 07:33 PM »
Hey thats what i said  :D  Frank
The Journey is the REWARD !

 

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