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#41410 - 08/25/04 10:42 PM Motor Home Wiring?  
aldav53  Offline
Member
Joined: Aug 2001
Posts: 545
Chandler, AZ USA
I looked at a large Motor Home a customer wants power to. It has a 6-3 w/grd 50a 240v cord on it. I checked the continuity from neutral to ground and no connection. He said he plugs it in to a camp ground with a 3 prong adaptor and it works (2 prong with ground). How would this work if there is no connection to neutral at the motor home panel. And the adaptor has no connection between nuetral to ground on the plug itself. Is there something different about how a motor home is wired?


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#41411 - 08/26/04 12:21 AM Re: Motor Home Wiring?  
NORCAL  Offline
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Joined: Sep 2002
Posts: 872
The neutral and ground are isolated in the panel.


#41412 - 08/26/04 12:45 AM Re: Motor Home Wiring?  
aldav53  Offline
Member
Joined: Aug 2001
Posts: 545
Chandler, AZ USA
But then why would it work when he plugged it in at the camp park? Theoreticly there would be no connection for the neutral.


The Golden Rule - "The man with the gold makes the rule"

#41413 - 08/26/04 01:18 AM Re: Motor Home Wiring?  
caselec  Offline
Member
Joined: Apr 2002
Posts: 558
San Jose, CA
The 3-wire to 4- wire adapter plugs into a 125 volt 3-wire receptacle. It connects L1 and L2 of the motor home together so all 120 volt electrical items will function but you will be limited on how many items that can be used at the same time.

Curt


Curt Swartz

#41414 - 08/26/04 01:22 AM Re: Motor Home Wiring?  
aldav53  Offline
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Joined: Aug 2001
Posts: 545
Chandler, AZ USA
Then how would his 240v A/C work? Something doesn't make sense.


The Golden Rule - "The man with the gold makes the rule"

#41415 - 08/26/04 08:31 AM Re: Motor Home Wiring?  
NORCAL  Offline
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Joined: Sep 2002
Posts: 872
There are no 240V loads in the motorhome* the adapter jumpers both hots so it can be used for 30A 120V service.

* At least in any that I have seen.


#41416 - 08/26/04 12:36 PM Re: Motor Home Wiring?  
aldav53  Offline
Member
Joined: Aug 2001
Posts: 545
Chandler, AZ USA
Yes, that makes sense, I do remember campers being about the only 120v 30a service. The customer said it was 240v, but that is wrong.


The Golden Rule - "The man with the gold makes the rule"

#41417 - 08/26/04 01:12 PM Re: Motor Home Wiring?  
aldav53  Offline
Member
Joined: Aug 2001
Posts: 545
Chandler, AZ USA
Another thought:
The motor home has a 4 prong 240v 50a cord & plug. Without the adaptor, someone could could plug that into a 240v outlet and smoke the MH.


The Golden Rule - "The man with the gold makes the rule"

#41418 - 08/26/04 06:15 PM Re: Motor Home Wiring?  
hbiss  Offline
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Joined: Dec 2003
Posts: 886
Hawthorne, NY USA
Why would that be a problem? Isn't there 2 hots, neutral and ground at the plug?

-Hal


#41419 - 08/26/04 06:56 PM Re: Motor Home Wiring?  
aldav53  Offline
Member
Joined: Aug 2001
Posts: 545
Chandler, AZ USA
hbiss, No there isn't, as I said early there is an adaptor changing it to a 3 prong.


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