Good Sam Club Open Roads Forum: Norcold 1200 operates without ground connected
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 > Norcold 1200 operates without ground connected

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kmb1966

Lake Charles

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Posted: 02/05/20 08:17am Link  |  Quote  |  Print  |  Notify Moderator

I have been working on my Norcold 1200 again and have noticed that the unit will power up and operate when only connecting the 12 volt (+) supply to the rear control board connector labeled "12V". The connector labeled GND can be disconnected totally. Obviously there refrigerator is somehow already grounded somewhere, but I am wondering if this is a problem or is normal??

wnjj

Cornelius, Oregon

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Posted: 02/05/20 08:40am Link  |  Quote  |  Print  |  Notify Moderator

It’s probably grounded through the 3rd pin of the AC power cord and I’m pretty sure it is normal.

kmb1966

Lake Charles

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Posted: 02/05/20 08:54am Link  |  Quote  |  Print  |  Notify Moderator

wnjj wrote:

It’s probably grounded through the 3rd pin of the AC power cord and I’m pretty sure it is normal.

yes, but the only thing I noticed is that it will also operate when the 120 cord is unplugged making the refrigerator go to propane mode.

enblethen

Moses Lake, WA

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Posted: 02/05/20 09:09am Link  |  Quote  |  Print  |  Notify Moderator

It is possible that one of the screws holding the circuit board has a ground connection.
The 120 volt element could be going to ground


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BB_TX

McKinney, Texas

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Posted: 02/05/20 09:09am Link  |  Quote  |  Print  |  Notify Moderator

Is the refrigerator metal frame in any way touching the trailer metal frame? Trailer frame is ground, and the fridge internal 12 v ground may also be connected to the refrigerator frame.

vermilye

Oswego, NY, USA

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Posted: 02/05/20 09:49am Link  |  Quote  |  Print  |  Notify Moderator

Do you have copper propane piping? One of my refrigerators ran on the hot & the propane copper pipe until the broken ground was discovered.


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Chris Bryant

Arden, North Carolina

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Posted: 02/05/20 09:50am Link  |  Quote  |  Print  |  Notify Moderator

vermilye wrote:

Do you have copper propane piping? One of my refrigerators ran on the hot & the propane copper pipe until the broken ground was discovered.


^^^^^^^ This ^^^^^^^


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ScottG

Bothell Wa.

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Posted: 02/05/20 10:21am Link  |  Quote  |  Print  |  Notify Moderator

Chris Bryant wrote:

vermilye wrote:

Do you have copper propane piping? One of my refrigerators ran on the hot & the propane copper pipe until the broken ground was discovered.


^^^^^^^ This ^^^^^^^


Yup, he nailed it!


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kmb1966

Lake Charles

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Posted: 02/05/20 11:23am Link  |  Quote  |  Print  |  Notify Moderator

vermilye wrote:

Do you have copper propane piping? One of my refrigerators ran on the hot & the propane copper pipe until the broken ground was discovered.


yes. that has to be how it is being grounded.

larry cad

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Posted: 02/05/20 12:54pm Link  |  Quote  |  Print  |  Notify Moderator

Probably not a good idea to have electricity flowing through a pipe that is carrying flammable gas


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