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docsouce

Seekonk Ma.

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Posted: 03/20/21 04:24pm Link  |  Quote  |  Print  |  Notify Moderator

I have a bird's nest on ground wires under my 2020 Jayco 26xd class C. One of the many things I want to do is clean this mess up. Probably about 15, looks like #12 white wires coming out of the house to 2 bus bars that have 2 or 3 wires going to each terminal. The bus are anchored to the frame which I assumed is the grounding point. Anyway it's a mess. My question should I continue to use the bus bars with groups of wires going to one terminal or should I pick up a couple of multi point bus bars and use one wire to one terminal?? As always all advise is appreciated.


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BFL13

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Posted: 03/20/21 05:00pm Link  |  Quote  |  Print  |  Notify Moderator

IMO leave it be. It is normal to have a bunch of "grounds" going together to the frame. At least they used buss bars. Some RVs use extra big wire nuts for that job.


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Ed_Gee

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Posted: 03/20/21 05:17pm Link  |  Quote  |  Print  |  Notify Moderator

I have always thought of ground wires as GREEN. WHITE wires signify a neutral line. Now sure exactly why you have a bunch of any of that coming out of your RV house bottom, but I agree with previous poster.... leave them alone. At least until you know exactly what their function is.. Sure as heck wouldn't recommend messing with neutral wires... which may or may not be bonded to your chassis.


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RJsfishin

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Posted: 03/20/21 05:26pm Link  |  Quote  |  Print  |  Notify Moderator

Theres nothing wrong w/ several wires going into 1 terminal.


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BFL13

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Posted: 03/20/21 05:31pm Link  |  Quote  |  Print  |  Notify Moderator

His collection of white wires are for 12v IMO, and should be called "negative" wires, but that does not matter much. Somewhere else on the frame will be the actual "ground" wire connection for the RV's 120v system.

The RV's 120v and the 12v systems share the frame for that. On the 120v side, the real ground (Earth) is back at the 120v pedestal supply where it is bonded to the "neutral" while out at the RV the "neutrals" are on a neutral buss NOT bonded to the "ground" going to the frame.

opnspaces

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Posted: 03/20/21 05:32pm Link  |  Quote  |  Print  |  Notify Moderator

Wire colors in an RV can be a bit of a guess. But in general the manufacturers use white wires for the 12v grounds in the house portion.

I third leaving them alone.


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enblethen

Moses Lake, WA

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Posted: 03/20/21 06:19pm Link  |  Quote  |  Print  |  Notify Moderator

Clean them up good, coat the lugs and wiring terminations with electrical de-oxidation grease and leave as is.


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docsouce

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Posted: 03/20/21 08:09pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the input. I'll just bundle them up a bit so they aren't hanging all over the place, grease them up an let them be.

theoldwizard1

SE MI

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Posted: 03/21/21 07:13am Link  |  Quote  |  Print  |  Notify Moderator

One buss bar is always better.

Also, it is better to run grounds all the way back to the buss bar from each load.

dougrainer

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Posted: 03/21/21 07:56am Link  |  Quote  |  Print  |  Notify Moderator

Ed_Gee wrote:

I have always thought of ground wires as GREEN. WHITE wires signify a neutral line. Now sure exactly why you have a bunch of any of that coming out of your RV house bottom, but I agree with previous poster.... leave them alone. At least until you know exactly what their function is.. Sure as heck wouldn't recommend messing with neutral wires... which may or may not be bonded to your chassis.


White Wires on 95% of RV's are 12 volt GROUND. Winnebago was one that used Green for 12 volt ground. NEUTRAL Romex wires should be solid core. 12 volt will be stranded wires. 120 Power cord and Genset 120 output will be stranded. Doug

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