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 > Burnt wires in power distribution panel

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wolfe10

Texas

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Posted: 11/25/20 01:45pm Link  |  Quote  |  Print  |  Notify Moderator

wolfe10 wrote:

QCMan wrote:

Odds are they are all loose or were before you tightened them. Loose connections = higher resistance = high temps = burnt wires.


I agree. MUCH more likely that a random power surge causing the excessive heat that destroyed the insulation on all of them.



Sorry, in my post one letter incorrect made my post on page one confusing/contradictory.

First sentence of my reply--I agreed with his conclusion (did then, still do!).

But, the "that" in the next sentence should have been "THAN", as "that" contradicts my agreeing with his statement. Thanks, fat fingers.

SO: Here is what my post should have said: "I agree. MUCH more likely THAN a random power surge causing the excessive heat that destroyed the insulation on all of them."

Again, sorry for the confusion.


Brett Wolfe
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Ex: 1997 Safari 35'
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MEXICOWANDERER

las peƱas, michoacan, mexico

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Posted: 11/25/20 02:30pm Link  |  Quote  |  Print  |  Notify Moderator

Non accuracy due to having a keyboard the size of a Saltine cracker

BeeBee

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Posted: 11/25/20 04:05pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks to all the members who replied on this issue. Such a wealth of knowledge and experience on this forum! I am going to go through the entire panel for loose and/or corroded wires, and will be cutting off and reattaching the burnt ends. I'll be monitoring this closely in the future to make sure it does not redevelop. Last thing we need is a fire in the trailer!

Cummins12V98

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Posted: 11/26/20 05:25am Link  |  Quote  |  Print  |  Notify Moderator

I HIGHLY suggest turning off the AC power and tightening EVERY electrical connection possible. This also applies to cords with twist locks and their receptacles.


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DrewE

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Posted: 11/26/20 10:49am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:


So is it possible there was one loose wire and the heat moved on the bus to discolor the other wires?


It's entirely possible. Generally when that's what has happened it's pretty clear which connection was loose as that wire is the most burnt one, and the ones adjacent are the next most toasted ones, etc.





enblethen

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Posted: 11/26/20 11:11am Link  |  Quote  |  Print  |  Notify Moderator

The one that could cause heat along the buss is the main neutral It should be the largest wire which is farthest left in photo. I would normally put this wire in the center of the buss as a personal favorite.


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2oldman

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Posted: 11/26/20 01:27pm Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

I HIGHLY suggest turning off the AC power and tightening EVERY electrical connection possible. This also applies to cords with twist locks and their receptacles.
Yes.. the screws that attach the 30a cable to the plug. PITA to check, but when they work loose things get hot.

Cummins12V98

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Posted: 11/26/20 02:49pm Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

Cummins12V98 wrote:

I HIGHLY suggest turning off the AC power and tightening EVERY electrical connection possible. This also applies to cords with twist locks and their receptacles.
Yes.. the screws that attach the 30a cable to the plug. PITA to check, but when they work loose things get hot.


Nad a neutral come loose and fall onto a hot. Caused Microwave and a couple other things to have 220V. Side effects were not good!

CharlesinGA

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Posted: 11/26/20 09:45pm Link  |  Quote  |  Print  |  Notify Moderator

BeeBee wrote:

Thanks all for the replies. Is an "ATS" the "transfer switch" ? Is that the switch that switches from DC to AC? Where might I find that in my travel trailer?


Read thru the thread and saw that no one ever answered this. The ATS is a switch that allows shore power 120v to your panel and then when an onboard generator is started, it shuts the shore power off and allows the generator power to take over.

The ATS has NOTHING to do with DC 12v power.

If you have a motorhome with a generator you might have an ATS or you might simply have an outlet for the generator that you roll up the shore cord in its compartment and plug it into the generator outlet (manual transfer switch of sorts).

If you have a trailer and no onboard generator you won't have a ATS. If you have a built in generator you might or might not have an ATS or the outlet and plug setup I described above.

Charles

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