[A/S] Electrical

> 1c. Re: Electrical Fire
>     Posted by: "Nelson S" westxs1@yahoo.com
> westxs1
> --- In AirstreamList@yahoogroups.com,
> ssnod@... wrote:
> >
> > I have posted photos of an electrical fire in our 1995
> 28' Airstream.  This was found on our way home from
> buying the Airstream.
> >
> > The symptions were: 1.  Battery drain, 
> 2.  Small black flakes on the counter tops.
> >
> > The fix was to replace the 50 amp fuse and mount it to
> the wooden floor.
> >
> > Stanley
> >

> You need to replace the ring lug on one side. You need to
> cut that wire back into the insulation until you find bright
> copper and then re- lug it.  That tarnished wire and
> connector will tend to cause further heat buildup And that
> may very well been the heat source to cause the breaker to
> fail.  I would also put a piece of metal under the
> connection to the floor for a fire barrier. It can't go to
> the negative side anymore but still could cause a fire if
> the breaker fails creating sparks or melting the housing.

> The electrons flow around the outside of each strand of
> wire and with the corrosion you have it could be causing a
> disruption of the electrons
>

Definately cut it back to clean conductor. Check the interior condition of the battery cables at the battery as they have a tendency to turn green and crusty. Treat the physical conncections with NOLOX or a similiar antioxidant.
If you solder the lug use rosin core solder, DO NOT use acid core solder.

It can't hurt to check the other connections in the DC circuitry. If it's nasty at one spot it's possibly nasty at others. Corrosion is not your friend.

When and if you install a heat shield it can be jumpered to the body if you wish to have continuity.

Being pickey, it's DC not RF. DC moves all the electrons through the cross section of the conductor. DC circuits normally use buss bars. Stranded cable is used for flexability.
RF (radio frequency) is where you will find the "skin effect" and stranded wire will give you a greater surface area.
Old trucks,
Old trailers,
DanG 26L20

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