Thanks Cor,
That reminded me that the only time I have used "Marine grade" heat
shrink was in that box. That tubing does have an adhesive lining. That
must have been what migrated.
Tom
On 12/15/2022 8:01 PM, Cor van de Water via EV wrote:
Tom,
Did you use heatshrink on the cables?
I know of many types of Heat Shrink that has heat activated glue
inside to adhere to the cable it is crimped onto, maybe that glue
migrated to the wire strands?
Alternatively, maybe the cable insulation expelled something, possibly
under high temp, which then dried on the connections?
Cor.
On Thu, Dec 15, 2022 at 2:10 PM Tom Jones via EV <ev@lists.evdl.org> wrote:
I have a conversion that has been on the road since 2009. It has a Zilla
1kLV and a Warp9 for propulsion. The traction pack consists of 44 CALB
180 Ah cells for about 150 volts.
The Zilla, hairball, two contactors, breaker and a shunt have been in an
aluminum box for all those years. I recently had reason to open the box
and check connections and see if there was anything going wrong. The box
is not water tight but the contents were dry and generally very clean,
there were no signs of any problems.
When I took apart some of the high current connections, I found them to
be covered with a very sticky clear film. That film was very hard to
remove. Acetone and a lot of rubbing did a fair job of cleaning the
contacts. But, it was not easy. Only the high current contacts had this
problem. Inside the box, no other surface had the sticky film.
So, here is my question, does anyone on this list have any idea about
how that sticky film developed? Or, has anyone else ever seen this issue?
Tom Jones
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