In message , Nick
Smith writes

Before connecting, spray both connectors with WD40 (has negligible
effect on signals). Connect. Wipe off WD40 (on outside, of course). Wrap
tightly and neatly with self-amalgamating tape. Spray again with WD40.
Will last for ever.
Ian.

Ian,

Surely the WD40 should not be applied to the electrically connecting surfaces ?
Isn't oil an insulator ?
And I wouldn't be happy leaving self amalgamating exposed to the sun - overwrap
in plastic insulating tape as well with the outermost layer not wrapped
under much
tension to stop the tape unwrapping itself when baking in the sun.

Nick



Nick,
I can't say I've noticed any tendency for WD40 to insulate the
contacting surfaces of connectors (not that I do this very often). There
should normally be sufficient pressure for the contacts to punch through
the oily layer. I reckon that WD40 will be similar to 'Lectrolube' and
similar switch cleaner-lubricants which leave a lubricating layer. Maybe
switch cleaner could be used instead of WD40, but it must be
lubricating, and not just cleaning.

However, I did once have a problem with the points in the ignition
circuit in a car. I put a little too much grease on the cam, and it
eventually worked its way along to the actual contacts. It proved a
surprisingly effective insulator!

As for the effects of sunlight on self-amalgamating tape...
Again, I haven't noticed any obvious deterioration, but the '.co.uk'
part of my e-mail address may offer some explanation! I wouldn't use PVC
tape to overwrap it - PVC always comes adrift eventually. The
old-fashioned black fabric-based electricians' tape would probably be
OK, provided you secure the end with superglue (another sovereign
remedy).

Cheers,
Ian.

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