On Tuesday, August 18, 2015 at 7:02:20 PM UTC-7, Jeff Liebermann wrote:
On Tue, 18 Aug 2015 16:58:50 -0700 (PDT), whit3rd
wrote:

... some greases are intended for electrical conduction in thin
films (they 'break down' at millivolts, and don't even get hot).
http://store.caig.com/s.nl/sc.2/category.185/.f
I've used this grease on rotating connections, at 40A it's just like
a solid wire connection.

Looks like aluminum dust, copper dust, graphite, and/or quartz(???).

Can't be, it's transparent. It's based on a semiconductive component, which is nonlinear:
insulating in bulk, but breaks down (in conductivity, not chemical nature) in
thin films under electrical stress. US Patent #4696832 has more info.

Never heard of that stuff, but if it's as you describe, it should be
quite useful. How conductive, I don't know. The patent isn't very
helpful:
http://www.google.com/patents/US4696832

Yeah, there's a high information cost... and there's more boosterism than
chemical physics in the sales lit. As to 'how conductive', the L260 variant
that I used doesn't have conductive particles, so it only conducts in thin films,
like rubbing parts would have around contact points. Because it is nonlinear,
'conductivity' is undefined (and the rubbing of bumpy surfaces mean
the film thickness is likewise indefinite). Variants on this lubricant
are recommended for slide potentiometers, I see.

The admixture of conductive particles would make a grease conduct electricity,
but that would be unsafe in electrical panels (and the intended uses include busbars).
It would decalibrate potentiometers, too. Because metallic particles would
constitute dissimilar metals in my mechanism, I didn't want to use such a grease.