[Dunngeon]

Originally Posted by InFlight

There are quite a few Gold on Gold, or Silver on Silver contact designs that don't contain Mercury. The Wind turbine industry has lots of low cost high current options.

http://www.amazon.com/Sunwin-Wires-2...ords=Slip+ring

Company Specs
http://www.moflon.com/mw.php?a=1

Just one option, lots of other low cost (no-mercury) models. Moog would be nice, but really expensive.

That slip ring you linked is only rated for 30A per the website, FRC rules require that it be rated for 40A if it's on the 40A breaker. I wouldn't want to put it on the 20A, for obvious power reasons. Which is why I've been looking for a low cost 40A Slip Ring. Unfortunately, I haven't been able to find any legal ones.