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Dielectric vs. Conductive Grease

Top942002

Member
I had to really think about posting this as it can really "stir the pot". Using either dielectric or conductive greases on your electrical connectors is a must to prevent corrosion, arcing and other bad things like fire. I like using NO-OX-ID "A Special" conductive grease on my contacts which includes batteries and power terminals exposed to the elements. I found an interesting information source at www.practical-sailor.com/boat-maintenance/conductive-greases-vs-corrosion/. Basically Dielectric means that it does not conduct electricity but it is displaced from the connection mating surfaces when the connector is plugged in, so it doesn't prevent a connection. The clamping force pushes the grease out of the way. NO-OX-ID is a conductive grease and should be applied carefully to the contacting surfaces to prevent corrosion and lubricate. I started using NO-OX-ID after I tired wrestling my power cord/surge protector connection.
 

George

Well-known member
While the Green Grease was the "best" choice I'll probably stick with the one of the "recommended" choices — Super Lube silicone grease since it's cheap and readily available. I put a bit on the power cord plug and receptacle every so often.
 

M and E

Prominent Member
NO-OX-ID, or similar, is a good choice for RVs. It's minimally conductive but still can improve connection quality. It doesn't have metallic particles like other conductive grease. If anyone chooses to use true metallic conductive grease i would use it in isolated areas only as it is known to cause shorts.
 
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