Electrical Grease

**Jerry P** · 03-08-2024, 07:13 PM

Does anyone apply dielectric grease to the trailer wiring harness and/or the trailer shore power cable terminals? I've heard yes for corrosion preventative & no because it attracts dirt & grime.
Thanks!

**huntindog** · 03-08-2024, 07:25 PM

Originally Posted by Jerry P

Does anyone apply dielectric grease to the trailer wiring harness and/or the trailer shore power cable terminals? I've heard yes for corrosion preventative & no because it attracts dirt & grime.
Thanks!

Never for my three 30 amp rigs over thirty years.
I have been using it on the 50 amp Momentum. They fit so tight that it is the only way I can do it. I hope they loosen up, as the grease is a pain.

**Second Chance** · 03-08-2024, 08:05 PM

Thread moved to Electrical Systems and Wiring.

Rob

**jkwilson** · 03-08-2024, 08:24 PM

Dielectric=Insulator

**Jerry P** · 03-08-2024, 08:40 PM

Originally Posted by huntindog

Never for my three 30 amp rigs over thirty years.
I have been using it on the 50 amp Momentum. They fit so tight that it is the only way I can do it. I hope they loosen up, as the grease is a pain.

I get it, Thanks.

**Scott'n'Wendy** · 03-09-2024, 07:19 AM

Originally Posted by Jerry P

I've heard yes for corrosion preventative & no because it attracts dirt & grime.
Thanks!

It does both. Helps reduce corrosion, and it's sticky enough to collect dust. It's best used when there is a cover for the connection when not in use.

**Jerry P** · 03-09-2024, 11:09 AM

Originally Posted by Scott'n'Wendy

It does both. Helps reduce corrosion, and it's sticky enough to collect dust. It's best used when there is a cover for the connection when not in use.

I like that thinking. I want to use it to keep connections from being so tight as huntindog stated. Thanks!

**lineman1234** · 03-13-2024, 08:02 PM

Having played with high voltage and secondary voltage for my career of being a lineman. 32 years. I have made quit a few connections.
Clean copper to copper is fine, inhibitor wont hurt. Putting copper inhibitor on a plug that is used often, like the camper feed and the trailer lights is more of a better thing than not. As the inhibitor acts as a lube. Repeating mettle to mettle scraping over time, wears the surface down. Not overnight, but over time.

Aluminum is a must, as it will oxidize fast.

**Jerry P** · 03-13-2024, 08:21 PM

Good info @lineman1234. Kinda confirms my belief that it's better to use especially on stranded copper. I also worked along side lineman for my 46 year career with a Coop. You guys are special, Thanks!

**lineman1234** · 03-14-2024, 09:24 AM

Something people dont think about.
Solid vs stranded, is stranded will make a better connection unless the solid is made exactly for that. Solid wont spread when compressed like stranded wire does, so only connects where it touches instead of compressing like stranded. This is only crimped or mechanical connections, not soldered.
Aluminum has what they call cold flow. As its a softer mettle, it will loosen over time. Copper/brass, is harder and wont per say.

Nothing more fun than standing between 34,500 volts all day.
But i do love being retried....................

Fun fact........... it takes 1.414 volts of AC to equal 1 volt of DC.
Anohter fun fact....... DC uses the hole conductor/wire. AC only uses the outside. Proof is look at substations, the bus bars are pipe, hollow. Its called the skin effect.