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#4512599 - 09/10/17 07:04 PM Proper method to apply dielectric grease...
prs Offline


Registered: 04/15/10
Posts: 93
Loc: West Virginia
... to electrical connections. I know my technique, but I may be a self taught idiot. So, does one slather the grease onto the conductors and plastic, rubber connector surfaces? Or does one only apply the grease to the conductors? Or just to the surface of the male connecter?

My way is to only apply to the male connector's surface that goes into the female, thus sealing the joint. I do not get any on the conductor pins. But which is correct?

prs
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#4512601 - 09/10/17 07:06 PM Re: Proper method to apply dielectric grease... [Re: prs]
leje0306 Offline


Registered: 08/28/16
Posts: 59
Loc: Minnesota
This should be a good one. Dielectric grease stops the flow of electricity. Therefore, do not put it directly on the conductors.

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#4512645 - 09/10/17 07:59 PM Re: Proper method to apply dielectric grease... [Re: leje0306]
gathermewool Offline


Registered: 01/09/09
Posts: 6002
Originally Posted By: leje0306
This should be a good one. Dielectric grease stops the flow of electricity. Therefore, do not put it directly on the conductors.


Huh? Most male and female connections make contact via friction. The connection will displace (scrape) away the grease; the grease will have zero effect on the connection. The benefit of dielectric grease, is that it will keep out moisture and prevent oxidation, allowing the contact to remain corrosion-free.

To the OP, it doesn't matter. I apply a small amount of dielectric grease to the female connector, so that the male will enter, the grease displaced, and a good seal formed.

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#4512659 - 09/10/17 08:21 PM Re: Proper method to apply dielectric grease... [Re: prs]
Warstud Offline


Registered: 09/02/05
Posts: 5405
Loc: MIchigan

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#4512660 - 09/10/17 08:22 PM Re: Proper method to apply dielectric grease... [Re: prs]
SnowDrifter Offline


Registered: 08/24/14
Posts: 391
Loc: WA
Squirt some in either side of the connector and push 'em together

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#4512661 - 09/10/17 08:23 PM Re: Proper method to apply dielectric grease... [Re: leje0306]
SnowDrifter Offline


Registered: 08/24/14
Posts: 391
Loc: WA
Originally Posted By: leje0306
This should be a good one. Dielectric grease stops the flow of electricity. Therefore, do not put it directly on the conductors.


no

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#4512700 - 09/10/17 09:19 PM Re: Proper method to apply dielectric grease... [Re: prs]
AVB Offline


Registered: 05/20/12
Posts: 1283
Loc: Georgia
lol My old boss put dielectric grease on the battery cables of his Semi, then it wouldn't start. He is a smart guy, but didn't realize just what dielectric meant. I had to clean the cables and explain to him what he did.

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#4512701 - 09/10/17 09:22 PM Re: Proper method to apply dielectric grease... [Re: leje0306]
Ducked Offline


Registered: 10/25/12
Posts: 4386
Loc: Taiwan
Originally Posted By: leje0306
This should be a good one. Dielectric grease stops the flow of electricity. Therefore, do not put it directly on the conductors.


Yay! At last a rationale for copper-based anti seize.

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#4512709 - 09/10/17 09:37 PM Re: Proper method to apply dielectric grease... [Re: gathermewool]
HerrStig Offline


Registered: 08/24/11
Posts: 9560
Loc: Boston, MA
Originally Posted By: gathermewool
Originally Posted By: leje0306
This should be a good one. Dielectric grease stops the flow of electricity. Therefore, do not put it directly on the conductors.


Huh? Most male and female connections make contact via friction. The connection will displace (scrape) away the grease; the grease will have zero effect on the connection. The benefit of dielectric grease, is that it will keep out moisture and prevent oxidation, allowing the contact to remain corrosion-free.

To the OP, it doesn't matter. I apply a small amount of dielectric grease to the female connector, so that the male will enter, the grease displaced, and a good seal formed.
This ^ Friction and clamping force will remove the grease from contact points leaving it to seal around them.


Edited by HerrStig (09/10/17 09:38 PM)

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#4512756 - 09/10/17 10:33 PM Re: Proper method to apply dielectric grease... [Re: prs]
JHZR2 Offline



Registered: 12/14/02
Posts: 41802
Loc: New Jersey
Agree regarding friction and clamping force. This stuff has some number of volts/mil standoff of electricity. A connection has intimate contact, so effectively 0mil. So the conductivity is "infinite" (divide by zero), or in practice, no increase in resistance over surface asperities.

I watched the crc video. I suspect they just did what they do for effect... they put a LOT of grease in those connections, which would either glob out or cause the connector to pop back off.

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#4512757 - 09/10/17 10:39 PM Re: Proper method to apply dielectric grease... [Re: leje0306]
Virtus_Probi Offline


Registered: 06/25/15
Posts: 3970
Loc: New England
Originally Posted By: leje0306
This should be a good one. Dielectric grease stops the flow of electricity. Therefore, do not put it directly on the conductors.


Air is also a good insulator, but connectors still work in it because the mating surfaces push it out.
Same with the grease.
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#4512777 - 09/10/17 11:27 PM Re: Proper method to apply dielectric grease... [Re: prs]
SnowDrifter Offline


Registered: 08/24/14
Posts: 391
Loc: WA
Since this thread is turning into false info about you shouldn't apply dielectric grease to electrical connectors, I'm going to nip this in the bud now.

Dielectric grease is designed specifically for electrical connections. It's purpose, to keep moisture and dirt out, It's a mechanical barrier. The reason it's used is if you were to use a conductive grease for electrical components, you would incur leakage current between electrical contacts, leading to electrolysis and corrosion. It keeps moisture out for the same reason. The stuff is designed specifically FOR electrical connections. Don't get hung up on the naming convention.


Edited by SnowDrifter (09/10/17 11:27 PM)

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#4512833 - 09/11/17 01:48 AM Re: Proper method to apply dielectric grease... [Re: SnowDrifter]
user52165 Offline


Registered: 10/21/11
Posts: 1332
Loc: CA
Originally Posted By: SnowDrifter
Since this thread is turning into false info about you shouldn't apply dielectric grease to electrical connectors, I'm going to nip this in the bud now.

Dielectric grease is designed specifically for electrical connections. It's purpose, to keep moisture and dirt out, It's a mechanical barrier. The reason it's used is if you were to use a conductive grease for electrical components, you would incur leakage current between electrical contacts, leading to electrolysis and corrosion. It keeps moisture out for the same reason. The stuff is designed specifically FOR electrical connections. Don't get hung up on the naming convention.


Finally some sanity.

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#4512842 - 09/11/17 03:10 AM Re: Proper method to apply dielectric grease... [Re: prs]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA

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#4512896 - 09/11/17 06:34 AM Re: Proper method to apply dielectric grease... [Re: AVB]
ARB1977 Offline


Registered: 06/12/05
Posts: 5170
Loc: North Texas
Originally Posted By: AVB
lol My old boss put dielectric grease on the battery cables of his Semi, then it wouldn't start. He is a smart guy, but didn't realize just what dielectric meant. I had to clean the cables and explain to him what he did.

I've used dielectric grease on battery terminals for years and never had an issue.
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