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#15704 - 10/25/02 11:23 AM Silicone on cables  
SJT  Offline
Joined: Jul 2002
Posts: 241
As a precaution I've used silicone on the bottom of a meter, where the bottom drop enters. This build up of silicone would prevent water from travelling down the conductors like a waterfall into a panel. Does silicone have any long term effects on the conductors, or SEU. I hope it's not bad for the insulation.

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#15705 - 10/25/02 11:29 AM Re: Silicone on cables  
HotLine1  Offline

Joined: Apr 2002
Posts: 6,853
Brick, NJ USA
Can't help with the silicone deterioration question, but I have a comment.
How is the water getting into the meter pan?
The pane should be relatively water tight; the conduit or cable entering the top should have a "WP" connector, and/or a hub. The head should prevent any rain from entering the conduit/cable. The "drop" drip loop should prevent water from "crawling" into the cable/conduit, or conductors.
As to the water flowing like a waterfall into the panel, I think you should seek the source.

The above is MHO, and please don't take it as sarcasim.


#15706 - 10/25/02 11:33 AM Re: Silicone on cables  
Redsy  Offline
Joined: Mar 2001
Posts: 2,056
Bucks County PA
I've wondered myself about the effects of silicone on electrical conductors with regard to 110.11, or 110.12(C).
If you want to be certain, GE makes an electrical grade silicone sealant (RTV 162) will help you find it.

Most WP SE Cable connectors are not all that WP after all. It is common to see an application of DuxSeal around the cable entry to help effect a good seal.

[This message has been edited by Redsy (edited 10-25-2002).]

#15707 - 10/25/02 12:23 PM Re: Silicone on cables  
resqcapt19  Offline
Joined: Nov 2000
Posts: 2,148
The electrical grade silicone is because standard silicone gives of vapors that are corrosive to copper and other electrical components while it is curing. I don't think it has anything to do with damage to the wire insulation.

[This message has been edited by resqcapt19 (edited 10-25-2002).]


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