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seaneys
08-19-2007, 06:58 AM
Does anyone squirt silicon in wire nuts in damp locations (basements, etc)? I've heard of it, but have never actually done it. Is it worth it for a location that is never intended to get wet?

Thanks,
Steve

snafflekid
08-19-2007, 11:28 AM
Does anyone squirt silicon in wire nuts in damp locations (basements, etc)? I've heard of it, but have never actually done it. Is it worth it for a location that is never intended to get wet?

Thanks,
Steve

Wait, do you mean silicone caulk? I don't know of a specific rule against it, but I would say it is a very bad idea. Wire nuts are flame retardant (don't think silicone is) and you are going to have a hard time actually making a watertight seal. "Damp" is not the same thing as "exposed to wetness" in which case you need to use moistureproof boxes.

frenchie
08-19-2007, 11:35 AM
There's pre-caulked wire nuts made for damp locations.

http://www.smarthome.com/7870.html

jwelectric
08-19-2007, 01:02 PM
Does anyone squirt silicon in wire nuts in damp locations (basements, etc)? I've heard of it, but have never actually done it. Is it worth it for a location that is never intended to get wet?

Thanks,
Steve

Silicon can not be used on conductors period!!!!

HandyAndy
08-19-2007, 04:18 PM
wanting to learn not argue.

Is there a code for no silicon sealants?

http://www.spearsmfg.com/prod_brochures/DS-2A-0597_1004.pdf

http://www.idealindustries.com/media/pdfs/products/weatherproof_underground_brochure.pdf
break down of the above,
http://www.idealindustries.com/products/wire_termination/twist-on/underground.jsp
http://www.idealindustries.com/products/wire_termination/twist-on/twister_db_plus.jsp
http://www.idealindustries.com/products/wire_termination/twist-on/weatherproof.jsp

they all use a "Dielectric Silicon Sealant".

here is a site that seems to suggest there silicon sealant for electrical use.
http://www.silchemmarketing.com/silicone_compounds.htm

here is silicon self fusing tape (apparently similar the old rubber tape that was used with split bolts and such)
http://www.arlon-std.com/Library/Brochures/Self-Fusing%20Silicone%20Tape%20Brochure.pdf

Bob NH
08-19-2007, 04:33 PM
SILICON is a nonmetallic element that is used in manufacturing electrical components. It is also a common element is compounds such as glasss and sand.

SILICONE is a class of organic compounds that include the element SILICON.

hj
08-19-2007, 04:41 PM
Usually those blue connectors are labled for low voltage only.

jwelectric
08-19-2007, 04:53 PM
110.11 Deteriorating Agents.
Unless identified for use in the operating environment, no conductors or equipment shall be located in damp or wet locations; where exposed to gases, fumes, vapors, liquids, or other agents that have a deteriorating effect on the conductors or equipment; or where exposed to excessive temperatures.

FPN No. 1: See 300.6 for protection against corrosion.

FPN No. 2: Some cleaning and lubricating compounds can cause severe deterioration of many plastic materials used for insulating and structural applications in equipment.

Some of the off the shelf silicon agents will damage the insulation of some types of conductors.

If silicon is going to be used on electrical conductors or equipment it needs to be listed and labeled for the prupose.

HandyAndy
08-19-2007, 07:14 PM
Thank you for the information and I apologize for my misspelling of Silicone

Bob NH
08-20-2007, 06:08 AM
I wasn't criticizing the spelling.

Lot's of people confuse silicon and silicone.

It's like concrete and cement. Many people look at concrete and call it cement.

Cement + aggregate + water --> concrete.

Silicon + various other elements --> Silicones

jwelectric
08-20-2007, 06:15 AM
Look at my posts

I left the E off on purpose

snafflekid
08-20-2007, 01:37 PM
Does anyone squirt silicon in wire nuts in damp locations (basements, etc)? I've heard of it, but have never actually done it. Is it worth it for a location that is never intended to get wet?

Thanks,
Steve

Okay, I bet you are referring to silicone grease. This stuff is okay to use and is often found in automobile wire harness connectors, where moisture is a problem. I was thinking bathtub caulk heheh

Rancher
08-20-2007, 02:06 PM
We used Silicone in manufacturing back in the 70's to keep CRT monitors in the computer industry from arcing from the high voltage section to the outside case. It was GE's RTV stuff. However that said I wouldn't add any thing to a wire nut, it either should be in a dry enough location not to need anything else or it should have the proper weather proof enclosure to protect the connection.

Rancher

seaneys
08-20-2007, 07:53 PM
Thanks a lot for the clarification. I thought something seemed 'strange' when I noticed this in more than one trusted reference. I held off since it seemed overkill. Our basement is humid, but not THAT humid that I would call it damp.

Steve

Livin4Real
09-10-2007, 10:49 PM
May have been mentioned but if your worried about it you can use dielectric grease on the nuts (wire of course, not your own, unless your into that :p )
Also referred to as marine grease (what they use on lights on boat trailers, etc.) And if your basement is that damp you should have a dehumidifier.