Rigid Conduit thread sealant-any acceptable? 1

[EvanH]

Reading NEC's sections on IMC and Rigid Conduit, I can't spot any definitive rules on whether pipe sealant is allowed or forbidden. Clearly it seems that using a compound which prevented electrical conductivity would be undesirable, but does anyone have any specific guidelines they could point me towards?

Also, are there any guidelines on this issue that would be specific for Class I Division 1 Hazardous Locations?

Thanks! -Evan

 

[dpc]

I suspect if there is any requirement one way or the other, it would be in UL. I'm just a dumb engineer, not an electrician, but I don't think any compound is used on the threads.

Check out this little guy:

http://www.steelconduit.org/pdf/ConGuide.pdf

Maybe it will be of some help.

 

[busbar]

For a listed product, suggest T&B “Kopr-Shield” Don’t expect a perfect watertight seal, but preservation of raceway continuity during faults. Page 11 of

http://tnbelectricalworld.tnb.com/contractor/docs/shamrock.pdf

Another unlisted similar copper-particle antiseize paste is FelPro 'C5A'

http://www.newmantools.com/felpro/c5a.htm

For hazardous-location installations, Crouse-Hinds HTL or STL compounds are intended for the purpose.

http://www.crouse-hinds.com/CrouseHinds/pdf/314.PDF

Silver-particle antiseize pastes are Cool-Amp 'Conducto-Lube' and SwageLok 'Silver Goop'.

http://www.cool-amp.com/page2.html

Page 11 of

http://www.swagelok.com/downloads/webcatalogs/MS-01-169.pdf

Nickel-bearing compounds are Bostik-Findley ‘Never-Seez’ Pure Nickel Special and ‘Never-Seez’ Nickel Special, Nuclear Grade.

http://www.bostikfindley-us.com/pro...es&divisionId=6&categoryId=9&subCategoryId=16

http://192.168.210.80/PDF/CD_NS/N24 NS PureNickelSpec_NG.pdf

 

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