Sealing Compound

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al hildenbrand

Senior Member
Location
Minnesota
Occupation
Electrical Contractor, Electrical Consultant, Electrical Engineer
Re: Sealing Compound

Sealing what? The gap between the edge of a drilled hole and the raceway going through the hole? Yes.

As duct seal stopping infiltration though the raceway? 300.7(A) says the seal must be an "approved material."
 

fbhwt

Electrical Systems Inspector
Location
Spotsylvania,Virginia
Occupation
Electrical Systems Inspector
Re: Sealing Compound

Seems like theres always a smart *** , lets see this forum deals with Hazardous(Classified)Locations. I guess I would be talking about the seal off used in a hazardous(classified)location and if RTV is an approved compound.I would say it probably is not since it does not say it is on the label. Just thought this would be the place to get an answer to my question.
 

rbalex

Moderator
Staff member
Location
Mission Viejo, CA
Occupation
Professional Electrical Engineer
Re: Sealing Compound

It definitely couldn?t be used for explosionproof seals.

Although it may meet the requirements of [2002] 501.5(C)(2)&(3) it will not meet 501.5(C)(1) which requires the seal fittings to be listed specifically for use with the sealing compound used.

Edit Add: BTW this is actually a very old requirement that just became directly "codified" in the 2002. Previously it was enforceable through 110.3(B), since most manufactures only listed their seals with their own sealing compounds.

[ August 24, 2005, 05:07 PM: Message edited by: rbalex ]
 
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