ahab8783
Member
- Location
- Louisville, KY, USA
I read a different string (linked below) on this topic but would like a little more clarification if possible. I work for an OEM of explosion proof electrical equipment and was recently approached by a customer who requested us to fit one of our explosion proof products with an explosion proof junction box and pipe nipple. I can easily find a explosion proof junction box but after a litle digging around, I'm realizing that explosion proof pipe nipples don't exist. The nipple needs to be 1/2" male NPT on both ends and needs to be as short as possible. Because our product is not hermetically sealed, it would require a lead seal when installed in a Cl 1, Div 1 environment.
My first question is: Is a lead seal require between the junction box and our product if the distance is less 36"? Based on 501.15(A.3), I'm interpreting that lead seals aren't required but want to be sure
My second question is: Is any HazLoc certification required for a short pipe nipple as described above? From what I've read on the forum linked below, certification aren't required, but does it need to be a listed component?
I'm not a NEC expert (or even novice) by any stretch so I apologize if these questions are stupid.
(501.15(A.3)) Two or More Explosionproof Enclosures. Where two or more explosionproof enclosures for which conduit seals are required under 501.15(A)(1) are connected by nipples or by runs of conduit not more than 900 mm (36 in.) long, a single conduit seal in each such nipple connection or run of conduit shall be considered sufficient if located not more than 450 mm (18 in.) from either enclosure.
http://forums.mikeholt.com/showthread.php?t=160937
My first question is: Is a lead seal require between the junction box and our product if the distance is less 36"? Based on 501.15(A.3), I'm interpreting that lead seals aren't required but want to be sure
My second question is: Is any HazLoc certification required for a short pipe nipple as described above? From what I've read on the forum linked below, certification aren't required, but does it need to be a listed component?
I'm not a NEC expert (or even novice) by any stretch so I apologize if these questions are stupid.
(501.15(A.3)) Two or More Explosionproof Enclosures. Where two or more explosionproof enclosures for which conduit seals are required under 501.15(A)(1) are connected by nipples or by runs of conduit not more than 900 mm (36 in.) long, a single conduit seal in each such nipple connection or run of conduit shall be considered sufficient if located not more than 450 mm (18 in.) from either enclosure.
http://forums.mikeholt.com/showthread.php?t=160937
