RMC between seal off and enclosure?

K

kjroller

Senior Member
Location
Dawson Mn
Occupation
Master electrician
My question is simple can you use RMC or hard pipe in between a seal off fitting and motor enclosure or switching enclosure, in a Class 1 Div 1 area. My initial thought is no based on 501.15 A(2). Let me now your thoughts.

Second Question is on an EYS seal of fitting with a Male and Female hub, the Male side appears to be a nipple. Is this allowed between the seal off since it is a part of the seal off kit? It seems to contradict 501.15(2)
 
kjroller said:
My question is simple can you use RMC or hard pipe in between a seal off fitting and motor enclosure or switching enclosure, in a Class 1 Div 1 area. My initial thought is no based on 501.15 A(2). Let me now your thoughts.

Second Question is on an EYS seal of fitting with a Male and Female hub, the Male side appears to be a nipple. Is this allowed between the seal off since it is a part of the seal off kit? It seems to contradict 501.15(2)
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For Example, could I have coming out of a snap switch a 9-inch RMC nipple a listed union and another 9-inch nipple going to a seal off and still be within code, or for a second example a straight piece of 18" RMC right into seal off? Like the image?

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What code edition? 501.15(A)(2) is pressurized enclosures in the 2020 and 2023? Are you asking about the last part of 501.15(A)(1) that says?
Conduit seals shall be installed within 450 mm (18 in.) from the enclosure or as required by the enclosure marking. Only threaded couplings, or explosionproof fittings such as unions, reducers, elbows, and capped elbows that are not larger than the trade size of the conduit, shall be permitted between the sealing fitting and the explosionproof enclosure.
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In any case threaded conduit and any of the fittings listed above can be used between the seal and the enclosure that requires a seal.
 
don_resqcapt19 said:
What code edition? 501.15(A)(2) is pressurized enclosures in the 2020 and 2023? Are you asking about the last part of 501.15(A)(1) that says?

In any case threaded conduit and any of the fittings listed above can be used between the seal and the enclosure that requires a seal.
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Your right I mispoke on the number! And thank you thats whay I was looking for I guess your just supppse to assume you can use conduit within 18 inches? The fittings I get thats right there in thr code. The conduit is just assumed then? It makes sense to me from a application standpoint just figured they would list that in the code somewhere.
 
kjroller said:
Your right I mispoke on the number! And thank you thats whay I was looking for I guess your just supppse to assume you can use conduit within 18 inches? The fittings I get thats right there in thr code. The conduit is just assumed then? It makes sense to me from a application standpoint just figured they would list that in the code somewhere.
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You can submit a code change to add threaded conduit. The system is open for the submission of Public Inputs to make changes for the 2029 code until early April of this year.
 
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