weathertight bulkhead options with LFMC fitting on one side, EMT (or multi-conductor cable) on the other side?

emiller233 said:
That was just their response, they're fighting the nipple idea for whatever reason...?. I've told them its the cheapest option and they said they needed a different option without raising the cost much. They're mostly 2" runs, so they're just trying to avoid the cost of proper bulkhead fittings is about what it comes down to
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Then just weld a 2" rigid coupling in and let the sparky sort it out with the proper fittings or nipples on each side.
 
gadfly56 said:
Another potential option is a Swagelok bulkhead fitting. You can get one for any size of EMT, which is just tubing as far as Swagelok is concerned. You can get them to terminate the EMT on one or both sides with NPT threads on either. They can also do a pass-through for the EMT if you want to go that way.

www.swagelok.com

High-Quality Fluid System Solutions & Components

Swagelok is a privately held manufacturer of fluid system solutions including components, assemblies, and services trusted in critical industries worldwide
www.swagelok.com www.swagelok.com
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they're not a listed component tho. these systems will be shipping many places/countries so we need to avoid anything they can nitpick at during installs
 
infinity said:
Then just weld a 2" rigid coupling in and let the sparky sort it out with the proper fittings or nipples on each side.
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I think it’s gonna end up being hubs. Bc it’s just easier than fighting people
Over welding galvanized and than having to paint it. Then later down the road an inspector making us prove it’s a conduit coupling, not a standard pipe coupling
 
emiller233 said:
I think it’s gonna end up being hubs. Bc it’s just easier than fighting people
Over welding galvanized and than having to paint it. Then later down the road an inspector making us prove it’s a conduit coupling, not a standard pipe coupling
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A hub is designed to go into an enclosure or box. How will you transition on the inside with the hub threads sticking in?
 
don_resqcapt19 said:
I would see that as a violation of 300.18(B) and red tag it.
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I would argue that the coupling is a fitting it is not a raceway so no violation. By welding only the fitting only you're not altering the integrity of the raceway itself which is why welding of the raceway is prohibited.
 
infinity said:
I would argue that the coupling is a fitting it is not a raceway so no violation. By welding only the fitting only you're not altering the integrity of the raceway itself which is why welding of the raceway is prohibited.
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It still gets a red tag from me. There is no separate listing for a rigid or IMC coupling....they are both listed as part of the conduit.
 
don_resqcapt19 said:
It still gets a red tag from me. There is no separate listing for a rigid or IMC coupling....they are both listed as part of the conduit.
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Other than you interpretation that a coupling is the conduit what harm would there be by welding a coupling?
 
infinity said:
When you field thread RMC you remove the outer protective coating which you are supposed to replace.
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I looked and I dont see a requirement for that. Where is it? Under uses permitted there is:

4) Ferrous Raceways and Fittings. Ferrous raceways and fittings protected from corrosion solely by enamel shall be permitted only indoors and in occupancies not subject to severe corrosive influences.
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Which is kinda interesting, as it seems that would not allow field threading outdoors unless you have it re-galvanized.
 
electrofelon said:
I looked and I dont see a requirement for that. Where is it? Under uses permitted there is:



Which is kinda interesting, as it seems that would not allow field threading outdoors unless you have it re-galvanized.
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The code requires field cut threads to be protected by an approved corrosion resistant compound when installed in an outside location.
300.6(A) Ferrous Metal Equipment.
Ferrous metal raceways, cable trays, cablebus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, enclosures (other than surrounding fences and walls), elbows, couplings, nipples, fittings, supports, and support hardware shall be suitably protected against corrosion inside and outside (except threads at joints) by a coating of approved corrosion-resistant material. Where corrosion protection is necessary and the conduit is threaded anywhere other than at the factory where the product is listed, the threads shall be coated with an approved electrically conductive, corrosion-resistant compound.
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electrofelon said:
I think you need to actually carefully read what the code section says.
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The welding of the coupling is very very clearly supporting the coupling and is not permitted.

This is very simply an interpretation that the AHJ is permitted to make by the provisions of 90.4.

If you don't like the red tag, appeal it..I would not change my position unless overruled by a higher authority.
 
don_resqcapt19 said:
The welding of the coupling is very very clearly supporting the coupling and is not permitted.

This is very simply an interpretation that the AHJ is permitted to make by the provisions of 90.4.

If you don't like the red tag, appeal it..I would not change my position unless overruled by a higher authority.
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IT seems very very clear to me that if the conduit is provided with other NEC compliant support, than the welding coupling is not needed as support and thus is not an NEC support :) If I have say a conduit run on properly spaced unistrut, and in between I support it with some dental floss are you going to tell me the dental floss is not an acceptable support?
 
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