I want to use rigid pipe for conduit in a residential setting, but I want to use the unions/joints and flanges used with black pipe used with gas lines. If I run romex through, is this acceptable to codes
No, the use of gas fittings is not permitted. 344.6 requires that the conduit, couplings, factory elbows, and all associated fittings be listed for the intended use. It does not matter if you plan on installing Type NM cable in the raceway, the raceway has to be installed in accordance with the applicable code Articles in Chapter 3.
here is some extra detail. The client has exposed beams and likes the look of the black pipe, especially the fittings. The conduit does not have to protect against environmental agents. Does this application change anything?
No it does not change anything. Schedule 40 black pipe and Schedule 40 black pipe fittings are not listed for use as a Chapter 3 wiring method in the NEC. The NEC requires all wiring methods and materials to be installed in accordance with the appropriate code articles that have purview other the wiring method in Chapter 3. In your example, they would be Articles 300, 334, and 344.
Listed ridged metal conduit and the listed associated fittings can be painted any color the client wants after installation.
Agree w/Brian 100%
Thanks guys, guess the client's Pinterest kitchen will have to change a bit. Pinterest meets reality.
Most of the "DIY" projects that are posted on Pinterest would not pass an inspection.
.The only "real" option is may be to create a facade from some other material provided you still meet all of the code requirements. The code applies to "permanent installations" and does not apply to appliances
Sounds like a visit to the wiremold catalog is in order.
Additional options are available. Priming and painting the Rigid is an option, however, not cost effective.
Perhaps re-thinking the methodology is in order. Romex is not authorized for any commercial application and limited in its use in residential. Some jurisdictions limit it to 3 story buildings
Listed Type NM cable is permitted in many commercial applications and is a commonly installed wiring method for one and two family dwelling units. Type NM cable is permitted to be installed in all 5 types of construction, but is limited to installation within a raceway in Types I and II construction.
No Ricky, not really. Take a look at 334.12 "Uses not permitted." The second one down states,
"Exposed within a dropped or suspended ceiling cavity IN OTHER THAN one- and two-family and multifamily dwell‐ings"
So that is the first clue that NM cable, or Romex as you call it, can be used in certain commercial applications. If you go back to section 334.10 "Uses permitted" go down to numbers 3, 4, and 5. If one meets certain conditions, NM cable is allowed in [certain] commercial applications. But it is very limited.
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