344.30(A) and 344.30(B)

[Dale001289]

Let’s say you have a 3/4” RMC, into a threaded hub GUA ‘splice box’ that is firmly attached to the ceiling via unistrut…do you still need a support on each side of that box within 3’? Or just one side? and then a second support at 10’ from the first support?

 

[Master Nater]

344.30(A) Securely fastened (not "supported") - RMC shall be secured in accordance with one of the following:

(1) - RMC shall be securely fastened within 3ft of each outlet box, junction box, device box, cabinet, conduit body, or other conduit termination.
(2) - Fastening shall be permitted to be increated to a distance of 5ft where structural members do not readily permit fastening within 3ft.
(3) - Where approved ... (deals with going through roof for mast)

how did you attach a CLI, DIVI box to strut without drilling a hole through it? to maintain the hazardous ratings of those enclosures, they could/should be supported by the conduits installed in them as permitted in 314.23(E) and have the conduit strapped to the strut, not the enclosure. after this, you're into distance restrictions on the distance from the box from 314.23, not 344.30.

no more than 3ft if conduits are on differing sides of the box, and 18 inches if the two pipes are on the same side of the box.

 

[Dale001289]

344.30(A) Securely fastened (not "supported") - RMC shall be secured in accordance with one of the following:

(1) - RMC shall be securely fastened within 3ft of each outlet box, junction box, device box, cabinet, conduit body, or other conduit termination.
(2) - Fastening shall be permitted to be increated to a distance of 5ft where structural members do not readily permit fastening within 3ft.
(3) - Where approved ... (deals with going through roof for mast)

how did you attach a CLI, DIVI box to strut without drilling a hole through it? to maintain the hazardous ratings of those enclosures, they could/should be supported by the conduits installed in them as permitted in 314.23(E) and have the conduit strapped to the strut, not the enclosure. after this, you're into distance restrictions on the distance from the box from 314.23, not 344.30.

no more than 3ft if conduits are on differing sides of the box, and 18 inches if the two pipes are on the same side of

I took a closer look today and the conduit body is not a GUA. It has mounting feet and attaches directly to the ceiling, I believe it’s a a gasketed Appleton fitting with 3/4” hubs-
I agree with you completely - the distance restrictions should be based on 314.23(E); but this client refuses to let go of 344.30(A)(1) citing the fact there are no exceptions noted.

 

[Master Nater]

I took a closer look today and the conduit body is not a GUA. It has mounting feet and attaches directly to the ceiling, I believe it’s a a gasketed Appleton fitting with 3/4” hubs-
I agree with you completely - the distance restrictions should be based on 314.23(E); but this client refuses to let go of 344.30(A)(1) citing the fact there are no exceptions noted.

tell him to keep reading to 344.30(A)(2). i've typed it out for you above, at least from the 2023 NEC.

is this a bid job, where it was spec'd to be that way before a bid? if so, you're stuck.

if not, figure up a price to fix it his way, and see if he recognizes 344.30(A)(2) yet. either way, you win.

 

[Dale001289]

Appleton

tell him to keep reading to 344.30(A)(2). i've typed it out for you above, at least from the 2023 NEC.

is this a bid job, where it was spec'd to be that way before a bid? if so, you're stuck.

if not, figure up a price to fix it his way, and see if he recognizes 344.30(A)(2) yet. either way, you win.

This is for a large industrial project and a client who has deep pockets BUT doesn’t want to be charged to add the supports. I’ve explained the reasoning behind 314.23(E) exception but they’re far too obstinate to reason with
Thanks for the feedback