Supporting conduit less than 3' in length
- Thread starter slatesaz
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ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: Supporting conduit less than 3' in length
Support is not required. See 358.30(A)
Support is not required. See 358.30(A)
- Location
- Illinois
- Occupation
- retired electrician
Re: Supporting conduit less than 3' in length
Ryan,
How does that section eliminate the requirement for supports on short sections of EMT?
Don
Ryan,
How does that section eliminate the requirement for supports on short sections of EMT?
Don
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: Supporting conduit less than 3' in length
Don: Would you require that a six inch EMT nipple be supported? Perhaps I'm reading too much into the code, but I don't beleive that it is required. You are correct however, the section that I posted does not spell it out.
Don: Would you require that a six inch EMT nipple be supported? Perhaps I'm reading too much into the code, but I don't beleive that it is required. You are correct however, the section that I posted does not spell it out.
- Location
- Massachusetts
Re: Supporting conduit less than 3' in length
I found this interesting as around here we say any raceway less than 24" is a nipple and does not need support.
But I can not find any NEC or MEC rules that back this up.
So I ask too, can I be failed for no supports on a 6" x 4" nipple between two panel boards?
I found this interesting as around here we say any raceway less than 24" is a nipple and does not need support.
But I can not find any NEC or MEC rules that back this up.
So I ask too, can I be failed for no supports on a 6" x 4" nipple between two panel boards?
- Location
- Illinois
- Occupation
- retired electrician
Re: Supporting conduit less than 3' in length
I don't believe that support is necessary for short sections of raceway, but the code requires such support. I don't know of any exceptions to the rule that requires raceways to be supported within 3' of the conduit termination points. Maybe a proposal for the 2008 code?
Don
I don't believe that support is necessary for short sections of raceway, but the code requires such support. I don't know of any exceptions to the rule that requires raceways to be supported within 3' of the conduit termination points. Maybe a proposal for the 2008 code?
Don
stamcon
Senior Member
- Location
- South San Francisco CA
Re: Supporting conduit less than 3' in length
What about 348-13 Exception No 1(99NEC) -"Fastening of unbroken lengths shall be permitted to be increased to a distance of 5 ft(1.52m) where structural members do not readily permit fastening within 3ft(914mm)." ?
steve
What about 348-13 Exception No 1(99NEC) -"Fastening of unbroken lengths shall be permitted to be increased to a distance of 5 ft(1.52m) where structural members do not readily permit fastening within 3ft(914mm)." ?
steve
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: Supporting conduit less than 3' in length
I was looking at that also, but I don't think it applies for the same reason that my reference doesn't apply.
What I want to read is something similiar to the section that discusses lengths of MC cable less than 6'. If I'm not mistaken, the code specifically permits these not being supported (under certain conditions).
I was looking at that also, but I don't think it applies for the same reason that my reference doesn't apply.
What I want to read is something similiar to the section that discusses lengths of MC cable less than 6'. If I'm not mistaken, the code specifically permits these not being supported (under certain conditions).
Re: Supporting conduit less than 3' in length
358.30 (A) requires the run of EMT to be securely fastened within 3 ft. of each box, but it doesn't say how this fastening must be done, and it doesn't say that the fastening can't be the connection to another box. If the run between box A and box B is less than 3 ft. isn't it securely fastened within 3 ft. of each box? Assuming of course that it is securely fastened to each box.
358.30 (A) requires the run of EMT to be securely fastened within 3 ft. of each box, but it doesn't say how this fastening must be done, and it doesn't say that the fastening can't be the connection to another box. If the run between box A and box B is less than 3 ft. isn't it securely fastened within 3 ft. of each box? Assuming of course that it is securely fastened to each box.
- Location
- Illinois
- Occupation
- retired electrician
Re: Supporting conduit less than 3' in length
The conduit termination cannot not be the support. If it is then there is no need for a support for the first 10'.
Don
The conduit termination cannot not be the support. If it is then there is no need for a support for the first 10'.
Don
Re: Supporting conduit less than 3' in length
Don, even if we consider the termination as a support (and what code section prohibits us from doing so?), 358.30 (A) requires another support within 3 ft. of that termination. If the run between box A and box B exceeds 3 ft. It will need to be securely fastened within 3 ft. of each box.
Don, even if we consider the termination as a support (and what code section prohibits us from doing so?), 358.30 (A) requires another support within 3 ft. of that termination. If the run between box A and box B exceeds 3 ft. It will need to be securely fastened within 3 ft. of each box.
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