Do Bushings need to be used with EMT pipe?

Status
Not open for further replies.
M

mbrown1610

Member
Does Bushings need to be used with EMT?
We are having some equipment moved and relocating the Disconnects.
The Electrical contractors doing the install are not using Bushings with the
EMT pipe. They say it's not necessary only if the conduit is non-metallic?
Are they correct - everywhere I have been I see it used?
Thanks for any help, if it is necessary can someone point out to me
the Article #?

Thanks for any help,
Mark Brown
 
See 300.4(F), there is no distinction of raceway types where 300.4(F) requires them.

Roger
 
Roger,
Based on the wording of 300.4(F), I submit that only threaded raceways require the use of bushings, as they are the only raceways that enter the enclosure. That is not the intent of the code section and the CMP does not agree with my interpretation, but, in my opinion, that is what the words say.
(F) Insulated Fittings Where raceways containing ungrounded conductors 4 AWG or larger enter a cabinet, box enclosure, or raceway, the conductors shall be protected by a substantial fitting providing a smoothly rounded insulating surface, unless the conductors are separated from the fitting or raceway by substantial insulating material that is securely fastened in place.
Click to expand...

Don
 
Don, now that you mention it, it may not be the intent of CMP 3 but I wonder if it is the intent of CMP 8 that EMT does not need a bushing, after all there is no 358.46.

Roger
 
(F) Insulated Fittings Where raceways containing ungrounded conductors 4 AWG or larger enter a cabinet, box enclosure, or raceway, the conductors shall be protected by a substantial fitting providing a smoothly rounded insulating surface, unless the conductors are separated from the fitting or raceway by substantial insulating material that is securely fastened in place.

Don
I take it that this part of the sentence is implying that the fitting is part of the conduit.
 
(F) Insulated Fittings Where raceways containing ungrounded conductors 4 AWG or larger enter a cabinet, box enclosure, or raceway, the conductors shall be protected by a substantial fitting providing a smoothly rounded insulating surface, unless the conductors are separated from the fitting or raceway by substantial insulating material that is securely fastened in place.


How can a raceway enter a raceway?
 
Don,

358.30, along with 300.18, EMT shall be installed as a complete system-etc.

are the references that I was thinking of when commenting about "fittings"

at least in some cases, as being the raceway. I will keep your version in

mind while reading other sections of the code to see how it fits in.
 
don_resqcapt19 said:
. . . I submit that only threaded raceways require the use of bushings, as they are the only raceways that enter the enclosure. That is not the intent of the code section and the CMP does not agree with my interpretation, but, in my opinion, that is what the words say.
Click to expand...
I do agree with you. There is a difference between a conduit and a fitting. Below the #4 mentioned in 300.4(F), we've always used EMT fittings without bushings, unless otherwise required.
 
Status
Not open for further replies.
Top