Pipe fill

[John165]

I just looked at a job and someone had added a 3 phase sub panel. He ran 4 1/2" runs of emt to a gutter and pulled one run of #2 in each pipe. I thought this was against code, if it is against code why? Thanks John

 

[LarryFine]

I just looked at a job and someone had added a 3 phase sub panel. He ran 4 1/2" runs of emt to a gutter and pulled one run of #2 in each pipe. I thought this was against code, if it is against code why? Thanks John

It's wrong because it makes the conduits behave like transformers and currents flow on them.

 

[Dennis Alwon]

Also look at section 300.3(B)

(B) Conductors of the Same Circuit.

All conductors of the same circuit and, where used, the grounded conductor and all equipment grounding conductors and bonding conductors shall be contained within the same raceway, conduit body, auxiliary gutter, cable tray, cablebus assembly, trench, cable, or cord unless otherwise permitted in accordance with 300.3(B)(1) through (B)(4).

 

[infinity]

I just looked at a job and someone had added a 3 phase sub panel. He ran 4 1/2" runs of emt to a gutter and pulled one run of #2 in each pipe. I thought this was against code, if it is against code why? Thanks John

Sounds like a hack job to me. Yes it's a violation.

 

[John165]

Thanks Guys

 

[tom baker]

It was a time and materials job

 

[TX+ MASTER#4544]

2023 NEC
Did I read that right......."4 runs of half inch EMT".
And one 2 AWG copper in each raceway?
It's against every rule in the Code book.

This can't be a licensed electrician!

Is this his version of a 3 phase circuit? Where's the grounded conductor? Running thru the bar jousts?
How did he terminate them in the panel?
Three single pole breakers.... chuckle.
Oh, was it a three pole CB?
A 2 AWG is good for 130 amps on a 90 degree terminal but does he know that?
A 2 AWG copper THHN has an ampacity of 115 amps when terminated on a 75 degree CB

Thanks for reading
TX+MASTER#4544

 

[John165]

2023 NEC
Did I read that right......."4 runs of half inch EMT".
And one 2 AWG copper in each raceway?
It's against every rule in the Code book.

This can't be a licensed electrician!

Is this his version of a 3 phase circuit? Where's the grounded conductor? Running thru the bar jousts?
How did he terminate them in the panel?
Three single pole breakers.... chuckle.
Oh, was it a three pole CB?
A 2 AWG is good for 130 amps on a 90 degree terminal but does he know that?
A 2 AWG copper THHN has an ampacity of 115 amps when terminated on a 75 degree CB

Thanks for reading
TX+MASTER#4544

Yes 4 runs of 1/2" emt with 1 #2 in each pipe to the gutter, from the gutter he ran 1 pipe to panel and terminated in main lugs of the panel. He put 100 amp 3 phase breaker main panel. He brought the ground in a pipe with some other circuits. I don't get it he opened up the wall to do this. Why he didn't run surface mount emt to the gutter which is surface mounted I don't know. The rest of the piping he did is nice and neat. Who knows.

 

[don_resqcapt19]

While a violation of the NEC, there is no real world issue. That is not enough current to cause excessive heating. Under the Canadian code, this is not an issue unless the current exceeds 200 amps.

 

[Electromatic]

Probably only had a 1/2" bender!