Example of 300.3(B)(3)

[Twoskinsoneman]

Does anyone have a picture of an installation of 300.3(B)(3) in compliance with 300.20(B)?

Thanks

 

[iwire]

Underground Isolated Phase Installation

Here we are looking at three, 4 wire feeders in MI cable using a non-ferris entry into a panel​

 

[Twoskinsoneman]

Underground Isolated Phase Installation

Here we are looking at three, 4 wire feeders in MI cable using a non-ferris entry into a panel​

Thanks iwire. I think I've seen the pic of the MI before now that my brain is ticking again.

Hey I was watching a MH DVD and he said this isolating the phases is only approved under ground per 300.6(H) EX2. But don't you think non-under ground installs get the same permission from 300.3(B)(3)??

 

[don_resqcapt19]

Thanks iwire. I think I've seen the pic of the MI before now that my brain is ticking again.

Hey I was watching a MH DVD and he said this isolating the phases is only approved under ground per 300.6(H) EX2. But don't you think non-under ground installs get the same permission from 300.3(B)(3)??

I would think so, but Panel 3 does not agree.

3-11 Log #2229 NEC-P03

Final Action: Reject

(300.3(B)(1) Exception)

____________________________________________________________
Submitter: ​

Donald A. Ganiere, Ottawa, IL

Recommendation: ​

Delete the following:

Exception: Conductors installed in nonmetallic raceways run underground

shall be permitted to be arranged as isolated phase installations. The raceways
shall be installed in close proximity, and the conductors shall comply with the
provisions of 300.20(B).
Substantiation: ​

The exception is not required. Such installations are permitted

by 300.3(B)(3) in all locations, not just underground locations.

Panel Meeting Action: Reject
Panel Statement: This exception is necessary to permit installations where
nonmetallic raceways are installed in close proximity with all of Phase A in one
raceway, all of Phase B in another raceway, all of Phase C in another, and all
the grounded conductors in another raceway. Where this is useful is between
underground manholes so the phase conductors can exit the raceways and be
easily racked within the manhole, taking up less space, and making it easier to
do testing and maintenance on the installation. This would not be permissible
without this exception.
Number Eligible to Vote: 13​

Ballot Results: Affirmative: 13​

 

[Twoskinsoneman]

I would think so, but Panel 3 does not agree.

300.3(B)(3) is misleading at best then...

Thank you for posting that proposal.

I'll just try to lock it in that the consensus is that it's underground only even though when I read 300.3(B)(3) I tend to think other wise.