Circuit Count

[Alwayslearningelec]

Are these the biggest waste of money notes? Would you even follow these if running homeruns out of a panel?

 

[infinity]

NO. As long as proper derating is applied pulling only 3 circuits in each raceway is dumb.

 

[roger]

Well in reality he is allowing 12 conductors. A four wire MWBC is one circuit so allowing three in a conduit would equal 12 conductors. I know what he is wanting to say but he missed the boat (pun intended)

 

[infinity]

Well in reality he is allowing 12 conductors. A four wire MWBC is one circuit so allowing three in a conduit would equal 12 conductors. I know what he is wanting to say but he missed the boat (pun intended)

The old is a MWBC one circuit or three. Obviously the engineer means that a 4-wire MWBC is indeed 3 circuits.

 

[roger]

Obviously the engineer means that a 4-wire MWBC is indeed 3 circuits.

We know that but if he wants to be correct in his instructions he needs to be.

 

[roger]

The reason a MWBC neutral most times never carries equal current of any one ungrounded conductor proves it is one circuit, current is finding another path back to source than the grounded conductor.

 

[infinity]

We know that but if he wants to be correct in his instructions he needs to be.

The note is clear and correct as written. It's a single MWBC and three circuits.

 

[dkidd]

Are these the biggest waste of money notes? Would you even follow these if running homeruns out of a panel?

If that is in the contract documents that you committed to, you can't arbitrarily not do it.

 

[infinity]

If that is in the contract documents that you committed to, you can't arbitrarily not do it.

Sounds like boiler plate junk he could always ask for permission. Maybe the engineer wants to ensure that more than 3 CCC's in a raceway will have the proper derating.

 

[roger]

Maybe the engineer wants to ensure that more than 3 CCC's in a raceway will have the proper derating.

So he should have said what he meant.