240.15(b)(1)

[joebell]

Proposal to revise text

Original Text
(B)(1) Multiwire Branch Circuits

Except where limited by 210.4(B), individual single pole circuit breakers with or without identified handle ties, shall be permitted as the protection of each ungrounded conductor of multiwire branch circuits that serve only single phase line to neutral loads.



Revised Text

In accordance with the requirements of 210.4(B) individual circuit breakers with identified handle ties,shall be permitted as the protection of each ungrounded conductor of multiwire branch circuits that serve only single phase line to neutral loads


Substantiation

210.4(B) requires the disconnecting means of a multiwire branch circuit to "simultaneously disconnect all ungrounded conductors". The current wording of 240.15(B)(1) is misleading and seems to allow the single pole breaker to be used without the identified handle tie.




First crack at proposal writing. I hope I posted this right.

Joe

 

[e57]

IMO I think the handle tie thing has got to go before 2011 - it is bogus to think that it adds a significant amount of safety to protect unqualified persons from doing work to endanger themselves - especially when those same unqualified dopes are not reading the code in the first place. Say there were two noodles from two baseballs in the box - and an idiot shut off one - don't you think that same idiot is going to then cut the wrong one.

 

[ryan_618]

I agree with your proposal, but I would delete the "In accordance with the requirements of 210.4(B)."

 

[joebell]

WHy?

WHy?

I agree with your proposal, but I would delete the "In accordance with the requirements of 210.4(B)."

Ryan
Why do think that wording should be deleted?


Joe

 

[ryan_618]

Because it serves no purpose.

 

[joebell]

Thanks for your input Ryan.

Joe

 

[ryan_618]

Anytime sir!