ECN Forum Forums Code Related Discussion NEC & other Code issues Romex in break room

I consider the addition of a requirement that all circuits sharing a neutral be grouped together and be on a common-trip breaker to be a restriction on the use of multi-wire circuits.

Type 1 & 2 are basically construction materials in load bearing walls and floors that re non-combustible (no wood)

This is a link to the IBC referenced Florida Building Code

http://ecodes.cyberregs.com/cgi-exe...nonindx/ST/fl/st/b200v10/index.htm#b=603

Reno:
FRom the '11 NEC....."(D) Grouping. The ungrounded and grounded circuit conductors of each multiwire branch circuit shall be grouped by cable ties or similar means in at least one location within the panelboard or other point of origination.
Exception: The requirement for grouping shall not apply if
the circuit enters from a cable or raceway unique to the
circuit that makes the grouping obvious."

Now, with the exception, some opinions are that a xx/3 NM qualifies for the exception. Or, one tye-wrap per MWBC is not that big of a deal is it??

You're also required to land them on a a common-trip breaker -though a handle tie will suffice. No more landing the wires on whatever spaces might be handy; they have to be next to each other.

Big deal? I don't have a problem with the idea, though whether it should be a matter of code is another discussion, for another thread.

It's still a restriction, however small.

The exception clearly says if the conductors of the MWBC come in on a single cable they are "grouped".



As for the paired breakers, it sounds more reasonable than a lot of new code rules we have seen. I always wondered why this wasn't a code rule. It certainly avoids confusion a few years down the road.
These are both things conscientious electricians have always done.