jph320
Member
- Location
- Cinnaminson nj
- Occupation
- Electrician
Can anyone tell me which code cycle neutral sharing was stopped? In commercial or residential
Describe exactly what you mean by sharing. If you are asking about multiwire branch circuits, they never went away, but there have been changes that either require use of handle ties or in the dwelling unit area AFCI requirements and multipole AFCI device availability has kind of dictated that less MWBC's are being installed then there used to be.Can anyone tell me which code cycle neutral sharing was stopped? In commercial or residential
200.4 Neutral Conductors. Neutral conductors shall not
be used for more than one branch circuit, for more than one
multiwire branch circuit, or for more than one set of un-
grounded feeder conductors unless specifically permitted
elsewhere in this Code
"Neutral sharing", a single large common neutral used for multiple, non-MWBC circuits is still permitted by 225.7(B). The wording in 200.4 of the 2011 NEC was added to say:
This was a code change written by one of our moderators.
as noted, still allowed, just with requirements starting with the '08 Code.I was refering to multi wire cir
Add one other thing since you mention residential. The requirement for large portions of a house to be on arc fault breakers which require a dedicated neutral and the handle tie requirement mentioned above, makes dedicated neutrals a way to idiot proof installation in homes.
I don't like to use the term "idiot proof", because whenever you think you have accomplished making something idiot proof along comes an improved idiot.
I used to say that it is relatively easy to make something idiot proof, much harder to make it engineer proof and impossible to make it physicist proof.
I have yet to see a MWBC that has a tied breaker. In my area I believe this is one of those rules that the locals choose to ignore.
And yes we have some very current installations. And not just by me. Kind of like super dark tinted side windows and speed limits.
Disclaimer: Not that I advocate not using tied breakers. Just haven't seen any is all.
What part of southern CA are you from?
I am starting to see them around here.
I work in the San Diego area.
I'll probably just pull 2 more neutrals and use single breakers before I use a tied breaker. Makes more sense for my work
environment, where it is difficult to turn a lot of stuff off.
I work in the San Diego area.
I'll probably just pull 2 more neutrals and use single breakers before I use a tied breaker. Makes more sense for my work
environment, where it is difficult to turn a lot of stuff off.