Multi-Wire Branch Cirucit

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Mike01

Senior Member
Location
MidWest
For a multi-wire branch circuit (example systems furniture) where three pole breaker or three individual single pole breakers are used (ph.A, ph.B, & ph.C) with a common neutral would there be any reason to increase the neutral as long as the phases are not duplicated within the multi-wire branch circuit?
 

iwire

Moderator
Staff member
Location
Massachusetts
I agree with Charlie but will also point out most of that furniture set up for a MWBC supply already has an up-sized neutral.
 

Dennis Alwon

Moderator
Staff member
Location
Chapel Hill, NC
Occupation
Retired Electrical Contractor
I agree with Charlie but will also point out most of that furniture set up for a MWBC supply already has an up-sized neutral.
If the furniture has an upsized neutral wouldn't be adviseable to do the same to feed it if there are harmonics? How do you know when you have a high proportion of harmonics?
 
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