oversized neutral
- Thread starter ed danger
- Start date
- Status
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Not if the circuit is truly a MWBC-- one conductor on each phase with a common neutral.
I agree with Dennis, but ask that you note the FPN at 210.4(A).
This, as far as I know, is as close as the Code comes to recognizing the possible need for an oversized neutral on 3 phase 4 wire MWBC with substantial nonlinear loads.
The true need for such should be based on engineering data.
This, as far as I know, is as close as the Code comes to recognizing the possible need for an oversized neutral on 3 phase 4 wire MWBC with substantial nonlinear loads.
The true need for such should be based on engineering data.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Good point Gus. Nonlinear loads can change things a bit.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
I don't think that there is any place in the NEC where an over-sized neutral is required for a MWBC. Although it's mentioned it's really a design issue.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
- Status