Hendrix
Senior Member
- Location
- New England
Can a mwbc be used for 2 receptacle circuits in a commercial building?
I know they are used for office cubicles.
I know they are used for office cubicles.
MWBC
- Thread starter Hendrix
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ptonsparky
Tom
- Occupation
- EC - retired
605.9 Freestanding-Type Office Furnishings, Cord- and
Plug-Connected. Individual office furnishings of the freestanding
type, or groups of individual office furnishings
that are electrically connected, are mechanically contiguous,
and do not exceed 9.0 m (30 ft) when assembled, shall
be permitted to be connected to the building electrical system
by a single flexible cord and plug, provided that all of
the conditions of 605.9(A) through (D) are met.
605.9(D) Multiwire Circuits, Not Permitted. An individual office
furnishing or groups of interconnected office furnishings
shall not contain multiwire circuits.
Plug-Connected. Individual office furnishings of the freestanding
type, or groups of individual office furnishings
that are electrically connected, are mechanically contiguous,
and do not exceed 9.0 m (30 ft) when assembled, shall
be permitted to be connected to the building electrical system
by a single flexible cord and plug, provided that all of
the conditions of 605.9(A) through (D) are met.
605.9(D) Multiwire Circuits, Not Permitted. An individual office
furnishing or groups of interconnected office furnishings
shall not contain multiwire circuits.
- Occupation
- Licensed Electrician
Except for dkidd's exception there is no reason not to use MWBC.
The office units I have wired hard wire to a power pole and came pre wired with three MWBC going to some of the plugs and one circuit with a dedicated neutral. That was before 2008 and the evil 210.4(B) though.
The office units I have wired hard wire to a power pole and came pre wired with three MWBC going to some of the plugs and one circuit with a dedicated neutral. That was before 2008 and the evil 210.4(B) though.
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
The circuit with separate neutral is often designated for computer use, because of harmonic concerns.
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Hendrix
Senior Member
- Location
- New England
because it isn't an office. It's a boxing facility.
ptonsparky
Tom
- Occupation
- EC - retired
MWC have been used forever and still are. Your SE is a MWC. AFAIK, it is not limited in use by the type of location. To borrow a term, the ‘hand wringing’ of their use has come about in the last few years.
The CBs need to be common trip or equiped with approved handle ties. The conductors of the circuit, including the neutral, need to be grouped in some manner at certain points in wireways. Taped, tagged or cable tied.
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