I'm wondering if this is code compliant. I saw a 277 volt lighting application, they used M/C cable and junction boxes in between conduit runs. The proper color as everyone knows for 277V is B.O.Y.. The M/C of course is black, red, white and green. Where the last connection to the fixture were in pipe they installed BOY as phased. Is this allowed, or do you have to have it tagged, or a continuous color? Any replys would be appreciated. TY
Hotline. I'm not sure what you missed.Let me try to clearify. They used 10/3 M/C cable in btween conduit runs. There was conduit leaving the panelboard using Brown, orange yellow to the 1st J.B. from that j.b was 10/3 M/C through the corridors to several j.bs where conduit was branched off to the outlet boxes where the lighting fixtures were attached, and this was brn, org, yellow, phased according to panelboard circuitry, IE: brown being ckt #1 Org being ckt # 3 on so forth. Just the mixing of colors was my concern.
It is most likely that there is a violation of 210.4(D) here. This section requires that where there are two or more voltage systems in a building, that all hots of multiwre branch circuits be identified as to phase and voltage. Don
Don, Rojosy, Interesting. The term "multiwire branch circuit" wasn't included in 210-4(d) until the '99 NEC. (Which has been adopted at long last here in CA less than 2 weeks ago) I guess that also means that no feeders must be color coded either, and that a 2 wire circuit can be any color you wish?...S
[This message has been edited by electure (edited 11-12-2002).]
Color Code. Where installed in raceways, as aluminum sheathed cable, as open work, or as concealed knob-and-tube work, the conductors of multi-wire branch circuits and two-wire branch circuits connected to the same system shall conform to the following color code. Three-wire circuits - one black, one white, one red; four-wire circuits - one black, one white, one red, one blue; five-wire circuits - one black, one white, one red, one blue, one yellow. Where more than one multi-wire branch circuit is carried through a single raceway the ungrounded conductors of the additional circuit may be of colors other than those specified. All circuit conductors of the same color shall be connected to the same ungrounded feeder conductor throughout the installation.
Abbott's NEC Handbook (Frank Stetka) adds the explanation:
The color coding of multi-wire banch-circuit conductors is necessary in order that the loads may be properly balanced between the ungrounded conductors.