color code

Status
Not open for further replies.
R

rmonroe

Member
We have a Electrical Contractor in running 480 Volt supply feeder to some equipment. Everything seem to be ok until we seen him using a blue wire for the 480 Volt power circuit. Is this allowed by the N.E.C.?
 
Re: color code

Yes, for general installations the NEC does not specify any color requirements for identification of the ungrounded conductors.

See section 110.15. 215.8, and 424.35 for a few exceptions. None which apply to your question.
 
Re: color code

I looked at your profile and it says Electrical Controls Tech. I think I might know why you are questioning the blue wire. If you deal with the NFPA-79 it says this:

14.2.4 Identification by Color for Other Conductors.

14.2.4.1* Ungrounded circuit conductors that remain energized when the supply disconnecting means is in the off position shall be consistently applied as either ORANGE or YELLOW. These color identifications shall be strictly reserved for this application only.

Exception No. 1: Internal wiring on individual devices purchased completely wired.

Exception No. 2: Where the insulation used is not available in the colors required (e.g., high temperature insulation, chemically resistant insulation).

14.2.4.2 Where color is used for identification, the color shall be used throughout the length of the conductor either by the color of the insulation or by color markers.

Exception: Multiconductor cables shall be permitted to be permanently reidentified at the time of installation.

14.2.4.3 The use of other colors for the purpose of identification shall be as follows:
(1) BLACK for ungrounded line, load, and control conductors at line voltage
(2) RED for ungrounded ac control conductors at less than line voltage
(3) BLUE for ungrounded dc control conductors
Click to expand...
As far as the NEC goes, as long as it's not green, white, or grey, it's ok. (see exceptions listed in post above)
 
Re: color code

Thanks for the reply, yes I was referring to the NFPA 79. 14.2 Identification of Conductors.

rmonroe
 
Status
Not open for further replies.
Top