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#94867 08/16/05 07:04 PM
Joined: Feb 2005
Posts: 44
I had inspector tell me he wants a label on the front of the panel for 120/208 that say's
A phase black
B phase red
C phase blue
for 277/480
A phase brown
B phase orange
C phase yellow
He said this is a new code but the reference he gave didn't state this.

Is this something new? I always thought the color code was sort of a rule of thumb that all electricians knew the color code although I have seen some that use black, red, blue for everything.

[This message has been edited by boggerbutt2454 (edited 08-16-2005).]

2017 / 2014 NEC & Related Books and Study Guides
#94868 08/16/05 07:33 PM
Joined: Feb 2005
Posts: 693
Except for white, green, and gray, coloring is purely arbitrary. If anyone knows differently, please advise.

[This message has been edited by Larry Fine (edited 08-16-2005).]

Larry Fine
Fine Electric Co.
#94869 08/16/05 07:44 PM
Joined: Jan 2003
Posts: 4,391
The colors you choose are up to you, the NEC would allow purple, pink and brown for 480 volt.

However in some instances the NEC does require that the colors you choose to be listed at the panel.

In the 2002 NEC it applied only to multiwire branch circuits.

210.4 Multiwire Branch Circuits.(D) Identification of Ungrounded Conductors. Where more than one nominal voltage system exists in a building, each ungrounded conductor of a multiwire branch circuit, where accessible, shall be identified by phase and system. This means of identification shall be permitted to be by separate color coding, marking tape, tagging, or other approved means and shall be permanently posted at each branch-circuit panelboard.

Now in the 2005 it applies to all circuits in some buildings.

Look at 2005 - 210.5(C)

Bob Badger
Construction & Maintenance Electrician
#94870 08/16/05 09:54 PM
Joined: Nov 2000
Posts: 2,148
But in the 2005 code there is no requirement that each phase have a different color...only each system.

#94871 08/16/05 11:46 PM
Joined: Jul 2004
Posts: 9,646
You do still have this one;
110.15 High-Leg Marking.
On a 4-wire, delta-connected system where the midpoint of one phase winding is grounded to supply lighting and similar loads, the conductor or busbar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is orange in color or by other effective means. Such identification shall be placed at each point on the system where a connection is made if the grounded conductor is also present.

Greg Fretwell
#94872 08/16/05 11:53 PM
Joined: Feb 2005
Posts: 693
Absolutely right, GFret. My bad.

Larry Fine
Fine Electric Co.
#94873 08/17/05 01:43 AM
Joined: Jun 2004
Posts: 24
A lot of the fine points of our trade and codes hilighted here!
Really kind of a treat!
Thanks to all that contribute

#94874 08/17/05 06:23 PM
Joined: Feb 2005
Posts: 44
Thanks iwire, I must have read over 210.4 a couple of times and missed it each time. Like they say if it had been a snake it would have bit me.

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