The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Parking lot pole light swap....
by gfretwell
10/24/16 08:46 PM
International Wire Colour Codes
by Tjia1981
10/23/16 12:08 PM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm² flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 14
HotLine1 7
ghost307 7
renosteinke 6
Potseal 4
Who's Online
0 registered (), 259 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#80093 - 02/26/02 07:34 AM Phase Identification
Paul@RBEC Offline
Junior Member

Registered: 02/25/02
Posts: 3
Loc: Conover, NC, USA
Is there a defined standard for the identification of Phases in a service, feeders and branch circuits? We have use BLUE, RED, YELLOW tape in the past for feeders but I noticed a Master Electrician carrying an index card in his wallet with various color standards for different applications. Is there a code reference on this? or just secrets of the trade?

2014 / 2011 NEC & Related Books and Study Guides
#80094 - 02/26/02 08:28 AM Re: Phase Identification
Tom Offline

Registered: 01/01/01
Posts: 1069
Loc: Shinnston, WV USA
There is no standard that I know of. Here's what seems to be popular

Black, red 120/240 single phase
black, orange & blue 120/240 3 phase
black, red, blue 120/208 3 phase
brown, orange, yellow 480 volt 3 phase
Few things are harder to put up with than the annoyance of a good example.

#80095 - 02/27/02 08:50 AM Re: Phase Identification
Redsy Offline

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
Ditto, Tom.
Remember the Orange goes on the high leg of the 240 volt 3phase 4wire delta.

#80096 - 02/27/02 10:06 AM Re: Phase Identification
Joe Tedesco Offline

Registered: 10/07/00
Posts: 3325
Loc: Boston, Massachusetts USA
424.35 Marking of Heating Cables.
Each unit shall be marked with the identifying name or identification symbol, catalog number, and ratings in volts and watts or in volts and amperes.
Each unit length of heating cable shall have a permanent legible marking on each nonheating lead located within 75 mm (3 in.) of the terminal end. The lead wire shall have the following color identification to indicate the circuit voltage on which it is to be used:
(1) 120 volt, nominal — yellow
(2) 208 volt, nominal — blue
(3) 240 volt, nominal — red
(4) 277 volt, nominal — brown
(5) 480 volt, nominal — orange

Color code
Branch circuits, 210.4(D), 210.5
Conductors, 310.12, 504.80(C),
Grounded conductor, 200.6
Grounding conductor, 250.119,
310.12(B), 400.23
Heating cables, 424.35
Higher voltage to ground
Feeders, 215.8
Panel boards, 408.3(E)
Sensitive electronic equip-ment,
Service-entrance conductors,
Joe Tedesco, NEC Consultant


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals