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

Topic Options
Rate This Topic
#132632 - 10/13/01 03:47 PM British color code summary
pauluk Offline
Member
Registered: 08/11/01
Posts: 7520
Loc: Norfolk, England
For your reference all in one place, a summary of British wiring color codes ("colour" is the usual British spelling).

Note that the hot wire is officially called line or phase, colloquially known as "live." Ground is called "earth."


Original color code:
Live=red, neutral=black, earth=green


For 3-phase, original phase colors were:
Ph A=red, B=white, C=blue.

In 1965 this became:
Ph A=red, B=yellow, C=blue.

In accordance with comon European standards, flexible appliance cords adopted a new system from 1970:
Live=brown, neutral=blue, earth=green/yellow.


Fixed cables stayed the same, until a few years ago when green was replaced with green/yellow for earth.


Where "twin & earth" cable is used for a switch drop, the black is used for the switched live to the light. "Code" requires that the black be marked wit red tape at each end when used in this way, although this is frequently not done.
Top
Test Equipment:
Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement
Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement

Member Spotlight
Member Since: 12/24/00
Posts: 4259
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
0 registered (), 101 Guests and 13 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
Stack, Scotto, Freecrowder, clee512, Jdscott2005

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