Electrical Wire Color Code Chart – IEC | NEC | CEC

Electrical Wire Color Code Chart

Today I am writing about the electrical wire color code, As you know that in electrical wiring we used different types of colors which help the electrician to do his connection easily. There are different wire identification standards and some of them rely on color codes. Not all the electrical wiring wires color codes are the same and it depends on your location, voltage, installation type and also some other factors. Many electricians did not follow the color code but if we follow the color code, it’s make work easy and further maintenance will be easier.

As I have already written that there are different standards and colour codes according to your location, the wire colour code can be different according to your location. However, I will share some electrical wire colurs codes here.

 

electrical wire color code

 

 

 

U.S Electrical Wiring Color Codes

 

In the United States, the following color codes are typically used for electrical wires, in which mostly black, red, blue are used phase1,2,3, white for neutral and Green, Green with yellow stripe, or bare wire for Ground or earthing wire.

 

120/240 volt AC Wire Colors Code

These coloars are common in-home or for office use.

 

  • Ground – Green, Green with Yellow Stripe, or Bare Wire
  • Neutral- White
  • Phase 1 – Black
  • Phase 2 – Red
  • Phase 3 – Blue

Complete US National Electrical wire color code (NEC) with Common and Alternative Color

Function 

Label

Common Color

Alternative color

Line Single Phase

L

black or red

Neutral 

N

white

grey

Ground – Earthing

G

bare, green, or green-yellow

green

Line 3 phase

L1

black

brown

Line, 3 phase

L2

red

orange

Line, 3 phase

L3

blue

yellow

Canadian Electric Code (CEC)

Canda AC electrical wire color codes is given below

 

Function 

Label

Wire color

Line Single Phase

L

black or red

Neutral 

N

white

Ground – Earthing

G

green or green-yellow

Line 3 phase

L1

red

Line, 3 phase

L2

black

Line, 3 phase

L3

blue

 

International Electrical Wiring Wires color codes

 

The electrical color code is used according to location, in some areas, an electrical wire color code is specified by law. Different electrical wires color codes are popular in different areas locations.

European (IEC) Internation electrotechnical commission wire color codes

 

International Electrical Wiring Wires color codes

 

 

Function Label New IEC Color Old IEC Color
Line, 3-phase L1 brown brown or black
Line, 3-phase L2 brown brown or black
Line, 3-phase L3 brown brown or black
Earth G green-yellow green-yellow
green-yellow L brown brown or black
Neutral N blue blue

 

IEC DC electric wire color code

 

Function

Label

Color

Ground – Earth

G or E

green-yellow

2-Wire Unearthed DC Power System

Negative

L-

grey

Positive

L+

brown

2-Wire Earthed DC Power System

Negative (of a positive earthed) circuit

L-

grey

Positive (of a positive earthed) circuit

M

blue

Negative (of a negative earthed) circuit

M

blue

Positive (of a negative earthed) circuit

L+

brown

3-Wire Earthed DC Power System

Positive

L+

brown

Negative

L-

blue

Mid-wire

M

grey

 

Pakistan And India Electrical wire color codes

In Pakistan/india mostly used the below electrical color codes, but note that the below color codes not according any law.

 

Function

Lable

Color

Line single-phase

L

Red or orange

Neutral

N

Black

Ground – Earth

G or E

Green or green-yellow

3 phase

L1

Red

L2

Yellow

L3

Blue

DC Positive

DC +

Red

DC Negative

DC –

Black or Blue

 

Some time electrical did not use the wire color codes and it’s use different color wires so before work some maintenance in electrical wiring installation. make sure to test before all-electric wires using a multimeter or other testing devices.
Note that date in electrical machines, the color of wires can be different, so before work, first read the company provided data sheet and diagram.

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