12 April 2019

Colour Code For Flexible And Non - Flexible Cable As Per NEC

The colour code for non – flexible as well as flexible cable as per NEC ( National Electrical Code - India ) is given as below.

Colour code for non – flexible cable


Single Phase AC
Phase
Red / Yellow / Blue

Neutral
Black
Three Phase AC
Phase R
Red

Phase Y
Yellow

Phase B
Blue

Protective / Earthing
Green / Yellow
DC Two wire
Positive
Red

Negative
Black



DC Three wire
Positive
Red

Middle
Black

Negative
Blue

Functional earth telecommunication
Cream

Colour code for flexible cable

Number of cores
Core
Colour of core
1
Phase
Brown

Neutral
Light blue

Protective or earthing
Green and Yellow
2
Phase
Brown

Neutral
Light blue
3
Phase
Brown

Neutral
Light blue

Protective / Earthing
Green and Yellow
4 / 5
Phase
Brown / Black

Neutral
Light blue

Protective / Earthing
Green and Yellow

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