Non-Flexible Cable Core Colors

Function

Rubber or p.v.c. Determining the colors of the tubing or disc inserted into the insulated, non-flexible cable core or bare conductor or cable core

Grounding

Yellow-and-green or green *

Single-phase a.c. circuit live end

Red (or yellow or blue * *)

Single-phase or 3-phase a.c. circuit neutral end

Black

3-phase a.c. circuit R-phase

Red

3-phase a.c. circuit Y-phase

Yellow

3-phase a.c. circuit B-phase

Blue

2nd wire d.c. circuit positive end

Red

2nd wire d.c. circuit negative end

Black

2-wire d.c. circuit (positive or negative outer conductor

Red

3rd tel d.c. circuit positive end

Red

3rd tel d.c. circuit middle end

Black

3rd tel d.c. circuit negative end

Blue

5-core armored p.v.c. fifth of the cable

(special purpose) vessel

Orange