6241Y Cable

PVC insulated and sheathed single core flat wiring cable with bare CPC, 300/500V to BS 6004

6242B Cable

XLPE Insulated and OHLS(r) sheathed twin core flat wiring cable with bare CPC, 300/500V to BS7211.

6942XL Cable

Two core, XLPE insulated and PVC sheathed, armoured 600 / 1000V cables to BS 5467

6943LS Cable

Three core XLPE insulated & OHLS (R) sheathed, armoured to 600/1000V cables to BS6724.

6944XL Cable

Four core, XLPE insulated and PVC sheathed, armoured 600/1000V cables, to BS5467.

Amendment No. 2:2004 to BS 7671:2001 implements the cable colours introduced in the revision of European Harmonisation document HD 308S2: Identification of cores in cables and flexible cords, and agrees with BS EN 60446:2000 Basic and safety principles of the man-machine interface identification of conductors by colours or numerals.  The single-phase colours of red phase, black  neutral and green and yellow earth are replaced by brown phase, blue neutral and green-and-yellow earth.  These colours have been used in appliance flexible cables for 28 years.

Three phase colours will be brown black and grey with a blue neutral instead of red, yellow and blue with a black neutral.