Multi-core cables - Colour code for core pairs "TP"
IC UL/CSA
| Core | Pair of wires | Code |
|---|---|---|
| 1 | black - brown | bk - bn |
| 2 | red - orange | rd - or |
| 3 | yellow - green | ye - gn |
| 4 | blue - violet | bu - vt |
| 5 | grey - white | gy - wh |
| 6 | white/black - white/brown | wh/bk - wh/bn |
| 7 | white/red - white/orange | wh/rd - wh/or |
| 8 | white/yellow - white/green | wh/ye - wh/gn |
| 9 | white/blue - white/violet | wh/bu - wh/vt |
| 10 | white/green - brown/black | wh/gn - bn/bk |
| 11 | brown/red - brown/orange | bn/rd - bn/or |
| 12 | brown/yellow - brown/green | bn/ye - bn/gn |