PVC Insulated Cables for Switchgear and Control Gear Wiring BS6231
BU, BR, CU, CR, BK and CK
These cables are for use at alternating voltages not exceeding 600V to earth and direct voltages not exceeding 1000V to earth.
The conductors are plain annealed copper.
| Type | Area | Conductor | Nom r/t | Max Diam | Max Temp |
| (mm²) | (No/mm) | (mm) | (mm) | C | |
| BU | 1 | 1/1.13 | 0.8 | 3.2 | 70 |
| 1.5 | 1/1.38 | 0.8 | 3.5 | 70 | |
| 2.5 | 1/1.78 | 0.8 | 3.9 | 70 | |
| BR | 1 | 7/0.44 | 0.8 | 3.3 | 70 |
| 1.5 | 7/0.53 | 0.8 | 3.6 | 70 | |
| 2.5 | 7/0.67 | 0.8 | 4.2 | 70 | |
| 4 | 7/0.85 | 0.8 | 4.8 | 70 | |
| 6 | 7/1.04 | 0.8 | 5.4 | 70 | |
| 10 | 7/1.35 | 1.0 | 6.8 | 70 | |
| 16 | 7/1.70 | 1.0 | 8.0 | 70 | |
| 25 | 7/2.14 | 1.2 | 9.8 | 70 | |
| 35 | 19/1.35 | 1.2 | 11.0 | 70 | |
| 50 | 19/1.78 | 1.4 | 13.0 | 70 | |
| 70 | 19/2.14 | 1.4 | 15.0 | 70 | |
| 95 | 37/1.78 | 1.6 | 17.0 | 70 | |
| 120 | 37/2.03 | 1.6 | 19.0 | 70 | |
| 150 | 37/2.23 | 1.8 | 21.0 | 70 | |
| 185 | 37/2.52 | 2.0 | 23.5 | 70 | |
| 240 | 61/2.25 | 2.2 | 26.5 | 70 | |
| CU* | 1 | 1/1.13 | 0.8 | 3.2 | 90 |
| 1.5 | 1/1.38 | 0.8 | 3.5 | 90 | |
| 2.5 | 1/1.78 | 0.8 | 3.9 | 90 | |
| CR* | 1 | 7/0.44 | 0.8 | 3.3 | 90 |
| 1.5 | 7/0.53 | 0.8 | 3.6 | 90 | |
| 2.5 | 7/0.67 | 0.8 | 4.2 | 90 | |
| 4 | 7/0.85 | 0.8 | 4.8 | 90 | |
| 6 | 7/1.04 | 0.8 | 5.4 | 90 | |
| 10 | 7/1.35 | 1.0 | 6.8 | 90 | |
| 16 | 7/1.70 | 1.0 | 8.0 | 90 | |
| 25 | 7/2.14 | 1.2 | 9.8 | 90 | |
| 35 | 19/1.35 | 1.2 | 11.0 | 90 | |
| 50 | 19/1.78 | 1.4 | 13.0 | 90 | |
| 70 | 19/2.14 | 1.4 | 15.0 | 90 | |
| 95 | 37/1.78 | 1.6 | 17.0 | 90 | |
| 120 | 37/2.03 | 1.6 | 19.0 | 90 | |
| 150 | 37/2.23 | 1.8 | 21.0 | 90 | |
| 185 | 37/2.52 | 2.0 | 23.5 | 90 | |
| 240 | 61/2.25 | 2.2 | 26.5 | 90 |
*Manufactured using Heat Resisting PVC
| Type | Area | Conductor | Nom r/t | Max Diam | Max Temp |
| (sq.mm) | (mm) | (mm) | (mm) | C | |
| BK | 0.5 | 16/0.2 | 0.8 | 3.0 | 70 |
| 0.75 | 24/0.2 | 0.8 | 3.2 | 70 | |
| 1 | 32/0.2 | 0.8 | 3.4 | 70 | |
| 1.5 | 30/0.25 | 0.8 | 3.7 | 70 | |
| 2.5 | 50/0.25 | 0.8 | 4.2 | 70 | |
| 4 | 56/0.3 | 0.8 | 4.8 | 70 | |
| 6 | 84/0.3 | 0.8 | 6.3 | 70 | |
| 10 | 80/0.4 | 1.0 | 7.8 | 70 | |
| 16 | 126/0.4 | 1.0 | 9.0 | 70 | |
| 25 | 196/0.4 | 1.2 | 11.5 | 70 | |
| 35 | 276/0.4 | 1.2 | 13.0 | 70 | |
| 50 | 396/0.4 | 1.4 | 15.0 | 70 | |
| 70 | 360/0.5 | 1.4 | 17.5 | 70 | |
| 95 | 475/0.5 | 1.6 | 19.5 | 70 | |
| 120 | 608/0.5 | 1.6 | 21.5 | 70 | |
| 150 | 756/0.5 | 1.8 | 24.0 | 70 | |
| 185 | 925/0.5 | 2.0 | 26.5 | 70 | |
| 240 | 1221/0.5 | 2.2 | 30.0 | 70 | |
| CK* | 0.5 | 16/0.2 | 0.8 | 3.0 | 90 |
| 0.75 | 24/0.2 | 0.8 | 3.2 | 90 | |
| 1 | 32/0.2 | 0.8 | 3.4 | 90 | |
| 1.5 | 30/0.25 | 0.8 | 3.7 | 90 | |
| 2.5 | 50/0.25 | 0.8 | 4.2 | 90 | |
| 4 | 56/0.3 | 0.8 | 4.8 | 90 | |
| 6 | 84/0.3 | 0.8 | 6.3 | 90 | |
| 10 | 80/0.4 | 1.0 | 7.8 | 90 | |
| 16 | 126/0.4 | 1.0 | 9.0 | 90 | |
| 25 | 196/0.4 | 1.2 | 11.5 | 90 | |
| 35 | 276/0.4 | 1.2 | 13.0 | 90 | |
| 50 | 396/0.4 | 1.4 | 15.0 | 90 | |
| 70 | 360/0.5 | 1.4 | 17.5 | 90 | |
| 95 | 475/0.5 | 1.6 | 19.5 | 90 | |
| 120 | 608/0.5 | 1.6 | 21.5 | 90 | |
| 150 | 756/0.5 | 1.8 | 24.0 | 90 | |
| 185 | 925/0.5 | 2.0 | 26.5 | 90 | |
| 240 | 1221/0.5 | 2.2 | 30.0 | 90 |
*Manufactured using Heat Resisting PVC
All dimensions are nominal unless otherwise specified
Bunched conductor constructions are nominal and may vary slightly in the number of strands and/or strand diameter