Reference guide for current carrying capacities for PVC twin and earth cables
Reference Method |
Description |
1/1mm2 |
1.5/1mm2 |
2.5/1.5mm2 |
4/1.5mm2 |
6/2.5mm2 |
10/4mm2 |
16/6mm2 |
---|---|---|---|---|---|---|---|---|
A |
Enclosed in conduit in insulated wall |
11.5 |
14.5 |
20 |
26 |
32 |
44 |
57 |
B |
Enclosed in conduit or trunking on a wall |
13 |
16.5 |
23 |
30 |
38 |
52 |
69 |
C |
Clipped direct |
16 |
20 |
27 |
37 |
47 |
64 |
85 |
100 |
Above plasterboard ceiling coved by insulation not exceeding 100mm thick |
13 |
16 |
21 |
27 |
34 |
45 |
57 |
101 |
Above plasterboard ceiling coved by insulation exceeding 100mm thick |
10.5 |
13 |
17 |
22 |
27 |
36 |
46 |
102 |
In stud wall in with insulation with cable touching inner wall |
13 |
16 |
21 |
27 |
35 |
47 |
63 |
103 |
In stud wall in with insulation with cable not touching inner wall |
8 |
19 |
13.5 |
17.5 |
23.5 |
32 |
42.5 |
Ratings shown are tabulated values from BS7671 Appendix 4 for 70°C PVC cables. Where appropriate, other rating factors must be applied.