Electric Cable Size vs. Current Rating
Amps vs. cable size for fixed installations in buildings.
The table below indicates current ratings for fixed cable installations within buildings. The table is based on PVC-wiring and PVC-insulated cables - single wire, fine wires and multi stranded wires.
| Installation Method | A1 | A2 | B1 | B2 | ||||
|---|---|---|---|---|---|---|---|---|
| Installation | Single core cables, in insulating tubes, in thermally insulated walls | Multi core sheathed cables, in insulating tubes, in thermally insulated walls | Single core cables, in insulating tubes, on walls | Multi core cables, or multi core sheathed cables, in insulating tubes, on walls | ||||
|
Number of Cores | 2 | 3 | 2 | 3 | 2 | 3 | 2 | 3 |
| Cross-Section (mm2) | Current Ratings (ampere) | |||||||
| 1.5 | 15.5 | 13.5 | 15.5 | 13.0 | 17.5 | 15.5 | 16.5 | 15.0 |
| 2.5 | 19.5 | 18.0 | 18.5 | 17.5 | 24 | 21 | 23 | 20 |
| 4 | 26 | 24 | 25 | 23 | 32 | 28 | 30 | 27 |
| 6 | 34 | 31 | 32 | 29 | 41 | 36 | 38 | 34 |
| 10 | 46 | 42 | 43 | 39 | 57 | 50 | 52 | 46 |
| 16 | 61 | 56 | 57 | 52 | 76 | 68 | 69 | 62 |
| 25 | 80 | 73 | 75 | 68 | 101 | 89 | 90 | 80 |
| 35 | 99 | 89 | 92 | 83 | 125 | 110 | 111 | 99 |
| 50 | 119 | 108 | 110 | 99 | 151 | 134 | 133 | 118 |
| 70 | 151 | 136 | 139 | 125 | 192 | 171 | 168 | 149 |
| 95 | 182 | 164 | 167 | 150 | 232 | 207 | 201 | 179 |
| 120 | 210 | 188 | 192 | 172 | 269 | 239 | 232 | 206 |
| 150 | 240 | 216 | 219 | 196 | ||||
| 185 | 273 | 245 | 248 | 223 | ||||
| 240 | 320 | 286 | 291 | 261 | ||||
| 300 | 367 | 328 | 334 | 298 | ||||
- operating temperature max. 70 oC
- ambient temperature max. 70 oC
- A1 - Single core cables in a conduit in a thermally insulated wall
- A2 - Multi core cable or multi-core sheathed cable in a conduit in a thermally insulated wall
- B1 - Single core cables in conduit or wall
- B2 - Multi core cable or multi-core sheathed cable in a conduit in a wall
