Electric Cable Size vs. Current Rating
Amps vs. cable size for fixed installations in buildings.
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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
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