Standard: BS 7671 Table 4J4A Multi-core armoured 90 °C thermosetting insulated cables Aluminium conductors Conductor temperature: 90 °C Air Ambient temperature: 30 °C Ground Ambient temperature: 30 °C Conductor nominal cross- sectional area [mm²] Current-carrying capacities in [A] Reference Method C (Clipped direct) Reference Method E (in free air or in perforated cable tray horizontal or vertical) Reference Method F (direct in ground or in ducting in ground, in or around buildings) 1 two-core cable,single-phase AC or DC 1 three-core cable or 1 four-core cable three-phase AC 1 two-core cable,single-phase AC or DC 1 three-core cable or 1 four-core cable three-phase AC 1 two-core cable,single-phase AC or DC 1 three-core cable or 1 four-core cable three-phase AC 1 2 3 4 5 6 1 2 3 4 5 6 7 16 82 71 85 74 71 59 25 108 92 112 98 90 75 35 132 113 138 120 108 90 50 159 137 166 145 128 106 70 201 174 211 185 158 130 95 242 214 254 224 186 154 120 – 249 – 264 – 174 150 – 284 – 305 – 197 185 – 328 – 350 – 220 240 – 386 – 418 – 253 300 – 441 – 488