Earth Cable Sizing Chart [new] -

: Often requires 25 mm² to 95 mm² to handle high fault currents from heavy machinery.

Industrial machine, 400 V three-phase, 100 A breaker (thermal-magnetic, trip time 0.2 s at 5 kA fault). Cable length 50 m. Copper conductor, PVC insulation. Local standard: IEC. earth cable sizing chart

| Rating of OCPD (A) | Minimum copper earth csa (AWG / kcmil) | mm² approx. | |--------------------|------------------------------------------|--------------| | 15 | 14 AWG | 2.1 | | 20 | 12 AWG | 3.3 | | 30 | 10 AWG | 5.3 | | 40-60 | 10 AWG | 5.3 | | 100 | 8 AWG | 8.4 | | 200 | 6 AWG | 13.3 | | 400 | 3 AWG | 26.7 | | 600 | 1 AWG | 42.4 | | 800 | 1/0 AWG | 53.5 | | 1200 | 3/0 AWG | 85.0 | | 1600 | 250 kcmil | 126.7 | | 2000 | 350 kcmil | 177.3 | : Often requires 25 mm² to 95 mm²