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3C MV Cable Ampacity

Below is 3C medium voltage (MV) cable ampacity table which can be used to select cable size.

Cross Section
(sqmm)
In Air
(A)
Underground
(A)
3C x 25142120
3C x 35170143
3C x 50203168
3C x 70250205
3C x 95304245
3C x 120348277
3C x 150392309
3C x 185448348
3C x 240524401

In order to properly apply ampacity data, cable construction shall be as below:

  • Standards: IEC 60502,
  • System voltage 6/10(12) kV, 50Hz,
  • Cable designation: Cu/XLPE/PVC/SWA 3C cable,
  • Underground Installation: Direct Buried,
  • Manufacturer: LS cable

See also: Electrical Cable StandardsCable constructionVoltage Drop Calculator

In addition, ambient conditions of cable installation shall be:

  • Ground temperature:                        30°C
  • Ambient air temperature:                  30°C
  • Ground thermal resistivity:                150°C x cm/W
  • Burial depth:                                   0.8 m