The following ampacities are based on typical industry standards (NEC/ICEA) for single-conductor copper cables rated at 90°C, buried in the ground or in underground ducts. Conductor Size (AWG/kcmil) 5kV Ampacity 15kV Ampacity 25kV / 35kV Ampacity #1 1/0 2/0 4/0 250 350 500 750 1000
If cables are bundled together or installed in areas with high ambient soil temperature, their ability to dissipate heat decreases. In these cases, you must apply , which effectively lower the allowable ampacity of the cable. Summary Checklist for Engineers medium voltage cable size chart
Ampacity varies based on installation method (air, duct, or direct burial) and ambient temperature. Always consult the manufacturer's specific data sheet. Key Factors in Selecting Your Cable Size 1. Voltage Drop The following ampacities are based on typical industry
