Size Chart | Medium Voltage Cable

On long runs, the resistance of the cable causes voltage to drop by the time it reaches the load. For MV systems, it is standard practice to keep the voltage drop below . If your run is exceptionally long, you may need to "upsize" the cable beyond what the ampacity chart suggests. 2. Short Circuit Rating

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 medium voltage cable size chart

| User | Usefulness | Caution | |------|------------|---------| | | ⭐⭐⭐⭐⭐ | Already knows derating factors | | Industrial Electrician | ⭐⭐⭐⭐ | Often forgets shield bonding impact | | Solar/BESS Designer | ⭐⭐⭐ | Must ensure chart includes DC vs. AC (MV AC is typical) | | HVAC Technician | ⭐⭐ | Likely to mistake MV for low voltage – dangerous | On long runs, the resistance of the cable