Voltage Cable Calculator: Medium

This is where most manual calculations fail. The environment dictates the cable's capacity.

Specifies cables with extruded insulation for rated voltages from medium voltage cable calculator

Always round up. If the calculator suggests a 350 kcmil cable, and you are borderline on ampacity, moving to 500 kcmil provides a safety margin that saves energy losses over the 20+ year lifespan of the cable. This is where most manual calculations fail

Several medium voltage cable calculators are available, including: and you are borderline on ampacity

When you hit "Calculate," the tool runs three distinct checks. If any fail, the calculator upsizes the cable.