Voltage Drop

Estimate voltage drop over a wire run in copper or aluminum. Enter the load current, one-way length, wire gauge, conductor type, and system voltage. See how much voltage you lose so you can stay within code limits on branch and feeder runs. Adjust wire size or length and compare results quickly.

Current

A

One-way length

ft

Conductor size14 AWG12 AWG10 AWG8 AWG6 AWG4 AWG3 AWG2 AWG1 AWG1/0 AWG2/0 AWG3/0 AWG4/0 AWG250 kcmil300 kcmil350 kcmil400 kcmil500 kcmil600 kcmil750 kcmil

MetalCopperAluminum

SystemSingle-phase / DCThree-phase

System voltage

V

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