Protection

Voltage Drop Single Phase

VD = 2 imes I imes L imes R

Variables

VD Voltage Drop V
I Current A
L Cable Length m
R Resistance Ω/m
Open Active Power Calculator →

Engineering Example

A 20A load over 50m cable with resistance 0.001 Ω/m gives VD = 2 V.

Practical Site Example

Used when selecting cable size for long feeder runs.