Voltage Drop Calculator

This calculation is applicable only to Copper-Sheathed MI Wiring cable.

Number of Conductors	Choose Value Single Conductor Multi Conductor	These calculated voltage drops represent line to line voltage drop in a 3-phase system. To estimate the single phase voltage drop, simply multiply the 3 phase line to line voltage drop by 1.16. In the rare instances where line to neutral voltage drop in a three phase system is required, multiply the 3 phase line to line voltage drop by 0.58. * Load current is used for voltage drop calculations, but conductor size must be chosen based on calculated ampacity with safety factors as required by code.
Load Current *	amperes
Conductor Size *
System Voltage
Power Factor	Choose Value 30 70 75 80 85 90 95 100  %
Run Length from Source to Load	feet
Fire Zone Length (optional)	feet

Note: Ensure all the applicable requirements of the National and Local Electrical Codes are met.