3- Phase Voltage Drop Calculator
3-phase, 3 conductors in raceway at 75C

by electrician2.com

                   Select Size
(size with 75C amperes for copper/aluminum)  

                   Enter Voltage  (> 0 & <= 600) 

                   Enter Power Factor (>0.1 & <=1.0) 

  Enter one-way circuit length in feet ( >0 & <=25000) 

 Enter Load in amperes (>=0.1 & <=475.5) 

When Power factor = 1.0   Z is equal to AC Resistance from Table 9
3-ph Voltage Drop and Impedance Z in ohms per 1000 ft. for uncoated Copper conductors using values from NEC Chapt 9, Table 9

PVC conduit

VD Z

Percent VD

Aluminum conduit

VD Z

Percent VD

Steel conduit

VD Z

Percent VD
 
3-ph Voltage Drop and Impedance  Z in ohms per 1000 ft. for Aluminum conductors using values from NEC Chapt 9, Table 9

PVC conduit

VD Z

Percent VD

Aluminum conduit

VD Z

Percent VD

Steel conduit

VD Z

Percent VD
 
3-ph Voltage Drop for uncoated Copper conductors using DC resistance Rdc in ohms per 1000 ft. from NEC Chapt 9, Table 8

Voltage Drop

 Rdc

Percent VD

 Voltage at load

CMA

            Exact K
 
3-ph Voltage Drop for Aluminum conductors using  DC resistance Rdc in ohms per 1000 ft. from NEC Chapt 9, Table 8

Voltage Drop

 Rdc

Percent VD

 Voltage at load

CMA

              Exact K