Rising Edge Services, LLC
Easy Voltage Drop
Three Phase Voltage Drop, "VD" = (1.732 x K x I x L) / CM
Single Phase Voltage Drop, "VD" = (2 x K x I x L) / CM
Percent Voltage Drop, "%VD" = (VD / E) x 100
K = 12.9 for Copper, and K = 21.2 for Aluminum, when using Feet
K = 42.3 for Copper, and K = 69.5 for Aluminum, when using Meters
Voltage Drop Calculations:
Length in Feet, "L"
Choose Wire Size
Percent Voltage Drop Calculations:
Note: The constants are based on the ohms/km and ohms/kFT for 1000 kcmil wire in NEC Chapter 9, Table 8.