Voltage Drop

Written by Jerry Ratzlaff on . Posted in Electrical Engineering

Voltage drop, abbreviated as VD, is the electricity between the meter and where it is be used.  It is basically impossible to have no voltage loss. 

 

Voltage Drop formulas

\(\large{ VD =  \frac{2\;K\;I\;L}{cmil}    }\)  (single-phase)
\(\large{ VD =  \frac{1.732\;K\;I\;L}{cmil}    }\) (three-phase)

Where:

\(\large{ VD} \) = voltage drop

\(\large{ cmil} \) = conductor cross-section area in circular mil

\(\large{ I } \) = connected load current (amps)

\(\large{ L } \) = length of conductor from source to load, one-way (feet)

\(\large{ K } \) = constant, ohms-cmil per ft

 

Tags: Equations for Electrical