Voltage Drop Calculator by Wire Size
Voltage drop by wire size checks the selected AWG or kcmil conductor against one-way length, load current, system voltage and the target percent drop.
voltage drop calculator wire size wire size voltage drop calculator awg voltage drop calculator
Voltage drop shortcut
VD = M * K * I * L / CM
Percent drop
drop_percent = 100 * VD / V_system
Conductor-size caution
The suggested size is only a voltage-drop screen. Ampacity, temperature correction, conductor count, protection, conduit fill and grounding remain separate checks.
Related pages
- Transformer kVA calculator - load kVA, design margin and standard size rounding.
- Conduit fill calculator - raceway fill from conductor count, area and conduit size.
- Voltage drop calculator - feeder voltage drop and conductor-size screening.
- Short-circuit current calculator - available fault current from transformer impedance.