AC Systems
120V Voltage DropCalculator
Calculate voltage drop for 120V ac systems
AC Circuit Parameters
NEC Chapter 9 Table 9 values
Calculation Results
Review
Voltage Drop
4.41V
3.67%
Voltage at Load
115.6V
of 120V source
Power Loss
48 W
Warning - Consider larger wire size
120V Applications
- •Residential branch circuits
- •Lighting circuits
- •Small appliance circuits
- •Outdoor lighting
- •Garage and workshop wiring
- •HVAC equipment
AC Formula
Single Phase:
Vd = 2 × I × Z × L / 1000
Three Phase:
Vd = √3 × I × Z × L / 1000