Advanced Voltage Drop Calculator
Calculate voltage drop for electrical circuits to ensure safety and efficiency.
Circuit Parameters
Total Voltage Drop
0.00 V
Drop %
0.00%
Voltage at End
0 V
Status
OK
Voltage Analysis
Voltage Drop FAQ
What is voltage drop?
Voltage drop is the reduction in electrical potential (voltage) along the path of a current flowing through a conductor. It's a natural phenomenon caused by the wire's internal resistance. Think of it like water pressure dropping in a very long hose—the further the water travels, the lower the pressure at the end.
Why is managing voltage drop important?
Excessive voltage drop can cause several problems:
- Poor Performance: Lights may dim, heaters may not produce enough heat, and motors may run slower and hotter, shortening their lifespan.
- Wasted Energy: The lost voltage is converted into heat in the wire, which is wasted energy.
- Safety Hazard: In extreme cases, the heat generated can damage wire insulation and create a fire risk.
What is the NEC recommendation?
The National Electrical Code (NEC) recommends that the voltage drop for a branch circuit should not exceed 3% from the final overcurrent device to the furthest outlet. This ensures efficient and safe operation of equipment. This calculator uses the 3% threshold for its "Status" indicator.