Voltage Drop Calculator | Electrical Wire Voltage Loss Calculator
Calculate voltage drop in electrical wires and ensure your electrical installations meet NEC standards with our free online voltage drop calculator.
Category: Calculator
Voltage Drop Calculator
Calculate voltage drop in electrical wires based on current, wire length, size, and material. Ensure your electrical installations meet NEC standards.
NEC Voltage Drop Guidelines
- Branch Circuits: Voltage drop should not exceed 3%
- Feeders: Voltage drop should not exceed 5%
- Total (Feeder + Branch): Total voltage drop should not exceed 5%
Note: This calculator provides the one-way voltage drop. For total circuit drop, enter the full wire run length (source to load).