Construction & DIY
Voltage Drop Calculator
Calculate voltage drop, percentage, and voltage at the end of the circuit to ensure compliance with NEC guidelines.
Circuit Details
Engineering Guidelines
NEC Voltage Drop Recommendations:
- Max 3%: For branch circuits (from breaker panel to the furthest outlet/load).
- Max 5%: Total voltage drop for both feeders and branch circuits combined.
Why it matters: Excessive voltage drop can cause motors to run hot, lights to flicker or dim, and electronic equipment to malfunction or shut down.
Formulas Used
Standard K-Factor Method
Circuit Results
Voltage Drop Percentage
0.00%
Waiting for input
Actual Voltage Drop
0.00 V
Voltage at End of Circuit (Load)
0.00 V
Cross-Sectional Area Used
0 Circular Mils
NEC Compliance Meter
Max 3% limit
Awaiting calculation