Building Systems Design2D
Electrical Systems for Buildings - Examples & Applications - Voltage Drop
Fundamentals of building electrical systems, power distribution, and lighting design.
Open the complete lessonVoltage Drop Calculator
Simulate single-phase voltage drop over a run of copper wire.
230 V
15 A
30 m
Results
Voltage Drop:5.72 V
Percentage Drop:2.49 %
End Voltage:224.28 V
Code Compliant (≤ 3%)
NEC recommends a maximum of 3% voltage drop for branch circuits and 5% total drop for feeders + branch circuits.