CompDX
Voltage Drop (3Φ)
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Formula
Vd = (√3 × K × I × L) / CM
Unit system
Imperial (feet)
Metric (metres)
Current
A
One-way length
ft
Source voltage
V
Material
Copper (K=12.9)
Aluminum (K=21.2)
Wire gauge
14 AWG
12 AWG
10 AWG
8 AWG
6 AWG
4 AWG
2 AWG
1 AWG
1/0 AWG
2/0 AWG
3/0 AWG
4/0 AWG
250 kcmil
350 kcmil
500 kcmil
Voltage drop
9.04
V
Drop percentage
1.88
%
Within NEC 3% recommendation.
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