Circuit Parameters
A
ft
V
Drop Threshold Gauge
Voltage Drop (%)--%
0%3%5%
Awaiting Input
Voltage Drop Analysis
Voltage Drop %
--%
Actual Drop (Vloss)
--V
Power Loss (Ploss)
--W
Recommended Next Gauge
--
NEC Reference
Single‑phase Vdrop = 2 · L · I · R1000ft / 1000
Maximum recommended drop: 3% for branch circuits (NEC 210.19 A, FPN No.4)
Resistance values from NEC Chapter 9, Table 8 (75°C)
Aluminum resistance = Copper × 1.64
Voltage Profile Along Conductor
Power Loss vs. Gauge (Relative)