Conductor sizing
Parallel Conductor Sizing Calculator
Compare identical parallel conductor sets for per-set current and estimated two-wire voltage drop.
Identical parallel conductor sets
Enter load and conductor data
A
V
ft
Ω/kft
sets
A
Entered parallel ampacity covers load
Parallel-set load and drop
100.0 A per set
Total adjusted ampacity480.0 A
Loop voltage drop10.00 V
Voltage-drop percentage2.08%
Screening estimate onlyAssumes identical conductors, equal sharing, and matching route lengths. Enter ampacity after installation corrections. Verify permitted conductor sizes, parallel installation requirements, raceway arrangement, terminations, and manufacturer conditions.
About this calculator
Compare identical parallel conductor sets for per-set current and estimated two-wire voltage drop.
Method and assumptions
Current per set = total current ÷ identical parallel sets. Loop voltage drop uses that per-set current, twice the one-way length, and entered one-conductor resistance.