Parallel Conductor Ampacity Worksheet
Parallel conductor ampacity starts with one conductor path, applies derating and terminal limits, then multiplies the usable value by the number of parallel paths.
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Adjusted per-conductor ampacity
I_adj_each = I_base_each * F_temp * F_count * F_other
Usable total
I_total = min(I_adj_each, I_terminal) * F_share * N_parallel
Design-load check
utilization = I_design / I_total
Related pages
- Parallel conductor ampacity calculator - live total ampacity and utilization screen.
- Ampacity derating calculator - single-path correction and adjustment factors.
- Voltage drop calculator - long-feeder conductor drop screen.
- Grounding conductor size calculator - equipment grounding conductor follow-up.