Solar Wire Sizer NEC 690.8

Wire Sizing for Solar PV per NEC 690.8 Ampacity # What it does Calculates required AWG / kcmil wire size for PV DC and AC conductor runs per NEC 690.8: maximum circuit current 125% of Isc, then BOTH printed checks of 690.8(B) — base ampacity vs 156% and temperature/bundling-corrected ampacity vs 125%. # Features - Module Isc input - Max circuit current = Isc x 1.25 (NEC 690.8(A)(1)) - Two-step ampacity check per NEC 690.8(B)(1) and (B)(2) - Copper and aluminum conductors, 14 AWG to 500 kcmil - Conductor temperature rating (60/75/90°C) - Multiple conductor adjustment (NEC 310.15(C)(1)) - Ambient temperature correction (NEC 310.15(B)(1)) - Adjusted ampacity vs required current - AWG / kcmil result with safety margin # Made for Solar installers, electrical contractors, PV technicians, code inspectors, apprentice electricians. # Optional Pro Upgrade — $2.99 one-time The following features require a separate one-time in-app purchase. They are not required to use the calculator: - Calculation history (saved & searchable) - PDF report export with NEC references - Dark theme - Ad-free experience