House-Wire Size Calculator
Estimate the right copper wire size for a home or building circuit, and the matching APAR wire. Based on Indian practice (IS 732 / IS 694), 230 V single-phase and 415 V three-phase.
⚠️ Guidance only. This estimate assumes copper conductors in conduit at normal ambient temperature, a 1.25× design margin and ≤3% voltage drop. Actual sizing depends on installation method, grouping, ambient temperature and local regulations. Always have the final design and installation confirmed by a licensed electrician.
