Calculator Library
Professional-grade electrical calculators built for speed, accuracy, and compliance with the Thai Electrical Code (EIT) and IEC standards.
Cable Sizing
Copper PVC / XLPE cable size from the Thai Electrical Code ampacity tables, with ambient and grouping correction for conduit, wall, insulators, buried runs and cable tray, plus a voltage drop check.
Breaker Sizing
Pick the breaker rating so that Ib ≤ In ≤ Iz, with branch-circuit, minimum-conductor, breaking-capacity and MEA / PEA service-entrance checks.
Voltage Drop
Single- and three-phase feeder voltage drop with conductor resistance at operating temperature, reactance and power factor, plus the minimum size for a drop limit and a PDF report.
Design Circuits You Can Defend
"Every cable size and breaker rating should trace back to a table and a clause. Our tools show both, so the reviewer sees exactly what you saw."