Electrician's Field Toolbox

Size wires, select breakers, check voltage drop, look up motor full-load current, plan lighting, and validate dwelling circuits against your country's wiring standard — fully offline on Windows.

Download See supported standards
30+Country standards
12+Calculators
100%Offline
EN/FRLanguages

Features

Wire Sizing

Ampacity with ambient-temperature correction, per your national standard's tables.

Breaker Sizing

125% continuous-load rule and standard ratings, with circuit-level checks.

Voltage Drop

Per-standard limits for single-phase and three-phase runs.

Power & Current

1-phase and 3-phase current, kVA and secondary current for transformers.

Motor FLA

NEC 430.250 tables plus overload and short-circuit protection guidance.

Lighting & Energy

Lumens and fixture counts; daily and monthly energy cost estimates.

Wiring Colour Codes

Colour codes by country with flags — single-phase, three-phase and D.C. views.

National Standard Checks

Dwelling branch compliance pages citing clause numbers: NEC, BS 7671, NF C 15-100, I.S. 10101, MSZ HD 60364 and more.

Reference

Formulas, code sections and quick-reference cards for every supported standard.

Supported standards include