Toptronic® Assistant — The Electrician's Field Toolbox

What it does

Each tool follows the rules of the standard you pick, so the numbers on screen match the numbers on your paperwork.

01Wire sizing

Pick the right conductor every time. Ampacity with ambient-temperature and grouping corrections, drawn from your national standard's own tables — from a simple lighting circuit to a heavy three-phase feeder.

02Wiring colour codes by country

Single-phase, three-phase and DC conductor colours side by side, with flags. Handy on imported equipment, cross-border jobs and older installations where the scheme has changed over the years.

03Breaker sizing

The 125% continuous-load rule, standard ratings and circuit-level checks — with the coordination between conductor and protective device made obvious before you sign off.

04Voltage drop

Check any run against your standard's limit, for single-phase and three-phase loads alike. See the result in volts and as a percentage, so long runs stop being a guessing game.

05National code checks

Dwelling-branch compliance pages that cite clause numbers — NEC, BS 7671, NF C 15-100, I.S. 10101, MSZ HD 60364 and more — so you know exactly which rule the check came from.

All the tools

Wire sizing

Ampacity with correction factors, per your national standard's tables.

Breaker sizing

Continuous-load rules and standard ratings, with circuit-level checks.

Voltage drop

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

Power & current

Single- and three-phase current, kVA, and transformer secondary current.

Motor full-load current

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

Lighting & energy

Lumen and fixture counts, with daily and monthly energy cost estimates.

Wiring colour codes

Conductor colours by country — single-phase, three-phase and DC views.

National standard checks

Dwelling-branch compliance with cited clause numbers for every standard.

Reference

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

Countries and languages

The app works in your language and applies the wiring rules of your country — one switch in Settings, no reinstall. Countries covered include:

GreeceHungaryIrelandNorwaySweden FinlandDenmarkPolandCzechiaAustria SwitzerlandUkraineVietnamBrazilFrance GermanyUnited KingdomUnited StatesCanadaAustralia South AfricaUnited Arab EmiratesSaudi ArabiaIndiaChina JapanNetherlandsBelgiumSpainPortugal ItalyRomaniaBulgariaSlovakiaSlovenia CroatiaSerbiaLithuaniaLatviaEstonia TurkeyIsraelMalaysiaSingaporeNew Zealand MexicoArgentinaChileColombiaPhilippines …and more being added with every release

Supported standards include

NEC (USA) · CE Code (Canada) · SANS 10142 (South Africa) · BS 7671 (UK) · I.S. 10101 (Ireland) · NF C 15-100 (France) · DIN VDE 0100 (Germany) · NEN 1010 (Netherlands) · RGIE/AREI (Belgium) · MSZ HD 60364 (Hungary) · OVE E 8101 (Austria) · ČSN 33 2000 (Czechia) · AS/NZS 3000 · SFS 6000 (Finland) · BEK 1082 (Denmark) · SS 436 40 00 (Sweden) · NEK 400 (Norway) · NIN (Switzerland) · REBT (Spain) · RTIEBT (Portugal) — plus standards across Asia-Pacific, the Middle East and Latin America.

Every calculation an electrician reaches for, in one clean toolbox