Free for electrical apprentices and journeymen
Learn the electrical trade, one year at a time
Wiring diagrams you can switch and trace, a motor-control course you can run, drills that mark you on the spot, and tools that work in imperial or metric. Written plainly, from the trade — and never a substitute for your code book or your journeyman.
Search lessons, diagrams and tools… /Where are you?
- First-year apprentice Just started, or in first-period school 37 pages
- Second-year apprentice Past the basics, into commercial work 31 pages
- Third year Motors, three-phase and controls 29 pages
- Fourth year Getting ready for the exam 18 pages
- Journeyman refresher Ticketed — refreshing, or teaching 18 pages
Brand new, first week? Start here — the apprentice path takes you through it in order.
Vos plus utilisés
Organise my tools — pin, order, hide, make lists
Outils populaires
All 36 tools →- 3rd yearThree-phase
Calculateur de puissance triphasée
kW, kVA, kVAR and amps from any one of them, with voltage and power factor — three-phase or single.
- 3rd yearTransformers
Transformateur : courant à pleine charge et rapport
Primary and secondary full-load amps, line and turns ratio, and the current in each winding for delta or wye.
- 3rd yearMotors
Vitesse synchrone et glissement d’un moteur
Synchronous speed from frequency and poles, the pole count a nameplate speed implies, slip and rotor frequency.
- 3rd yearThree-phase
Conversion d’impédance triangle ↔ étoile
Turn a delta of three impedances into the equivalent wye, or back — balanced or not.
- 1st yearDrills
Exercice sur la loi d’Ohm
Solve for V, I, R or P at three levels, marked on the spot.
- 1st yearDrills
Test du ruban à mesurer
Read a tape to the nearest 1/16", timed or free practice.
Interactive wiring diagrams
All diagrams →Drawn from the circuit up, so the interactive layer is the real thing — flip a switch and the light responds for the right reason.
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Interrupteur à 3 voies
Two switches, one light — toggle each and trace the travellers.
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GFCI
Trip it and watch the load die while the line stays hot.
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Interrupteur à 4 voies
Three switch points: what the 4-way does to the travellers.
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Série ou parallèle
Pull a lamp from each and see the difference.
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Sous tension, neutre, mise à la terre
Three conductors by the job each does. Press the fault.
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Marche/arrêt d’un moteur
The three-wire station and its seal-in, running.
Read this tape
The one skill every first day assumes. Read it to the nearest sixteenth and keep a streak going — then try the other drills: Ohm’s law, series and parallel, fractions, conversions and offsets.
The motor control course
Twelve lessons from reading a ladder diagram to finding a hidden fault with a meter — every circuit runs in the page. Start the course.
Look it up
The glossary, symbols, printable formula sheets and the on-the-job basics are all under Reference. No code-book tables are reproduced anywhere: where a value comes from the code, you type it from your own copy.
Cette visite
- Niveau
- Réponses
- Bonnes réponses
- Série
- Record
- Dernière ronde
Garder ces résultats
Nous envoyons ce seul courriel par notre fournisseur de courriel et ne gardons pas votre adresse, à moins que vous cochiez la case.
Nous envoyons ce seul courriel par notre fournisseur de courriel et ne gardons pas votre adresse.
Cet exercice a besoin de JavaScript pour générer et corriger les questions. Activez-le pour vous exercer — l’explication ci-dessous fonctionne dans les deux cas.
At the bender? bentright.com does conduit offsets and saddles. Doing a take-off? fieldcalc.net does the material numbers.
Un petit mot sur les outils qui vous conviennent — par courriel, facultatif
Laissez votre courriel et cochez la case pour un petit mot, au plus toutes les deux semaines, sur les outils, exercices et schémas qui vont avec ce que vous étudiez — ici et sur bentright.com et fieldcalc.net. Une seule liste pour les trois, un clic pour la quitter, et rien n’est envoyé avant que vous confirmiez depuis votre boîte de réception.