Learn it, drill it, print it
Study and practice material for electrical apprentices — the circuits you have to understand, the maths you have to be quick at, and the words nobody defines for you in your first week. Start with the one skill everyone is quietly expected to have: read this tape to the nearest sixteenth.
This drill needs JavaScript to generate and mark questions. Turn it on to practice — the explanation below works either way.
Your most-used
Interactive wiring diagrams
Every diagram here is drawn from the electrical relationships up, so the interactive layer is the real thing rather than a hotspot pasted over a JPEG — toggle a switch and the light responds for the right reason. Here are a few; the full library has thirteen.
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3-way switch
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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Motor start/stop
Press Start and the seal-in latches the coil in.
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Series vs parallel
Pull a lamp from each and see the difference.
Drill until it is quick
The practice drills generate fresh problems and mark you on the spot — tape reading, trade math, fractions, Ohm's law, offsets and conversions — and keep a streak in your own browser. The trade math drill will even print a twenty-question worksheet with an answer key.
Look it up, print it out
The glossary explains the terms in plain language, the symbols and fittings indexes show you what things are called, and the formula sheets print clean to a pocket size — all built from public mathematics, with no code-book data reproduced anywhere.
Need the bending math instead of the theory? When you are actually at the bender, bentright.com does conduit offsets and saddles from the trigonometry.
Learn one thing a week
Now and then a new diagram, drill, or reference sheet goes up. Leave your email for a short heads-up when it does — no spam, no selling it on, one click to leave.