Reference
The shelf to look things up on: words, symbols, fittings, the formula sheets and the plain basics of the job. None of it reproduces code-book tables — where a value comes from the code, you are pointed back to your own copy.
Words and symbols
What things are called, drawn and defined — the vocabulary nobody explains in week one.
- Glossary The trade vocabulary in plain language, with a first-week group.
- Electrical symbols Schematic symbols drawn and grouped by category.
- Fittings index Connectors, couplings, boxes and supports by name.
- How to read a schematic The conventions every drawing assumes you know.
- Bonding vs grounding
- AFCI vs GFCI
- Ampacity
- Power factor
- Wye and delta
- Derating
- Inrush current
- Seal-in contact
- Service factor
- Normally open vs closed
- Line vs load
- Travellers
- Switched hot
- Full-load amps
- Turns ratio
Formula sheets
Printable, pocket-sized, built from public mathematics.
On the job
The practical basics a course assumes you already know.
Trade math
The arithmetic the job actually uses, explained plainly.
Related
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