University of Free Knowledge

The Guild · skilled trades & applied crafts

Electrical & Plumbing

The two trades hidden in the walls — safe circuits and sound pipes, taught to code.

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TK 3285 Residential Wiring I

Circuits from panel to receptacle — conductors, boxes, and connections made safe by method.

Syllabus · 4 units · ~40 hours

Unit I — Electricity for the Trade
Voltage, current, and resistance in practice · Ohm's law at the panel · AC power in the home: 120 and 240 volts · Grounding and bonding, and why they differ

Unit II — Materials and Safety
De-energizing and verifying before work · Cable types: NM, UF, and conduit basics · Boxes, fill calculations, and connectors · Wire gauge and ampacity

Unit III — Circuits in Practice
Wiring a receptacle circuit · Switch legs: single-pole and three-way · GFCI and AFCI protection · Reading a panel schedule

Unit IV — Rough-In to Trim-Out
Laying out a room's circuits · Pulling cable and securing it to code · Making up boxes · Testing before the walls close

UndergradcoreNot yet inked—opens Fall 2026.
TK 260 Navigating the Electrical Code

How the NEC is organized and how working electricians find answers in it fast.

Syllabus · 3 units · ~14 hours

Unit I — The Shape of the Code
Chapters, articles, and sections · Definitions in Article 100 · How amendments and local codes layer on

Unit II — Finding Answers
The index method versus the table method · Common lookups: ampacity, box fill, conduit fill · Working a code question end to end

Unit III — The Code in the Field
What inspectors check first · Documenting compliance · When to ask the authority having jurisdiction

UndergradcoreNot yet inked—opens Fall 2026.
TH 6122 Plumbing Fundamentals: Supply & Drainage

Two systems in every wall — pressurized supply in, gravity drainage out, and the traps between.

Syllabus · 4 units · ~36 hours

Unit I — Water In
The service line and the meter · Pipe materials: copper, PEX, CPVC · Sizing supply lines · Valves and where to put them

Unit II — Water Out
Gravity, slope, and the quarter inch per foot · Drain, waste, and vent: three jobs, one system · Traps and the seal that keeps sewer gas out · Venting principles and common layouts

Unit III — Joining Pipe
Soldering copper · Crimping and expanding PEX · Solvent-welding PVC · Threaded connections and pipe dope

Unit IV — Fixtures
Setting a toilet · Installing a lavatory and faucet · Water heaters: tank basics and safety devices

UndergradcoreNot yet inked—opens Fall 2026.
TH 6123 Service & Repair: Leaks, Clogs & Calls

The service call, in order — find the leak, stop the water, make the fix that lasts.

Syllabus · 2 units · ~12 hours

Unit I — Stopping the Water
Shutoffs: fixture, branch, and main · Reading a water meter for hidden leaks · Emergency triage for burst pipes

Unit II — Common Repairs
Rebuilding a running toilet · Faucet cartridges and washers · Clearing traps and short runs with an auger · When a clog means a bigger problem

EnthusiastintroNot yet inked—opens Fall 2026.
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