Electrical Installation and Maintenance (NC II-aligned)

Practitioner · about 14 hours · 29 lessons and builds · for electrical trainees and nc ii reviewers, apprentices, maintenance staff, homeowners who want to understand their wiring

Work safely on single-phase building wiring; read plans and a schedule of loads; size breakers, wires and conduit; make sound splices and terminations; rough in, install protective devices, grounding and wiring devices; test and turn the job over. Aligned with the NC II competency standard for electrical installation and maintenance.

Safety, tools, plans, calculations, splices, conduit and cable, panels and breakers, grounding, outlets and switches, testing: lessons, wiring builds on the bench and a practice test for every module.

Before you start: None: it starts with safety and Ohm’s law

Start the course in the labFree. Sign in only if you want your progress on every device.

Module 1: 1 · Electrical safety and PPE

• Electrical safety, PPE and lockout/tagout
• RCD protection: someone touches a live wire

Then a written practice test in the lab: questions drawn at random, pass at 80 %, every answer explained.

Module 2: 2 · Hand tools and testers

• Hand tools, testers and their care
• Using a multimeter

Then a written practice test in the lab: questions drawn at random, pass at 80 %, every answer explained.

Extra practice:

• Continuity and short-finding

Module 3: 3 · Reading electrical plans

• Reading electrical plans

Then a written practice test in the lab: questions drawn at random, pass at 80 %, every answer explained.

Module 4: 4 · Calculations: load, breaker, wire and voltage drop

• Mensuration and electrical calculations
• Power and power ratings
• Aircon branch circuit: 1.5 HP on 3.5 mm² and a 20 A breaker, on its own

Then a written practice test in the lab: questions drawn at random, pass at 80 %, every answer explained.

Extra practice:

• Ohm’s law
• Fuses and fault current
• Water heater circuit: 3.5 kW on 5.5 mm² and a 30 A breaker

Module 5: 5 · Terminating and connecting

• Splices, terminations and connectors

Then a written practice test in the lab: questions drawn at random, pass at 80 %, every answer explained.

Extra practice:

• Continuity and short-finding

Module 6: 6 · Roughing-in: conduit, raceways and cables

• Conduit, raceways and boxes: roughing-in
• Wires and cables: types, sizes and pulling
• Light with one switch
• Outlet circuit: three outlets on a 20 A breaker

Then a written practice test in the lab: questions drawn at random, pass at 80 %, every answer explained.

Extra practice:

• Fan and light on a 2-gang switch

Module 7: 7 · Protective devices, grounding and lightning protection

• Panelboards and protective devices
• Grounding, bonding and lightning protection
• House panel: main breaker and four branch circuits

Then a written practice test in the lab: questions drawn at random, pass at 80 %, every answer explained.

Extra practice:

• Grounding, bonding and surge protection: the two jobs of earth

Module 8: 8 · Wiring devices and lighting fixtures

• Wiring devices and lighting fixtures
• Staircase light: two 3-way switches

Then a written practice test in the lab: questions drawn at random, pass at 80 %, every answer explained.

Extra practice:

• Fan and light on a 2-gang switch

Module 9: 9 · Testing, turnover and the final assessment

• Testing and turnover

Then a written practice test and the final practice assessment in the lab: questions drawn at random, pass at 80 %, every answer explained.

Extra practice:

• Continuity and short-finding
• Water heater circuit: 3.5 kW on 5.5 mm² and a 30 A breaker