Practice
Guided wiring puzzles. Work through them in order — each builds on the last.
Joints & junctions
Connecting cables safely inside boxes and connectors.
Through-joint: 3-terminal junction box
Wire both ends of a junction box through-joint and understand why live (line) connects to live, neutral to neutral, and earth (CPC) to earth.
Junction box wiring method (4-terminal)
Wire a 4-terminal junction box used in the junction box lighting method — an alternative to the ceiling rose loop-in, common in loft spaces.
Joining old colours to new at a junction box
Millions of UK homes still have pre-2006 red/black wiring. Learn to join it safely to modern brown/blue cable.
Lighting & switching
Ceiling roses, switch drops, and multi-way control.
Wiring a one-gang light switch
The most basic switch wiring: terminate the switch drop at a single one-way switch and learn what COM and L1 actually do.
Inside an old 2-plate ceiling rose
Wire a 2-plate ceiling rose — the older arrangement you'll still find in many UK homes, with loop-in, switch wire, and pendant connections.
Inside a modern 3-plate ceiling rose
Wire the modern loop-in ceiling rose. Four cables: loop-in mains, loop-out mains, switch wire, and pendant — all sharing the same terminal blocks inside the rose.
2-way switching: wiring the strapper cable
Understand 2-way switching — where two switches control one light. Wire the 3-core strapper cable between the two 2-way switches.
Sockets & ring finals
Ring circuits, spurs, and BS 7671 power rules.
Wiring a socket on a ring final circuit
The most common power-circuit job in UK homes: terminate the two ring cables at a socket and understand why two cables share each terminal.
Adding a spur to a ring final circuit
Take a single spur off an existing ring socket to feed one new socket — and learn the BS 7671 rules that trip people up.
These lessons are for learning, not for certifying work. In England and Wales, replacing an accessory like a ceiling rose is non-notifiable, but new circuits and consumer unit work fall under Part P and must be done or signed off by a competent person (Scotland has its own Building Standards). BS 7671 is the authoritative source — always.