Practice Exercises
Work through guided UK domestic wiring exercises. Each exercise checks your wiring against real BS 7671 rules.
One-Way Lighting Circuit
Single switch controlling one lamp
Wire a basic one-way lighting circuit: a supply feeds through an MCB, then through a single-pole switch, to a lamp. The switch must be in the live conductor. This is the most fundamental domestic lighting circuit.
Two-Way Lighting Circuit
Two switches controlling one lamp (staircase wiring)
Wire a two-way lighting circuit where two switches at different locations (e.g. top and bottom of stairs) both control a single lamp. Uses two 2-way switches with L1 and L2 "strapping" wires between them.
Radial Socket Circuit
20A radial circuit feeding socket outlets
Wire a 20A radial socket circuit. The circuit feeds from the consumer unit (via an MCB) to socket outlets in a single radial run. Each socket must have live, neutral, and earth connections. No ring is formed.
Ring Final Circuit
32A ring circuit — both ends return to the consumer unit
Wire a ring final circuit: the live, neutral, and earth conductors start at the consumer unit, feed through socket outlets in a ring, and return to the same circuit breaker. This is the most common socket circuit in UK domestic installations.