How do you wire an immersion timer switch?

To wire an immersion timer switch, first, ensure the power supply is turned off at the circuit breaker. Connect the live wire (usually brown) from the power supply to the input terminal of the timer switch, then connect the output terminal of the timer to the live wire leading to the immersion heater. Connect the neutral wire (usually blue) directly to the immersion heater. Finally, secure all connections and restore power to test the timer functionality. Always follow local electrical codes and consider hiring a qualified electrician if unsure.