Hi everyone, I want to fit a timer to an immersion heater. Just a mechanical one would do although it could be digital if necessary. All the timers that I can see are rated 16A. However, this heater is on a circuit with a 20A MCB. Does this mean I shouldn't fit the timer? Or if I do, I have to get a smaller breaker? But would that mean that it starts to trip annoyingly? Not sure of the right solution, advice appreciated. Thanks!