In many kitchens I have seen a short-time timer attached to the outlet where the coffee maker/percolator/water boiler is connected. I.e. to make coffee, they both need to start the coffee maker, and start the timer (which will be on for example 30min).
I understand the reason for this, which is to prevent fire which can be caused by letting for example the hotplate in the coffee maker run hot without anything on it, or the water boiler be on without any water in it.
However in most modern coffee makers/water boilers/percolators there is a built in timer. For example in my percolator, there is a built in timer and the percolator will automatically turn off after 15min. So is there still a good reason to use an external short-time timer (even if there is a built in one) or can this be considered to be over cautious?
I live in Sweden so the appliances I buy follow the EU regulations.