Warning: Risk of fire! Basically every consumer - even the smallest - should be protected. Even small consumers, with a current consumption of only a few milliamps, can be the reason for short circuits and cables catching fire after power is supplied to them. In case of bad cable management in the vicinity of flammable materials, even a thin cable (for example 2 x 0.5 mm²) can cause a huge fire hazard after a short circuit.