Test the RCD annually
Many fuse boxes have earth fault circuit breakers that are supposed to protect you from electric shock and fire in the event of a fault. An earth fault circuit breaker switches off the fuse automatically if an earth fault occurs in a circuit.
In new systems, the residual current circuit breaker is part of the circuit breakers (toggle fuses). In older systems, RCDs can be retrofitted, often for courses for bathrooms and outdoor sockets. This must be described in the overview inside the fuse box.
Test the RCD at least once a year to prevent the button from jamming. Check the fuse box for instructions on how to do this.
Replace surge protector after a bang
New fuse boxes also have surge protection. This is to protect the electrical system from damage in the event of a thunderstorm. Please note that the surge protector must be replaced if it has been exposed to a bang. Check the instructions in the fuse box that show how you can check whether the surge protector is in order.
Look for warning signs
To avoid faults in the fuse box, you should look and feel for the warning signs at regular intervals. After a heavy thunderstorm, it may also be a good idea to have a check-up.
Heat is a sign that there is danger afoot. If the cabinet door to the fuse box is abnormally hot to the touch, you should contact an electrician who can investigate further. The same applies if there is a smell of burnt plastic or you hear clear crackling. If several light bulbs flicker at the same time or the fuses often blow, this is also something an electrician should check out.