Ducati Diavel Workshop Manual page 203

Protection and safety devices
Important
Switch the ignition key to OFF before replacing a fuse to avoid possible short circuits.
Warning
Never use a fuse with a rating other than the specified value. Failure to observe this rule may damage the electric system
or even cause fire.
Besides the fuses inside the box, the motorcycle is also provided with one 30 A fuse (3), located near the voltage
regulator (in the electrical components compartment) that protects the electronic rectifier (Sect. 6 - 2,
regulator).
Rectifier-