18-09-2022, 04:40 PM
A master fuse will indeed protect the wiring. However, if you are using a 3 brush dynamo, a blown fuse can create unforeseen problems. If the engine is running when the fuse blows, and the dynamo is generating, the engine will continue to run. Without the battery to regulate the dynamo output the voltage will rise significantly causing possible damage to any voltage sensitive items such as filament bulbs, cutout coils etc.