and is this a serious mistake? what if you put in a higher amperage fuse in a fuse slot that requires a lower amperage? say a 30-amp fuse in a 20-amp slot? let's say it's for the radio. is the 10-amp difference considered significant enough to damage the radio or any other components not related to the blown fuse (can it affect say the headlights)? or does it take a very big differencem say 15 to 20-amp?