Why should a 5-ampere fuse never be replaced with a 20-ampere fuse?
The larger fuse would be likely to blow because it is rated for higher current
The power supply ripple would greatly increase
Excessive current could cause a fire✓Bonne réponse
Voltage drop in the higher current fuse could result in excessively low voltage to the device
Explication
The fuse rating is chosen to protect the wiring and equipment, so a circuit built for 5 amperes will be allowed to draw four times that current before a 20-ampere fuse opens. The wiring and components can overheat and start a fire long before the larger fuse blows.