Question

how does the fuse rating differ from the rating of electrical device​

Answer 1

see... More the Power of the device more the fuse rating..

P=VI

so if the current required by the device is more, the heat will be more (H= I²Rt)

so since current will be more, the fuse rating will be higher.

same holds true when current drawn is less!

Answer 2

Explanation:

so if the current required by the device is more, the heat will be more