How to calculate the FUSE rating?

Answer Posted / k.prakashchandra

Fusing current for a round wire is approximately is equal to
k d^3/2 Amps.d=dia in mm, k=80 for copper, 12.8 for tin and
59 for Al.Fusing factor =minimum fusing current/current
rating of fuse.This value should be more than one and is
usually two.

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