Project - Analysis of a practical automotive wiring circuit

3Sol:-Given data,

current A = 10 A

voltage V = 12V (battery voltage)

so P = I*V

= 10*12

P = 120 Watts.

fuse rating = (P/V)*1.25( Safety factor)

= 120/12*1.25

fuse rating = 12.5 A

4Sol:-given data,

P = 500 Watts

battery capacity Ah =?

we have , Ah = Total Load/Battery Voltage

= 500/12

= 4.16 Ah