A fuse is a very thin piece of wire that acts as a safety device in a mains plug.
If a fault occurs and the current becomes too high, the fuse wire will melt and break the circuit causing further damage or fire.
The fuse rating is the maximum current the fuse can carry without melting. Fuses are available at 1 A, 3 A, 5 A and 13 A.
To find the correct fuse to use, calculate the normal operating current for an appliance. For example a toaster has a power of 1100 W and is connected to a 230 V mains supply.
Power = current X potential difference
Current = power/potential difference = 1100/230 = 4.8 A
The fuse rating must be higher than 4.8 A, so choose a 5 A fuse.
Comments
No comments have yet been made