Fuses

How to Select Proper Rating Size of Fuse?
While selecting the proper fuse and its rated size for electrical appliances is based on different factors and environments. But the following basic formula shows how to choose the right size of fuse?

Fuse Rating = ( Power / Voltage ) x 1.25

For example, you have to find the right size of fuse for 10A two pin socket.

(1000W / 230V ) x 1.25 = 5.4A

In the above example, 1kW is the power rating which can be controlled through the 2 pin socket and the main supply voltage is single phase 230V AC (120V AC in US).

But you should go for the max i.e. 6A fuse rating instead of 5.4A for safe and reliable operation of the circuit.

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