Question

What is the current rating of a fuse for an appliance with a power rating of $2.2kW$ at $220V$?

• A. $10A$
• B. $5A$
• C. $2A$
• D. $20A$

Answer 1

The correct option is A $10A$

Power rating of the appliance = $2.2kW$
Voltage rating = $220V$
Current rating of a fuse is given by
Current rating = $\frac{\text{power rating of the appliance}}{\text{voltage rating}}$

Current rating = $\frac{2.2\times 1000}{220}$

Current rating = $\frac{2200}{220}$


Current rating = $10A$