Question

13) What should be the rating of fuse wire when an electrical heater of 2 kW is connect
200 V supply?
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Answer 1

Answer:

P-2Kw-2000w

V-200v

I-p/v

I-2000/200

I-10A

So, a fuse of 10A should be used

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Answer 2

Thus a fuse of 5 A should be used.

Explanation:

Power "P"  = 2 Kw = 2000 Watt

Voltage "V" = 200 V

We know that:

Current = Power / Voltage

I  = P / V

I = 2000 / 200

I = 10 A

If fuse rating is kept as 15 amperes,more than 10 ampere current will flow through the wire thus damaging the wire.So,the rating should be kept as 5 Ampere.

Thus a fuse of 5 A should be used.