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Domestic Electric Circuits

a What curren...

Question

(a) What current is taken by a 3 kW electric geyser working on 240 V mains ?

(b) What size fuse should be used in the geyser circuit ?

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Solution

(a) P = 3kW = 3000W
V = 240V
P = V x I
I = P/V
= 3000/240 = 12.5 A.
(b) A 13A fuse should be used in the geyser circuit.

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