1.
What will be the value of leakage current through wire in a residential building with supply voltage of 240 volts, if a building wiring consists of 10 points of 100-watt lamps and 7 fans of 200 watts each?
A
1.5 A
B
2 A
C
10 mA
D
2 mA
View Answer
Correct Answer: D — 2 mA
Explanation:
The correct answer is D: 2 mA.
Total load: P = (10 × 100) + (7 × 200) = 2400 W
Full load current: I = P / V = 2400 / 240 = 10 A
As per IE Rules, maximum permissible leakage current = I / 5000 = 10 / 5000 = 2 mA