ModerateAssistant Engineer (Electrical), Class-2, Road and Building Department2025✓ Editorially verified

As per IS 732, a leakage current in an installation should not exceed __________ of the full load current.

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Answer & Explanation

Correct AnswerC. 1/5000th

Quick Explanation

Under the IS 732 rule referenced by the paper, installation leakage current should not exceed 1/5000 of the full-load current. Limiting leakage is important for shock protection, insulation health and avoiding unwanted protective-device operation.

Formula / Key Relation

I_leak,max = I_full-load / 5000

Detailed Explanation

Concept & Reasoning

Leakage current is current flowing through insulation/protective paths under normal conditions. The acceptable limit is small compared with load current. For this historical code-based MCQ, use the specified fractional limit exactly as tested.

How to Solve It in the Exam

Leakage limit is a very small fraction: 1/5000 in this question.

Important Exam Point

Standards can be edition-specific; preserve the exam's referenced code context.

Related Revision Path

This question sits in the revision path Electrical Laws, Standards and Energy Policy → Indian Standards → Electrical Installations .

Permissible Leakage Current explanatory diagram

Quick Trick

Leakage limit is a very small fraction: 1/5000 in this question.

Common Mistake

Choosing 1/100 simply because it is easier to remember; that would be far too large.

Exam Tip

Standards can be edition-specific; preserve the exam's referenced code context.

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Exam Path

Knowledge Path

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