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

As per IS 732, the colour code for the earth wire in a flexible cable is __________.

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Answer & Explanation

Correct AnswerC. Green

Quick Explanation

The protective earth conductor is identified by green in the convention used by this paper/IS 732 question. The distinctive earth-conductor colour prevents accidental connection as a live or neutral conductor.

Formula / Key Relation

Earth/protective conductor → green (exam convention)

Detailed Explanation

Concept & Reasoning

Protective conductor identification is a safety-critical wiring convention. Modern installations may use green-and-yellow identification under harmonized standards, but the option set asks the conventional colour used in the referenced code/exam context, for which green is the intended answer.

How to Solve It in the Exam

Earth = green; never red/black/blue.

Important Exam Point

For real installations follow the current applicable standard and local code edition.

Related Revision Path

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

Protective Earth Conductor Colour explanatory diagram

Quick Trick

Earth = green; never red/black/blue.

Common Mistake

Using phase/neutral colours for the protective conductor.

Exam Tip

For real installations follow the current applicable standard and local code edition.

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Exam Path

Knowledge Path

Study concept · Protective Earth Conductor Colour →Practice concept Practice topic

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