Electrical Engineering · Earthing Standards
According to BS 7671, which of the following statements correctly differentiates between 'functional earthing' and 'protective earthing'?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Functional earthing prevents electric shock, while protective earthing reduces power quality harmonics
- 2Both types are used exclusively in industrial plants with high-voltage equipment
- 3Protective earthing is for normal operation, while functional earthing is solely for fault protection
- 4Functional earthing is for system operation (such as EMC), while protective earthing ensures safety under fault conditions✓
Correct answer
Functional earthing is for system operation (such as EMC), while protective earthing ensures safety under fault conditions
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