The primary purpose of equipment earthing as per IS 3043 is to __________.
Answer & step-by-step solution
Equipment earthing provides a low-impedance path for leakage/fault current from exposed conductive parts to earth/protective conductor so protective devices can operate rapidly and dangerous touch voltage is reduced.
Concept & Reasoning
If insulation fails and a live conductor contacts a metal enclosure, an unearthed enclosure can remain at dangerous voltage. A proper protective earth creates a fault loop with sufficient current to operate a fuse/MCB/RCD as applicable, while bonding keeps accessible conductive parts close to earth potential.
How to Solve It in the Exam
Earthing is about safety and fault-current return path.
Important Exam Point
Protective earthing does not intentionally carry normal load current.
Quick Trick
Earthing is about safety and fault-current return path.
Common Mistake
Thinking equipment earthing is primarily for power-factor or frequency control.
IS 3043 के अनुसार उपकरण अर्थिंग का प्राथमिक उद्देश्य __________ है।
उत्तर और चरणबद्ध हल
उपकरण अर्थिंग खुले चालक भागों से अर्थ/प्रोटेक्टिव चालक तक लीकेज/फॉल्ट धारा के लिए कम-प्रतिबाधा पथ देती है, ताकि सुरक्षा उपकरण तेज़ी से काम करें और खतरनाक टच वोल्टेज घटे।
विस्तृत हल (मूल भाषा में)
Concept & Reasoning
If insulation fails and a live conductor contacts a metal enclosure, an unearthed enclosure can remain at dangerous voltage. A proper protective earth creates a fault loop with sufficient current to operate a fuse/MCB/RCD as applicable, while bonding keeps accessible conductive parts close to earth potential.
How to Solve It in the Exam
Earthing is about safety and fault-current return path.
Important Exam Point
Protective earthing does not intentionally carry normal load current.
Quick Trick
Earthing is about safety and fault-current return path.
Common Mistake
Thinking equipment earthing is primarily for power-factor or frequency control.
IS 3043 મુજબ ઉપકરણ અર્થિંગનો પ્રાથમિક હેતુ __________ છે.
જવાબ અને પગલાવાર ઉકેલ
ઉપકરણ અર્થિંગ ખુલ્લા વાહક ભાગોથી અર્થ/પ્રોટેક્ટિવ વાહક સુધી લીકેજ/ફોલ્ટ પ્રવાહ માટે ઓછા અવબાધનો માર્ગ આપે છે, જેથી રક્ષણ ઉપકરણો ઝડપથી કાર્ય કરે અને જોખમી ટચ વોલ્ટેજ ઘટે.
વિગતવાર ઉકેલ (મૂળ ભાષામાં)
Concept & Reasoning
If insulation fails and a live conductor contacts a metal enclosure, an unearthed enclosure can remain at dangerous voltage. A proper protective earth creates a fault loop with sufficient current to operate a fuse/MCB/RCD as applicable, while bonding keeps accessible conductive parts close to earth potential.
How to Solve It in the Exam
Earthing is about safety and fault-current return path.
Important Exam Point
Protective earthing does not intentionally carry normal load current.
Quick Trick
Earthing is about safety and fault-current return path.
Common Mistake
Thinking equipment earthing is primarily for power-factor or frequency control.
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