FAQs for Electrical
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Electrical
What earth resistance is acceptable?
Typically ≤1 Ω for substations and ≤2–5 Ω for general equipment earthing; confirm with IS 3043 and the electrical inspector.
How much voltage drop is allowed?
Commonly 3% for power and up to 5% at the farthest load; check your specification.
Do I need CEIG approval?
Installations above the CEA-specified voltage/capacity need inspector approval before energising.
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Calculators: HT Panels & Transformer calculator · LT Panels / MCC / PCC calculator · Cable Sizing calculator · Earthing calculator · Lightning Protection calculator · Lighting calculator · DG Set calculator · Power Factor Correction (APFC) calculator
Catalogue categories: Cables, Switchgear & Panels, Transformers, Lighting, Earthing
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Standards cited by number for reference; verify designs with a qualified engineer.