Not less than 1 m

Not less than 1.5 m

Not less than 2.0 m

Not less than 2.5 m

Not less than 2.0 mm

Not less than 2.5 mm

Not less than 3.15 mm

Not less than 6.5 mm

By increasing the dia of pipe

Connecting number of earth electrode in parallel

By increasing the depth of earth pit

By connecting insulated cables

Commercial buildings

Industries

Generating station

Domestic buildings

Commercial building

Substations

Industries

Multistoried buildings