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Generator Earthing (Neutral Earthing loop between other nearby Generators).

Jackson Jose

In one of our recent project. There are multiple generators and individually feeding to each MDBs. Consultant instructed to loop all the Generator Neutral between each generators. Our proposal to provide individual neutral earthing for each generators. 

Is it advisable to loop Generator Neutral Earthing (These generators are not synchronizing)

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  • 0

    BS 7430: Code of Practice for Earthing
    BS 7671: Requirements for Electrical Installations

    That's good. BS 7430 has (or at least used to have) some nice diagrams for generator earthing for various permutations.

    BS EN 50310 (Application of equipotential bonding and earthing in buildings with information technology equipment) might also be an interesting read for your situation.

       - Andy.

  • 0 in reply to AJJewsbury

    Does this standard also tacle points like:  Earthing downstream of a UPS,  Connection of 'Clean' earth and Main earth, Connection to lightning protection downdrops?

  • 0 in reply to Anton
    Anton said:
    Does this standard also tacle points like:  Earthing downstream of a UPS,  Connection of 'Clean' earth and Main earth, Connection to lightning protection downdrops?

    'Clean earth' is not used in IEC standards, CENELEC Standards or British Standards.

    But yes BS EN 50310 (IEC 30129) does cover functional earthing, combined protective and functional earthing, and combined protective and functional earthing,  and BS EN 62305 covers the lightning and surge protection aspects. Both to be used in conjunction with BS 7671 (IEC 60364-4-44) and BS IEC 61000-5-2.

    Earthing of circuits downstream of UPS should comply with BS 7671 (IEC 60364 series).

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  • 0 in reply to Anton
    Anton said:
    Does this standard also tacle points like:  Earthing downstream of a UPS,  Connection of 'Clean' earth and Main earth, Connection to lightning protection downdrops?

    'Clean earth' is not used in IEC standards, CENELEC Standards or British Standards.

    But yes BS EN 50310 (IEC 30129) does cover functional earthing, combined protective and functional earthing, and combined protective and functional earthing,  and BS EN 62305 covers the lightning and surge protection aspects. Both to be used in conjunction with BS 7671 (IEC 60364-4-44) and BS IEC 61000-5-2.

    Earthing of circuits downstream of UPS should comply with BS 7671 (IEC 60364 series).

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