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Supply Systems

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Supply Systems

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    1. Supply Systems

    2. Acronym T – Terre (French for soil or earth) N – Neutral C – Combined S - Seperated

    3. TN-S Terre Neutral – Separate The supply authority provide a separate neutral and earthing conductor from the supply transformer

    4. TN-S

    5. TN-S

    6. TN-C-S (PME) Terre Neutral – Combined – Separate Protective Multiple Earth The neutral and earth conductor are supplied as a single conductor until the main cutout in the consumers property. Uses a PEN conductor (Protective Earthed Neutral) Common in urban areas

    7. TN-C-S (PME)

    8. TN-C-S (PME)

    9. TT Common in rural areas Due to high impedances to earth, an RCD is employed as additional protection

    10. TT Terre Terre Supply authority supply only a live and a neutral conductor, the consumer has the responsibility for providing their own earth connection Often achieved with the use of earth electrode rods

    11. TT

    12. TT

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