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TN-S - Additional PE Conductor

Nick Parker

Why in TN-S System PE Cables have to be provided in addition to the phase conductors for each loads (like socket, light fixture, Motor etc.)?
Don't bonding the enclosure of the loads (socket, fixtures, Motors etc.) to the local earth electrode or grid makes it sufficient and the fault current takes the route of enclosure --> earth electrode / grid --> return via mother earth to the source?

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    Your question isn't very clear. Let's consider a normal TN-S set-up, then tell us exactly if and how the plant diverges from this, or whether you find a standard TN-S set-up strange.

    TN-S: at the transformer, N and the PC are bonded together and are also earthed. N and PC run from the transformer as separate connections to every electrical device in the building.

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  • 0

    Your question isn't very clear. Let's consider a normal TN-S set-up, then tell us exactly if and how the plant diverges from this, or whether you find a standard TN-S set-up strange.

    TN-S: at the transformer, N and the PC are bonded together and are also earthed. N and PC run from the transformer as separate connections to every electrical device in the building.

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