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PME vs TN-C-S

AncientMariner
Are PME and TN-C-S supplies exactly the same?  Or does PME also have requirements regarding the number and relative location of suppliers earthing rods?

I am thinking here where the DNO replaces a length of failed 4-core (3-phase + Neutral) PILC cable with Wavecon or similar cable which has a combined Neutral and Earth conductor.  The average consumer would not know that their electricity supply's method of earthing had been changed.

Clive.
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  • 0
    I’ll go for:

    2 or more DNO earths = PME protective multiple earthing.

    1 DNO earth = PNB protective neutral bonding.

    Both are TN-C-S combined in the DNO network and separate in the consumers installations. 

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  • 0
    I’ll go for:

    2 or more DNO earths = PME protective multiple earthing.

    1 DNO earth = PNB protective neutral bonding.

    Both are TN-C-S combined in the DNO network and separate in the consumers installations. 

Children
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