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PME vs TN-C-S

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 Former Community Member over 4 years ago

For declared PME systems, it's also worth bearing in mind, that connection of the PEN conductor on one feeder circuit, to the PEN conductor of another circuit (even if that's from a different transformer) is quite normal as it reinforces the earthing of that conductor.

This interconnection may well be used instead of bashing in more electrodes (particularly at the end of circuit positions)

Borrowed Neutral, anyone

Regards

OMS
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0 Former Community Member over 4 years ago

For declared PME systems, it's also worth bearing in mind, that connection of the PEN conductor on one feeder circuit, to the PEN conductor of another circuit (even if that's from a different transformer) is quite normal as it reinforces the earthing of that conductor.

This interconnection may well be used instead of bashing in more electrodes (particularly at the end of circuit positions)

Borrowed Neutral, anyone

Regards

OMS
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PME vs TN-C-S

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