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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
    Yes, indeed!


    A couple of years back on the day before Christmas Eve I think it was, the 5-core PILC cable (it had a lighting core in as well) failed. We live between the sub-station and the failure and we were back on power fairly quickly, whereas our next door neighbour was off a bit longer as they joined the other side of the failure to the new cable Wavecon(?) first. (The failure appeared to be due to the PILC being slightly damaged (at the time) when a water meter was fitted for next door.)


    Being my usual nosey self I inquired about the street light and was told that they only use one type of cable for repairs and the street light was left isolated for about twelve months until a supply was found for it on the other side of the road.

    I didn't see any earth rods being driven in near the joints. Similarly when local link boxes were being renewed, they joined on tails where the earth and neutral were combined. Here though, earth rods laid horizontally in the trench were used.

    Clive
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  • 0
    Yes, indeed!


    A couple of years back on the day before Christmas Eve I think it was, the 5-core PILC cable (it had a lighting core in as well) failed. We live between the sub-station and the failure and we were back on power fairly quickly, whereas our next door neighbour was off a bit longer as they joined the other side of the failure to the new cable Wavecon(?) first. (The failure appeared to be due to the PILC being slightly damaged (at the time) when a water meter was fitted for next door.)


    Being my usual nosey self I inquired about the street light and was told that they only use one type of cable for repairs and the street light was left isolated for about twelve months until a supply was found for it on the other side of the road.

    I didn't see any earth rods being driven in near the joints. Similarly when local link boxes were being renewed, they joined on tails where the earth and neutral were combined. Here though, earth rods laid horizontally in the trench were used.

    Clive
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