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Zone 1.

Zoomup

After an N.I.C.E.I.C E.I.C.R. report I attended to see about some remedial work.

The house is TN-S supplied with a Ze of 0.64 Ohms. The main earthing conductor just pulled out when I tugged on it in the presence of the homeowner. Not good.

Anyway, in the bathroom is a cast iron bath tub. Immediately above it is a chrome finish spot light bar, reported to be suitable for zone 1 use. I do not know if it is a Class 1 or 2 fitting at this stage, but the owner will give me details later on.

A person standing in the bath tub can easily touch the metal luminaire as it is very low, mounted on a wooden beam.

Would you bond it to the bath tub pipework?

 

Z.

 

 

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  • 0

    mapj1: 
     

    It seems that not all rural supplies follow the rules.

    Well indeed. Sounds like TNS in some form (pure or PNB) 1 ohm is probably a lower electrode resistance than the pole pig alone

    How old is the 3 phase cable - old enough to be PILC ? maybe TNS

    If its consac treat as PME.

    Mike

    The incoming cable is not P.I.L.C. it is plastic covered. The 3 phase head is grey in colour L1, L2 L3 and N only.

    This property is located in the Norfolk Broads, and the water table is perhaps two for three feet below the ground surface.

    An aged post by BOD ref. CONSAC..

    Probably due to the problems with the outer sheath being damaged (when was the last time you saw it installed with 150 mm of sand around it?) by the typical backfill and the Al sheath forming what looked look a mass of aluminium "rust" (ask any LandRover owner

    face-icon-small-happy.gif

    ) that eventually causes loss of Neutral/Earth.

     

     

    Z.

Reply
  • 0

    mapj1: 
     

    It seems that not all rural supplies follow the rules.

    Well indeed. Sounds like TNS in some form (pure or PNB) 1 ohm is probably a lower electrode resistance than the pole pig alone

    How old is the 3 phase cable - old enough to be PILC ? maybe TNS

    If its consac treat as PME.

    Mike

    The incoming cable is not P.I.L.C. it is plastic covered. The 3 phase head is grey in colour L1, L2 L3 and N only.

    This property is located in the Norfolk Broads, and the water table is perhaps two for three feet below the ground surface.

    An aged post by BOD ref. CONSAC..

    Probably due to the problems with the outer sheath being damaged (when was the last time you saw it installed with 150 mm of sand around it?) by the typical backfill and the Al sheath forming what looked look a mass of aluminium "rust" (ask any LandRover owner

    face-icon-small-happy.gif

    ) that eventually causes loss of Neutral/Earth.

     

     

    Z.

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