HI
The thought of been lucky to have the TN-S (although not currently used) has crossed my mind a few times.
The OH Line I was told was installed in the early 1960s, the first time my parents cottage (and the other properties supplied from the same Transformer) had electricity installed.
The houses in the village just below (mentioned in a previous post) did not have electricity until the 1950s (when a row of 10 council houses were built) and the houses were supplied overhead with two cables (L&N) and employed a TT system, I think via the mains water pipe!!! (I am aware it was once permitted) although since the last 25+ years all cables supplying the village houses have been replace with ordinary concentric cable and PME'd.
So yes, I fully understand where you are coming from.
I have therefore often considered, for an Earth to be provided to my parents cottage (and the two other properties) initially at the time (early 1960s) of the OH Line being installed was, in the very remote country concerned, a
PRIVILEGE.
To put this another way, it is a shame for a solely separate Earth cable on the pole to be there, serving no purpose whatsoever, when possibly available for use (although it only serves a purpose for Earth Leakage faults, which are probably a very rare occurrence in practice, but I consider that being beside the point).
Kind Regards
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Also, if the OH Earth had been suitable for use all along, then that possibly means the necessity to fork out on the cost of the TD RCD in the CU currently installed was not justified!
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