"NY" wrote in message
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"The Natural Philosopher" wrote in message
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How much of the route from the power station to the consumer is
redundant multi-circuit? At one point, typically, does it change over to
a given house only being fed by one set of wires, and if that line
develops a fault there is no backup circuit?

Typically 11KV is run as a ring - it is here anyway, so the only single
point of failure is the 240V stuff from the local substation.

Out here in a North Yorkshire village there seem to be 11 kV spurs, each
with a pole-mounted transformer to step down to 240V.

Ours that were done in the very early 70s are done like that.

Where I'm sitting I can see the end of the 11 kV line and its transformer.
Its 240V cables go underground to houses on one side of the road

The later subdivisions, what you lot call estates here have the 11KV
underground too, and the transformers stand on the ground, in big
metal cabinets about the size of a decent sized car, not quite as tall
as a van.

(probably built in 1950s) and then come above ground to 3-phase 240V
overhead wires to the houses on the other side of the road (1930s).