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Unusual cable?

AncientMariner
Some people collect stamps, I collect cable. Preferably as short encapsulated paperweights, although I do have others, such as a piece of TAT1 and a piece of the original transatlantic telegraph cable of 1866.


One of my paperweights is a 6-core lead covered cable, each core 0.125 sq. inches copper rated at 11,000 volts WP (which I guess is Working Pressure which translates to Working Voltage) It was produced for the City of Sheffield by the Western Electric Company London. No date given.


Why use a 6-core cable? Seems to be putting all ones eggs in one basket if used for a two circuit system. Had it been for a lower voltage, then perhaps an ac feed to a mercury arc rectifier, but surely not at 11 kV?

Clive
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    I suppose that it might have been for a large electric motor with star/delta starting, perhaps in an area with a flammable atmosphere, and the starter located remotely in say a substation.

    That would be very large motor indeed, but just about possible. Back in the day, direct steam engine drive was often preferred for that much horsepower. Either a reciprocating steam engine or a steam turbine.
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    I suppose that it might have been for a large electric motor with star/delta starting, perhaps in an area with a flammable atmosphere, and the starter located remotely in say a substation.

    That would be very large motor indeed, but just about possible. Back in the day, direct steam engine drive was often preferred for that much horsepower. Either a reciprocating steam engine or a steam turbine.
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