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Before the 13 Amp "Square Pin" Plug.

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I don't know why the pins were called "square" as they were more rectangular in the 13 Amp plug.


Anyway, before the 13 Amp plug was adopted, there was a new plug about the size of a 2 Amp 3 pin plug with round pins. It was fused. The fuses available for it were 2, 5, 10 and 13 Amps. The plug was rated at 13 Amps. 230 Volts but could cope with up to 15 Amps. 


Who can name the manufacturer of this new fused round pin plug?



Z.
  • 0
    In the 1960's at the BBC Engineering Design labs, each lab had a auto tap-changer mains stabiliser.  The stabilised supply fed the development benches and these were equipped with D&S sockets and the test instruments had plug tops with screw in fuses.  The neutral had a round pin, earth was also round but with a slot that fitted into a keyway on the socket.  The general service non stabilised supply used standard BS1363 sockets.


    I cannot recall a particular problem with broken off fuses, but I do remember adaptor leads with D&S plug tops feeding 4-way BS1363 dis boards.  By the 1970's D&S plug tops were significantly more expensive than BS1363's and all the distribution was changed.


    David

    Edited to add plug detail
  • 0
    Was this the place in the Manor at Wood Norton?
  • 0
    Actually, I was at the Design centre near Broadcasting House in central London, but the Training school at Wood Norton near Evesham  and Research group at Kingswood Warren in Surrey (another old Country House) also had the same arrangement.


    David
  • 0
    Cool thanks David. I once saw the very big voltage stabiliser transformers at rampisham down transmitting Station  they seem to work very well clever bits if kit

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