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420 Watt Hedge Trimmer.

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The owner of the 420 Watt hedge trimmer decided to redesign the 0.75mm2 two core flex by cutting through it. This caused a dead short. His house is supplied by a TN-C-S supply. It has a consumer unit in the house with a B16 M.C.B. dedicated to supply his garage. The house consumer unit is a split load type with 30mA R.C.D.s. The hedge trimmer had a 13 amp plug fuse fitted. It was supplied via an extension lead fused at 5 Amps.


In the garage, where the hedge trimmer was plugged in,  there is a two way garage unit with a B16 M.C.B. for the sockets and a 30 mA R.C.D.


When the hedge trimmer flex was cut through which protective device(s) tripped off or ruptured?


Z.




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    Kelly Marie:

    I'm going to say one or other or   Both 16 amp trips and the 5 amp plug fuse 




    Is that your final answer Kelly Marie?


    O.K.


    I will accept your CORRECT answer. Well done.


    Yes, both the house M.C.B. and the garage M.C.B. (both B16 types) tripped off, AND the 5 Amp fuse in the extension lead blew as well.


    No other devices tripped off, no R.C.D.s tripped off, and the 13 Amp fuse in the hedge trimmer plug did not blow.


    P.S. The hedge trimmer flex was renewed.


    Z.

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  • 0

    Kelly Marie:

    I'm going to say one or other or   Both 16 amp trips and the 5 amp plug fuse 




    Is that your final answer Kelly Marie?


    O.K.


    I will accept your CORRECT answer. Well done.


    Yes, both the house M.C.B. and the garage M.C.B. (both B16 types) tripped off, AND the 5 Amp fuse in the extension lead blew as well.


    No other devices tripped off, no R.C.D.s tripped off, and the 13 Amp fuse in the hedge trimmer plug did not blow.


    P.S. The hedge trimmer flex was renewed.


    Z.

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