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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.




Parents
  • 0
    The mains electric one that I replaced the flex on was very safe. You need to hold the trimmer in two places at once for the blades to operate, that presses in two separate switches.  Just like the old light bulb testing stations in F.W. Woolworth years ago. That way the sales assistant could not get electrocuted accidentally if she had her fingers in the lamp holder and switched it on with the other hand.


    Z.
Reply
  • 0
    The mains electric one that I replaced the flex on was very safe. You need to hold the trimmer in two places at once for the blades to operate, that presses in two separate switches.  Just like the old light bulb testing stations in F.W. Woolworth years ago. That way the sales assistant could not get electrocuted accidentally if she had her fingers in the lamp holder and switched it on with the other hand.


    Z.
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