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Power bank blowing fuses?

Lisa Miles
Hi all


I have a question I hope some of you might know the answer to.


We've recently moved over from a builders electricity supply to a domestic supply on our new build house in France. The electrics have all been checked out and signed off by the Consuel.


I have a two port USB powerbank manufactured by a well known battery manufacturer (?) and I was trying to charge it up while I was there using a native two pin USB charger plug. It basically fried the charger plug but didn't trip the fuse on the main board... 


I then plugged it in to a four socket extension lead (two pin plug to three pin sockets) using a three pin charger plug I have. It blew the extension lead but again didn't trip the fuse on the main board. 


At first I thought it must be a fault with the powerbank but  when I got back to the UK, I plugged it into my usual charger and it charged up as normal... ??


What do you think the problem could be? 

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  • 0
    Hang on, what exactly is failing here - where is the 'fuse' ? - I had assumed  these are sockets with a built in USB outlet, and it works in one but not the other, now. it sounds like not the case


    So actually  you have a mains to 5V power supply, plugging into a socket, charging a battery that is or is not still connected to a load that may also have connections to other things ?

    More description needed


    - if you are tripping 16A breakers then there is something much more weird going on. If  however its an RCD firing then I'd be looking to see if there is an earth connection to the USB negative, or if the mains to 5V conversion is supposed to be double insulated - both types exist.


    OR a neutral earth fault in the mains to 5V converter - French L-N polarity may be reversed..
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  • 0
    Hang on, what exactly is failing here - where is the 'fuse' ? - I had assumed  these are sockets with a built in USB outlet, and it works in one but not the other, now. it sounds like not the case


    So actually  you have a mains to 5V power supply, plugging into a socket, charging a battery that is or is not still connected to a load that may also have connections to other things ?

    More description needed


    - if you are tripping 16A breakers then there is something much more weird going on. If  however its an RCD firing then I'd be looking to see if there is an earth connection to the USB negative, or if the mains to 5V conversion is supposed to be double insulated - both types exist.


    OR a neutral earth fault in the mains to 5V converter - French L-N polarity may be reversed..
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