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RCD in consumer unit difficult to switch on

Just as I arrived at a customers house there was a power cut because the DNO was working on a substation near by. It wasn't expected back on until midnight tonight meaning that I could only do dead tests.

When the power cut the main RCD in his CU also tripped and it was quite difficult to get it back to the on position. I am aware you can get latching RCD's in plug sockets but not normally in domestic CU's.

This leaves me wondering if the lack of power on the supply side or maybe some disturbance on the lines was making the RCD difficult to set or if I had a faulty RCD and need to start hunting down an RCD for my return trip.

There was a single RCD protecting all circuits and switching all the circuits off made no difference. I am assuming it doesn't change the operation of an RCD  but the CU was mounted upside down.

Welcome your thoughts

Thanks

 

Alan

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  • Alan B: 
     

    Thanks for your thoughts.

    I was on site to resolve a flickering light which I think was due to poor connections in the lamp holder. Still waiting to find out if the problem was resolved when power came back on.

    The rcd is a leaver type it fel

    Just to clarify again the installation was not powered as dno was working on the substation, therefore problem unlikely to due to fault in the installation.

    The rcd was a GET 80R30.

     

    I would renew the R.C.D. and see what happens. G.E.T. was a seller of “economy” electrical products, the full company name = Great Eastern Trading.

    Z.

Reply
  • Alan B: 
     

    Thanks for your thoughts.

    I was on site to resolve a flickering light which I think was due to poor connections in the lamp holder. Still waiting to find out if the problem was resolved when power came back on.

    The rcd is a leaver type it fel

    Just to clarify again the installation was not powered as dno was working on the substation, therefore problem unlikely to due to fault in the installation.

    The rcd was a GET 80R30.

     

    I would renew the R.C.D. and see what happens. G.E.T. was a seller of “economy” electrical products, the full company name = Great Eastern Trading.

    Z.

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