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RCD in consumer unit difficult to switch on

Alan B

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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    Maybe need better description of the RCD in question or photo or make model/type? I have had RCD units protecting either full or split consumer units and the ones with a lever action i.e rotary action can and are quite stiff to reset compared to those with just an up/down action, there are of course just one or two odd ones out there that require the lever to be “Reset” by pushing fully to the off position where it resets then it will move back to the on position. Cant tell the issue from the initial description.

     

    GTB

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  • 0

    Maybe need better description of the RCD in question or photo or make model/type? I have had RCD units protecting either full or split consumer units and the ones with a lever action i.e rotary action can and are quite stiff to reset compared to those with just an up/down action, there are of course just one or two odd ones out there that require the lever to be “Reset” by pushing fully to the off position where it resets then it will move back to the on position. Cant tell the issue from the initial description.

     

    GTB

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