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RCD Not working with the test button

Hello all!

I have a circuit, 16a 3ph&e feeding a 16a socket and it has a stand-alone RCD after the isolator, before the socket - fairly normal I think.

The test button doesn't work on the RCD, its a 4 pole unit, nothing connected to the neutral, but looking at the little circuit diagram, it looks like the test button is connected between N and E

It does trip with a fault, but is this, a) normal, b) compliant?

Im not an electrician, just an enthusiastic amateur FM

Parents
  • It is a pretty poor show if the installer does not know how to do this though. The resistor is scarcely expensive though two 3watt 4k7s in parallel or 2 off 1k resistors in series may be easier to find in this time of random electronics component shortages.

    Even so an example of something suitable here ; postage and £5 minimum order qty or whatever it is these days are probably the main costs.

    Mike

  • It is a pretty poor show if the installer does not know how to do this though.

    Wonder how it passed initial verification, as it's been a requirement of BS 7671 for some time to check the test button is working as part of initial verification?

  • I imagine he or she forgot and managed to tick the paperwork later from the comfort of the bar of the Dog and Duck, or some similar location.

    The gap between the  "regs world" and what happens 'in the field' can be huge.


    My ageing parents had their kitchen re-done a few years ago now,  and due to work, I was not about to go and supervise/ be a pain to the contractors.
    I did manage to mention to my dad to ask for the test results and certs from the sparks, as the moving of a few sockets suddenly developed a need for a new CU to replace the one I had been merrily adding stuff to for years  (heard that before ?)  . Well it had all been switched on for a week or two when they came back with another chap to do a load of 'extra tests' specially for the 'extra certificate' he had requested.

    My strong suspicions it that they had never been asked before, probably never bothered before, and were a bit thrown by it.

    Quite a neat job though, and in the end the paperwork matched the installation and looked OK apart from  the dates.

    Still waiting for the plumber who came with that team to register the replacement boiler he fitted though - and in the mean time I have redone about 90% of his wiring.  ...  :-)

    meanwhile the company that oversaw and did the kitchen have folded.
    Mike.

Reply
  • I imagine he or she forgot and managed to tick the paperwork later from the comfort of the bar of the Dog and Duck, or some similar location.

    The gap between the  "regs world" and what happens 'in the field' can be huge.


    My ageing parents had their kitchen re-done a few years ago now,  and due to work, I was not about to go and supervise/ be a pain to the contractors.
    I did manage to mention to my dad to ask for the test results and certs from the sparks, as the moving of a few sockets suddenly developed a need for a new CU to replace the one I had been merrily adding stuff to for years  (heard that before ?)  . Well it had all been switched on for a week or two when they came back with another chap to do a load of 'extra tests' specially for the 'extra certificate' he had requested.

    My strong suspicions it that they had never been asked before, probably never bothered before, and were a bit thrown by it.

    Quite a neat job though, and in the end the paperwork matched the installation and looked OK apart from  the dates.

    Still waiting for the plumber who came with that team to register the replacement boiler he fitted though - and in the mean time I have redone about 90% of his wiring.  ...  :-)

    meanwhile the company that oversaw and did the kitchen have folded.
    Mike.

Children
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