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On the subject of pulling the DNO fuse.

alanblaby
There have been a couple of reports here of the DNO confronting electricians who have pulled their fuse.


It's getting closer to home, a work colleague was doing a CU change on a domestic house last week, no isolator fitted, so he pulled the fuse (no seals present).

South Nottinghamshire.


Around 90 minutes later there was a knock on the door, a guy from Western Power was investigating a power loss at the property, reported by the Smart Meter phoning home.

He gave the sparky a talking to, and warned they are getting strict in pursuing people who do it, he said meter fiddling was rife, so any loss of power is checked out asap.
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    Jaymack:

    I have an ongoing situation, I started an EICR and found Zs to be 1.3 ohms for TN-S, measured with the SSE main fuse removed. SSE have eventually sent someone out and have now decided to dig up the drive and lay in a new supply. This is another case where someone (Yours truly), who is authorised to do so, has found a safety issue caused by their supply. I think that they must be in a quandary as to whether to suffer the lesser of 2 evils, by authorising registered electricians to test at their incoming supply or having a sitting problem. A further consequence is that there are 2 supplies to outdoor buildings that may now require T.T. if they supply a TN-C-S.




    I am confused, but may be it is due to the time of day.


    Why do Zs with the main fuse removed; and how? With your probe in the live terminal of the service head?


    In any event, the new supply will almost certainly be PME, which does not necessarily require TT in the outbuildings.

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    Jaymack:

    I have an ongoing situation, I started an EICR and found Zs to be 1.3 ohms for TN-S, measured with the SSE main fuse removed. SSE have eventually sent someone out and have now decided to dig up the drive and lay in a new supply. This is another case where someone (Yours truly), who is authorised to do so, has found a safety issue caused by their supply. I think that they must be in a quandary as to whether to suffer the lesser of 2 evils, by authorising registered electricians to test at their incoming supply or having a sitting problem. A further consequence is that there are 2 supplies to outdoor buildings that may now require T.T. if they supply a TN-C-S.




    I am confused, but may be it is due to the time of day.


    Why do Zs with the main fuse removed; and how? With your probe in the live terminal of the service head?


    In any event, the new supply will almost certainly be PME, which does not necessarily require TT in the outbuildings.

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