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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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    why a registered sparks can pull a fuse from a single phase head, but not a three phase one which is made up of three identical items.




    Purely ease of drawing a clear border - It is a bit arbitrary, and I suspect they really wanted to say "we only want folk we have not trained ourselves pulling the lowest risk stuff", and found this a convenient  definition.  More importantly it has been working well for years, and everyone likes it.

    (Though I understand that when no temp seals are to hand, some 'emergencies' are interpreted more liberally than others)

    Some  'domestic' 3 phase cut outs are not 3 single phase fuses in individual insulating enclosures, but far larger assemblies, such as the boxes that may be found in a block of flats, where all 3 phases are beside each other, and a phase  to  phase fault is credible risk.


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    why a registered sparks can pull a fuse from a single phase head, but not a three phase one which is made up of three identical items.




    Purely ease of drawing a clear border - It is a bit arbitrary, and I suspect they really wanted to say "we only want folk we have not trained ourselves pulling the lowest risk stuff", and found this a convenient  definition.  More importantly it has been working well for years, and everyone likes it.

    (Though I understand that when no temp seals are to hand, some 'emergencies' are interpreted more liberally than others)

    Some  'domestic' 3 phase cut outs are not 3 single phase fuses in individual insulating enclosures, but far larger assemblies, such as the boxes that may be found in a block of flats, where all 3 phases are beside each other, and a phase  to  phase fault is credible risk.


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