Recent content by sbwattam

  1. S

    Electric boilers and DNO notification

    Thanks. I suspected that might be the case, was aware a 40A MCB would take an overload of full 14kW load for a few minutes or so, but apparently its been fine, MCB isolated circuit ok so no welded contacts. We were there to do EICR so not going to start stripping down electric boiler to satisfy...
  2. S

    Electric boilers and DNO notification

    The cutout is 60A, boiler rated at 14.4kW which is 62.6A but supply circuit is 40A MCB. I don't know if there is some way to limit max output on the boiler in the settings as 40A MCB seems to be holding. We didn't install so no idea how it's been set up. But there is also induction hob and oven...
  3. S

    Electric boilers and DNO notification

    I was aware of those, even gov.uk website specifies those. I know what your suggesting is that it is a significant alteration but the DNO form has no section for anything other than PV, EV, Heat pump or batt. storage. It seems strange electric boilers are not listed given their potential current...
  4. S

    Electric boilers and DNO notification

    My company has recently done some air source heatpumps which require DNO notification and EV chargers which also require DNO notification. On an EICR today came across a 14.4kW electric boiler on a 60A supply (installed last year by others). Apart from the obvious issues I looked into whether...
  5. S

    Ups output voltage anomaly

    Many thanks for all your assistance guys. I've managed to get to the bottom of it after a useful conversation with a guy in the technical department for the UK representatives. He told me that this unit and many others still use the supply neutral as a reference point even when it is in battery...
  6. S

    Ups output voltage anomaly

    I was using a megger bmm2500 insulation / continuity tester on voltage setting but also a Fluke 1653b multitester, a fluke clamp meter and a dilog voltage indicator! I did wonder if it might be an anomaly on one of the testers, so tried the others however the readings were pretty much identical...
  7. S

    Ups output voltage anomaly

    I have been looking at an active UPS system in a lab feeding a small consumer unit and carrying out a periodic inspection of the fixed wiring (much help on avoiding problems with Zs values thanks to other posts on here). I did however come across an anomaly on the actual output voltages under...
  8. S

    MEM RCBO Pods not tripping whilst under test (a new one on me).

    thank god i found this post. exactly same thing happened to me. 20 rcbo's in DB and every one failed. Even went next door to check tester was working. Why does I'm pretty sure that when I have installed these before they have not had that information in the box but they do mention not to...

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