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  1. J

    Problems with local DNO

    While doing a few initial tests during a quote for a rewire the ZE results were around the 3 ohm mark on what appeared to be a TNS system. An old iron conduit with two core cable inside and a steel clamp around the intake for the earth. initially explained to the customer, and got them to...
  2. J

    Insulation resistance on new installation

    Bit of an update. Been back this morning. The Oven that was previously giving readings of around 1Mohm LN-E now sitting around 3Mohm after drying out a bit. Individual circuit IR testing of all installed circuits live conductors linked to earth gave results of over range for all circuits bar...
  3. J

    Insulation resistance on new installation

    Original readings were low yes. However However had risen when tested a week apart. And those readings were not unusual for what was essentially a freshly plastered install.
  4. J

    Insulation resistance on new installation

    Unfortunately pretty much all of the appliances have been stored in the garage. As I said, installation was tested and certified around a month ago and everything was satisfactory with regards to resistors in parallel, it’s as expected, whole installation lower than lowest individual reading...
  5. J

    Insulation resistance on new installation

    Yes split load board.
  6. J

    Insulation resistance on new installation

    I have recently completed a rewire as part of a complete back to brick renovation in a pretty standard domestic property. Upon carrying out initial verification I uncovered a few strange IR readings. Multiple circuits with low(ish) readings of around 150-200Mohm. However they all tended to rise...
  7. J

    Insulation resistance on modern installations

    On initial verification of new installations I have been having a hard time with insulation resistance. With RCBOs, fixed LED luminaires, intelligent dimmer controls and other sensitive equipment now the norm on almost all installations how do we overcome this and still carry out effective and...
  8. J

    Hello mate, I started my transfer to Napit in March!! With Covid it’s taken forever. they...

    Hello mate, I started my transfer to Napit in March!! With Covid it’s taken forever. they have been really helpful throughout though. I’ve had a couple of assessments cancelled. And am still actually waiting for one. All the business checks have been done by email though. I’m waiting for a...
  9. J

    c2 or is it

    I haven’t got my copy to hand, however, Although I don’t think it is explicitly written. I would argue that 433.1.204 and appx 15 state that the reason a 32a OCPD is allowed on a RFC is that it is unlikely that at any point on the Ring final is likely to exceed 20a. By installing 6 x sockets...
  10. J

    c2 or is it

    How is a spur off a Ring final circuit wired in 4mm twin and earth a C2 observation? How is it likely to become dangerous? Has the tester inspector provided any reasoning? An EICR is checking for compliance to BS7671, not coding because it’s unusual, or “I wouldn’t have done it that way”! In my...
  11. J

    Help with wireless switch

    I can second the Quinetic switches. Used them a few times with no trouble whatsoever.
  12. J

    Verifying water bonding

    Can you see the connection behind the toilet? If I could see it, and test to the pipe work as you’ve said, I’d be happy to carry out the minor works you have described. Then advise the customer about the situation, maybe talk to them about an EICR to find any other hidden nasties? Can you see...
  13. J

    What qualification is actually needed for EICR on private rented? Race to bottom.

    As others have said this is not correct. I have recently gone over to Napit from Stroma. For EICR work I needed to prove 2394/5, professional indemnity and previous EICRs. However, what is true is if you don’t have these Napit will sell you a 2 day self learning or 5 day trainer led course...
  14. J

    Has my electrician done a bad job?

    The Cu in side looks fairly neat and tidy (from the outside) I’d have a word with your electrician. From the photos you’ve sent, I’d still say a second meter enclosure outside would be the neatest solution. Let him know that you’re not happy with the installation as it stands, definitely mention...
  15. J

    Has my electrician done a bad job?

    So it looks like you have had to situate your consumer unit a fair distance from your metering equipment? The max length of the standard cables from your meter to The consumer unit is 3m. Your electrician has correctly said that the meter tails need mechanical protection if they are to run...
  16. J

    A new smart meter is tripping RCD for 7 hours every night & I have a theory

    The fact the economy 7 CU had its own neutral but now is shared with the main CU would be where I’d look first. Where is the neutral supplied from in relation to the RCD? More than likely it’ll be a really easy fix. A N-E fault would probably trip whether the board had a live feed or not. Ie...
  17. J

    A new smart meter is tripping RCD for 7 hours every night & I have a theory

    Unfortunately it’s nothing to do with the supplier/DNO as the fault is on your equipment. It’s hard to see from your photos. What have you been provided meter wise? Do you still have 2 seperate, or are both tariffs supplied from one? do both boards share one neutral from the new meter? Does the...
  18. J

    Verifying polarity on radial ccts

    I agree with you and think I was taught the same. I know I was always told that there is nothing stopping you recording the values on an EIC even if they aren’t required (R1+Rn or resistance of MPBC). Even though there is no mention specifically of an R1+Rn, I think it does say you have to...
  19. J

    Verifying polarity on radial ccts

    On initial verification R1+R2 needs to be checked at every point on the circuit not just the furthest. This will then prove CPC continuity and polarity. if you can’t see the connections, for example sockets on a radial, what’s to stop you doing a quick R1+Rn or a R2 at the earth pin if you can’t...
  20. J

    Coding for a Ring Final Circuit 1.5/1mm

    Bit more info, it is a 2 bed flat. The customer has never experienced any nuisance tripping in the 5 years they have lived there. There are actually 2 RFC both installed in this way, one is the kitchen ring. my worries are that if someone has installed a RFC in this way, can I trust that they...

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