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final

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  1. R

    I Can't See How This Works...

    Here's the scenario: Ring Final Circuit Design Current = 20 Amps Circuit Breaker = 32 Amps (may well be using an RCBO - but that's another story) Ring length total (end to end) < 45 meters Correction Factors - grouping factor of 0.78 (reference method E with 9 other circuits) Gives an Iz of...
  2. C

    Advise for a final year apprentice.

    If in your years of experience you could pass one bit of advise to a final year apprentice about to qualify what would it be and why? Is there anything you wish someone a little older and wiser had told you before you finished your time?
  3. D

    How do I record Siemens Box No. 22465A on installation Cert.

    I will be installing a new Ring main for a kitchen install and have come across a cut-out that is totally new to me. Has anyone seen one of these..and how do I record its details on my Certificate.
  4. kkkkk

    High continuity resistance on ring final circuit

    Hi peeps I have continuity measurements on a ring final circuit of: L/L 1.4, N/N 0.78, E/E 1.7 Loose connections somewhere? There is a new CU with RCD. Insulation resistance measurements are good. There is a boiler added into the circuit as a spur. Any suggestions or comments? THANKS!! :) :) :)
  5. P

    dodgy ring final

    Hi need some advice, changed a db today everything was fine until testing ring final,there was no continuity on r1 r2 rn so no ring now but the 1 leg is supplying power to all the sockets in the house so basically a radial, it was on a 30 amp old fuse so changed to a 20 amp mcb did a i/r test...
  6. H

    Continuity of ring final

    Hi guys I am new and struggeling. Can any one pleas tel me why r1+r2 have to be divided by 4 pleas
  7. R

    no cpc continuity on ring final, strange readings !

    Good Evening all, Been at a property today starting intial tests for a board change tommorow. There are two ring circuits, on one of the ring circuits i had an open circuit on the cpc. Live and neutral where fine 0.4/0.4. I started to locate the break by splitting the legs and joining the live...
  8. XS Training

    NVQ 3 Electrical - Final Registration 31st December 2013

    We have received many enquiries about the final registration date for the NVQ 3 Electrical Installation and can confirm that the final registration date is 31st December 2013 with the final certification date being December 2016. We are now offering people the opportunity to secure their...
  9. S

    Broken CPC on ring final

    My friends downstairs sockets are tripping the RCD. First thing I did is unplug everything on the circuit, switched on the MCB and the RCD tripped. Tested continuity of L-L N-N CPC-CPC between the legs. CPC has no continuity whatsoever. Could anyone advise me what would be my next step to...
  10. S

    30A JB's and 32A ring final circuits

    ive been having a dispute with another electrician about using 30A JB's on rings a ring is made up of 2 legs of 2.5mm T+E, 2.5mm T+E ref method C has current carrying capacity of 27A now surely the JB has to be rated higher than the cable, but using a 30A jb although this is less than the 32A...
  11. R

    EICR code for 4 core 1.5 MICC in Ring Final Circuit.

    Which code would be considered appropriate for a ring circuit protected by a 30A rewireable fuse wired in 4 core 1.5mm2 MICC cable installed to method C. Circuit consists of 12 double sockets serving a large chapel area in a church dating to approx 60 years. I have put a code 2 for...
  12. H

    Final connection of shower feed

    I need some advice regarding the final connection of the tails for a new dedicated consumer unit for a new shower. There are connecting blocks between the meter and existing consumer unit with spare ways but without pulling the service fuse I can't connect up without working live. Is this a job...
  13. Marvo

    Good luck in the final

    Congratulations to the England ODI cricket side on making it look easy today. Not exactly the game I was hoping for with my fellow countrymen being 80 for eight wickets at one point....but hey, there's always a next time. Good luck for the finals.
  14. F

    Ring Final CCT - Cable clipped direct to an outside wall

    I've been asked to install a new RFC at a Ground Floor Flat. The Socket outlets for this circuit are going to be in a room at the rear of the property on the other side of the flat from the CU - the owner does not want me to install the cable through the Flat, but wants me to route the cable...
  15. J

    Adding RCD Protection to a ring final

    If I add a rcd to a ring final at the fuse board because im adding extra sockets and moving some other I need to test all old sockets as well right ?? the reason I ask is ive quoted for the job and was discussing with the customer yesterday what I had to do, I saw her tonight at the pub and she...
  16. E

    Volt Drop

    Hi all, Just wanting to clarify regarding volt drop. Client is looking to add lighting to garden, to be supplied from 13a FCU, load on FCU will be less than 1A due to LED lighting. The FCU will be an addition to a final ring circuit which serves dining room and lounge, protected by 32A MCB...
  17. S

    Ring Final Circuit

    I have a query about the Standard A1 Ring Circuit. It is my understanding that a 2.5mm2 cable is sufficient, this is because the current carrying capacity in a worse case scenario is 20A and because they are run in parallel this gives a total current carrying capacity of 40A and so a 32A MCB...
  18. G

    Ring Final Circuits ... each leg into a separate MCB!

    I was inspecting the electrical installation in a large 5-bed late Victorian or early Edwardian property that I am considering buying in Scotland when I came across the 'socket circuits'; 3 32A MCBs so I expected 3 Ring Final Circuits. Each MCB only had one wire so adjust assumptions - they...
  19. J

    final 2391

    Just found out I've passed my 2391 exam,well made up.
  20. A

    Ring Final Circuit Problem

    Hi all hope you can help had a spur to fit on an old ring final circuit today that is made up of the old 3092 and old twin and earth were it has been extended in the past the readings i got end to end L 0.16 N 0.16 E 0.32 added together 0.16+0.32/4 = 0.12 but when i carried out a figure of 8 i...

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