ring final

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  1. I

    Fused spur from ring final for exterior lighting

    Trying to calculate the voltage drop for a run on external lights supplied via 5Amp Fused/rcd spur from local ring final circuit. for a quotation and have got a bit confused re Voltage drop. 27m run in 1.5mm cable total load on lighting radial 420w. (no diversity as all lights either on or...
    • ianphilip007
    • Thread
    • circuit exterior exterior lighting final fuse fused fused spur light lighting ring ring final spur
    • Replies: 6
    • Forum: UK Electrical Forum
  2. C

    400v through a ring final circuit

    Hey guys, I had a callout the other day, 7 fan coil units where not working, these where supplied via a ring final circuit and once all unplugged the circuit engaged, I latter discovered all fan coil units had a dead link between line and earth under a 250v insulation test. The manager and...
    • Chrisday1990
    • Thread
    • another circuit final motors previous ring ring final through units
    • Replies: 5
    • Forum: UK Electrical Forum
  3. S

    Ring Final Circuit testing, What is wrong. Trainees only to answer please.

    You have been asked to carry out a full test on a ring final circuit. It is wired in 2.5mm single core cables. (I have made the test result values up to make things easier to work out). You have confirmed that the ring is continuous, and your r1 value is 0.5 ohm, your rn is 0.5 ohm and your r2...
    • SirKit Breaker
    • Thread
    • answer circuit final please ring ring final testing trainee trainees wrong
    • Replies: 20
    • Forum: Electrical Course Trainees Only
  4. K

    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!! :) :) :)
    • kkkkk
    • Thread
    • check circuit continuity final resistance ring ring final singles values
    • Replies: 20
    • Forum: UK Electrical Forum
  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...
    • pablo4321
    • Thread
    • dodgy final ring ring final
    • Replies: 18
    • Forum: Electrician Forum
  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. 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...
    • skamuk
    • Thread
    • broken cpc final ring ring final
    • Replies: 59
    • Forum: UK Electrical Forum
  9. 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...
  10. 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...
  11. 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...
  12. 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...
    • Jimmyb
    • Thread
    • adding circuit exactly final protection rcd ring ring final sockets
    • Replies: 9
    • Forum: UK Electrical Forum
  13. 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...
  14. 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...
  15. 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...
  16. S

    Isolation of Ring Final Circuit

    Here's one for you. In a foster home for naughty boys the client has a requirement to be able to "remove privileges" of TVs/PCs etc when necessary. They seek a means of doing this without having to get staff to use the Distribution Board. Would a DP switch of the correct capacity be the best...
  17. M

    ELECSA Certification Scheme Ring final continuity readings and Elecsa assessment looming...

    Hi I have my Elecsa assessment in under two weeks and ive never felt so stressed in my life! I've changed my C.U. to use as my job as i thought it would be easier but im really struggling with the testing especially on the downstairs ring final sockets. Ive done end to ends and got Line 0.61ohms...
  18. A

    ring final circuit breaker trips off

    Everytime i use the brand new iron and ironing machine after a few minutes, the breaker trips off. Its annoying to go to electric panel board turn on everytime. The iron and ironing board machine has 2200 wattts. The ring final circuit breaker got 32amp which is enough to protect the sockets...
    • Abot
    • Thread
    • breaker circuit circuit breaker final off ring ring final trips
    • Replies: 16
    • Forum: UK Electrical Forum
  19. R

    Two 2kW convection heater on ring final?

    Hi, I am about to refurbish two attached outbuildings for an old colleague as he wants to use them for his music teaching (one room for teaching space and one for parents waiting room). After deciding it would be too expensive to extend his central heating radiator feeds we have settled on...
  20. P

    Ring Final Circuit Testing

    Hi all, I'm still learning this stuff so go easy! I've just carried out a ring final circuit test. Having identified both legs of the ring I began testing between both ends of the line conductor, which has given me an infinite reading on the meter. I also got the same result on the cpc...

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