ring circuit | Page 6

ring circuit

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  1. P

    radial or ring circuit

    hi can any one help i have nearly finished my domestic installer course , i am planing on putting 2 sockets on a radial circuit i have disided to use a 20a rcbo and 2.5mm t+e fan lights and radio of the shower unit run of a 12v selv transformer wich i am going to run off a fcu 13a then...
  2. C

    rcbo on ring circuit

    iv got a 32 type b rcbo covering a socket ring circuit with 12 points on it. its a tns system. it on a run of about 45metres my problem is i cant seem to get it trip within the acceptable time. 1x 198ms 5x way above 40ms iv replace it with another unit thinking the rcbo was faulty but im...
  3. W

    Ring circuit problem

    hi can anyone give some advice on a problem with a ring circuit.when testing end to end everything fine,when testing r1 ,r2 everything fine,problem is with insulation test,live to neutral showing dead short.also if i disconnect all links i get a continuity reading on the sockets where i should...
  4. Q

    insulation test on a ring circuit

    hi there, while completing an insulation test on a ring circuit i have come accross a few problems. insulation between l-e and n-e are fine, 299megs, but insulation between l-n on both up and down rings are showing no reading, any sugestions?? r1 r2 rn are all showing low ohms on both rings, R1...
  5. mrloy99

    ring circuit length concerns

    I have just recently started a new job-its a nursing home and I have been giving the work of 1st & 2nd fix to the 60 odd ensuite rooms.The job is on 2 floors and there is only one dist board on each floor.I have been instructed by the foreman to wire one ring(and one lighting circuit) to do a...
  6. M

    Ring Circuit testing

    Hi I have installed a ring with 7 sockets on it when insulation resistance testing these are the results i get L-N >500Mohms L-E >500Mohms N-E 6.8Mohms as this is a new circuit i am not willing to accept the N-E reading of 6.8Mohms as i consider it well low although it does pass the...
  7. S

    Incomplte ring circuit - urgent help please

    I have just installed all new electrics to a new kitchen. Builders removed th old kitchen and part of wiring where it held them up. However, the new ring i have installed has a know feed from one end but I am unable to locate the other end. Solid floors so all wiring under upstairs floor making...
  8. 1

    advice needed on ring circuit

    i have a ring circuit with 9 sockets on it, somehow 1 of the legs between sockets was wired in 1.5, is this ok if not is it possible to disconect the 1.5 leg and have 2 radial's and what size breaker would they need. if i do have 2 radials, 1 will have 8 sockets the other will have 2.
  9. W

    ring circuit test

    Hi all just wanted to confirm as got the nic man and anything that comes up, want to be confident in the answer. Am i right saying that the r1 & r2 reading on a reading circuit should be ruffly the quarter of the end to end readings added up ie L2L=0.26 N2N=0.26 L2L=0.43 TOTAL = 0.95...
  10. G

    ring circuit determination

    hi everyone. new to this. just carrying out a pir on a pub, and when looking at the d/b wiring, the neutrals/cpc etc dont marry up to the breakers. on the pir can i just limit doing a ring final test and code it or will have to persevere and find the right cables. as its a pub up and running i...
  11. B

    ring circuit question

    Hi, im having trouble with a task ive been set at college. Via testing at the cu how would you identify that the phase and neutral are from the same leg for instance if you cant see the incoming outer sheath. I think its something simple im missing, or im just being stupid. Cheers.
  12. M

    ring circuit line earth fault

    just want to tell you about a fault i had to fix yesterday. I was doing a periodic report and when i did the ring final test it showed a line to earth fault. Old wylex board no rcd. After a few hours of breaking the ring down i found that a screw was touching the line conductor only in a...
  13. Amp David

    Ring Circuit Continuity

    Had an RFC to test today which isn't an issue, but not 100% sure as what action to take, if any. End to end readings were - Line 0.52 ohms Netral 0.60 ohms CPC 0.87 ohms I'm happy with the Line and CPC readings, as CPC is 1.67 time that of the line. The only reason for worrying about my...
  14. R

    Ring Circuit - Sockets Question

    Afternoon everyone! thatnk god its Friday!! Im looking for some help / advice A friend of mine has moved into a new house. The house is old with brick walls. nightmare. He wants some new sockets in with minimal damage to the walls and without lifting to many floorboards. So I was...
  15. A

    Ring Circuit on its Last 'Legs'?

    Scenario: Landlord has put in a new c/u in a house, then called me to test and certify it! The wiring and c/u were actually ok - off the shelf unit complete with mcbs, dual rcds, and main switch, all BS numbers good. It's a 3bed terrace, old colours and definitely ageing, looks like lots of diy...
  16. S

    Ring Circuit in Mini Trunking

    Sorry to ask such a basic question. I want to surface wire a 13A ring circuit using 2.5 sqmm T&E in PVC mini trunking. If I run 2 cables in the same trunking to a socket , I note that the de-rating factor for two cables bunched is 0.8, which gives 23 x 0.8 = 18.4 A - i.e. below the required 20A...
  17. B

    Is it likely to be a light ring circuit?

    In the process of changing a CU Ive discovered the lighting circuits are using 2x 1mm Twin and Earth though Iv not invetigated fully at this time is this likely to be a ring light circuit, if so is this common and how should this circuit be tested??? If not is it likely to be a radial using 2x...
  18. M

    Ring Circuit to a connector box and radiaal onward

    I recently came across a ring circiut which was run to a connector box unfused and various sockets i.e living room radial, bedroom 1 radial and bedroom 2 radial sockets all connected to the ring from the connector box no fuse. is his corrrect and pls state regulation number where i can refer...
  19. C

    Ring Circuit Values

    Looking for some advice, I have tested a property and on the ring main circuits the values do not tally up using the formula (r1 + r2) / 4 = R1+R2 Although the R1+R2 tallys up using the formula R1+R2 = Zs - Ze Is this an actual fault that needs recording on a periodic ? I have been...
  20. S

    Kitchen ring circuit

    If a ring main is needed to be installed with one leg of the ring passing through a stud wall with thermal insulation (Inst. method 103#) the current carrying capacity is 13.5A. To comply with regs on a ring final circuit, the current carrying capacity has to be at least 20A for a 32A breaker...

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