ring main

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  1. S

    High reading on a R1 + R2 test on a ring main

    Hi I've done a ring main R1 and R2 test all my readings are around 0.15 ohms apart from one which is much higher at 0.83 it is not on a spur it is part of the ring any ideas or is this ok thanks
  2. G

    Kitchen radial or ring main?

    Hi Folks. First post so be gentle.... I have inherited a house which is in need of a good wedge of TLC, we decided to rip out the old kitchen & start afresh. The wall that held the old consumer unit was going & we got a friend of the wifes son to come round to have a look at what was entailed...
  3. D

    Ring main Snags

    Started on a job today, where the customer wanted a new consumer unit to 17th edition standards, and a check over of Electrics which they know is something weird. Started doing some testing before i ripped it all out tomorrow, and found Circuit 1 and Circuit 2 supplying the main ring, only dead...
  4. R

    Continuity at socket on ring main

    Replacing cracked cover on ring circuit, the mcb was turned off , circuit dead tested with volt meter and got beep continuity on L-N L-E N-E, . Ring working before replaced the socket front . Im thinking because appliances with neons pugged in on the ring and it being TNC system that this...
    • ryan77
    • Thread
    • before circuit continuity insulation main resistance ring ring main socket tester
    • Replies: 69
    • Forum: UK Electrical Forum
  5. D

    Ring Main Screeded in floor

    Can someone please advise me on the best way to terminate cables that are screeded into a floor ? A socket's being removed as part of a wall removal and the cables are screeded into the floor so can't simply be pulled back. Any advice greatfully accepted.
  6. B

    Too large a ring main

    I recently tested a new build (mostly new build) and found 45 sockets on a large ring main in an office environment. My r1 was 1.6 ohms rn 1.6 ohms and r2 was 2.7 ohms which made my r1+r2 1 ohm roughly my zs on the circuit was also 1 ohm although I didn't test all of them. the protective...
    • Boaky
    • Thread
    • large main ring ring main too
    • Replies: 34
    • Forum: UK Electrical Forum
  7. B

    Ring main size

    Does anyone know the maximum size ring main in an office I'm don't meters I mean r1 + r2 size The ring I have tested has a r1 and rn of both 1.6 and the r2 is 2.4 does this comply?? anyone know
  8. T

    Spur to an outdoor light, from a ring main

    Can I wire a outdoor light that is connected to the exterior wall, from a ring main, via a fused connection unit, is this to the 17th edition. Thanks
    • tomma
    • Thread
    • light main outdoor ring ring main spur
    • Replies: 15
    • Forum: UK Electrical Forum
  9. R

    Lighting circuit taken off ring main somewhere

    evening guys, ive come across lighting in one room of domestic premises that has been supplied from the ring main at some point. the cable coming from the ring is 1,5mm which goes through the switch then on to the 2 x 12V down lights. This is on an EICR I`m doing. There is no chance at all of...
    • Ross1
    • Thread
    • being cable circuit david lighting lighting circuit main off point ring ring main somewhere taken under
    • Replies: 67
    • Forum: UK Electrical Forum
  10. I

    adding of multiple sockets to different rooms on ring main

    hi guys need some advice as to which seems the best way to go. have a customer wants 4 sockets and a shaver point (via 3amp switched fuse spur) adding to existing ring main. Each new socket is located in a seperate room of the bungalowe (spread evenly accross the ring). No current rcd...
    • ianphilip007
    • Thread
    • adding break cable different enclosure main multiple ring ring main rooms socket sockets where
    • Replies: 9
    • Forum: UK Electrical Forum
  11. S

    Ring main question

    Guys, looking for a little advice from someone with more experience regarding wiring this ring main. I am re-wiring a full house, which has a new extension built onto the back of it. The extension has two rooms, a Livingston and bedroom. So, I have wired the old part of the house in 2.5mm for...
  12. N

    Lighting on ring main...

    Hi all, I changed a light pendant at a friends house and found his lighting circuit in the extension (2 lights) is wired off the ring main!! I have looked everywhere and cannot find a FCU, so can only assume it is in a junction box under the floor! Carpets have recently been fitted so bit of...
    • Newbie90
    • Thread
    • lighting main ring ring main
    • Replies: 14
    • Forum: UK Electrical Forum
  13. N

    Cooker on ring main....

    Hi all, A friend of mine is looking at replacing his existing built in oven (not cooker as stated in title :D) with a new one. The existing one is on a plug top and is connected to a standard single 13a socket on the house ring main. There is no isolator either. The new one is 3.5 kW. The...
  14. C

    Fusebox being fed by a ring main

    Hi guys turned up to a residential property today to add a few double socket outlets only to find the fuse box in the area was being fed by a ring main on the main switch. Is this allowed ?
  15. S

    Ring main design calc

    Going through a ring main design calc for a course I’m on to determine c.s.a of ring final conductors. As we don’t know the load current for circuit we assume this to be the rating of the overcurrent protection device. I.e 32a. Only correction factor I need is grouping factor which is 0.45. 32 /...
  16. T

    Wiring a double socket spur from a ring main socket

    Hi all, I am new to this site and would firstly like to say hello :) I am planning on wiring a double socket from a ring main socket (has 2 x live/neutral/earth) My question however is what size wire should I be using; 2.5mm squared or 4.0mm squared? The length of wire will be approx 0.5m as...
    • tommatt90
    • Thread
    • circuit double electrician first main ring ring main socket spur wiring
    • Replies: 21
    • Forum: UK Electrical Forum
  17. dez0178

    Can anyone explain the best way to fault find on a ring main.

    Hi, Can anyone help please. I am doing an assignment for college level 3. I am trying too understand how to find a fault on a ring main circuit. I have read about splitting the ring, finding which end has the fault test again until the fault is found. But could anyone explain step by step on how...
  18. C

    Max floor area of a ring main?

    I always thought that you were allowed "unlimited socket outlets within 100m Sq." I got told today that if the floor area was above 75m Sq it required an addittonal ring and this was the "new Regs" . Is this correct?
  19. M

    Volt drop from radial spurred from ring main.

    I'm installing a gate supply at the end of a customers garden. My plan is to spur off internal ring main and run a radial roughly 100m to end of garden. Providing the long run cable is of adequate size to sustain 230v to the end of the garden am I right in thinking that I can tee off again at...
  20. E

    Ring main

    Testing a consumer unit with horizontal trunking above it. On investigation trunking has been used to extend the cables into CU. The cables are block connected in the trunking to extend them. Testing the ring continuity, r1, end to end I discover a dead short. 2 legs leave CU to be...
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