ring

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  1. S

    Ring final circuit results.

    Hey guys as some of you will know I'm studying electrical installation at York college. I've been trying to get some practice in with my MFT. My results were for the ring circuit. r1. 0.65 rn. 0.65 r2 1.06 Sockets. I was getting in the range of 0.31 ohms and 0.33. I had to open the sockets...
  2. M

    Underfloor Heating on Ring with 32 amp breaker

    We had our kitchen done a few years ago with underfloor heating. When the kitchen was done, a new CU was fitted and everything’s been OK so I didn’t really check anything. The breakers weren’t labelled which ----ed me off at the time so I labelled them all but forgot to check which circuit the...
  3. input33

    Found one leg of ring main disconnected

    My friend was moving into a new (to him) house and wanted to change a cracked socket, so I went to show him how - straight swap - seems straightforward. I'll call this socket A. There are two sets of twin and earth in the back of the socket (as you'd expect), but one leg was wired into a chock...
  4. N

    Extending ring final - any potential gotchas?

    Hello again, been a while. I'm wanting to extend a ring final and I'm at the 1st fix stage as part of some building work to open up our ground floor. Following demolition, a 2 gang socket is redundant in place, so my plan is to extend the ring and add 2 further 2 gang sockets. To join into...
  5. richje100

    Quick Ring Spotlight pro hardwire question

    Looking at getting their hardwire kit, I'm assuming ok to use 3core cable to a 3pin plug instead of going directly to consumer unit or wiring to back of plug socketas seen in many youtube videos? The latter 2 I'd obviously get an electrician in but I'm capable of wiring a 3pin plug. Thanks
  6. 154988

    UK Local RCBO protecting ring final alteration.

    Hi I completed a job recently where a hotel reception had a new desk fitted. The old desk dado was supplied via an RCD spur from the existing ring. This ring is fed from one of the very old Merlin single phase boards which I’ve been told you cannot retrofit Schneider ic60n RCBO’s in. I had to...
  7. A

    Diversity on a 20 Way or longer CU with many (low utilisation) ring mains

    Hello, A quick question which I suspect is becoming more commonly asked as we go towards having more ways in our CUs. Domestic dwelling, nothing too exuberent but during rejigging the large downstairs ring was split into three and some radials added, as well as seperate feeds to allow for a...
  8. G

    Issue with r2 reading on ring final circuit due to parallel paths

    Good evening, Been on and off on this project, they’re all brand new flats and now I’ve come back to carry out EIC tests. It’s all first fixed in steel conduit and have stud frames with caddy clips on, so naturally been told to earth back boxes. Before I left I mentioned to the QS running...
  9. F

    Moving a socket on a ring ciruit

    I want to move a socket on a ring circuit approx 5-6 feet, fitted cupboards coming in will cover it otherwise. It has 2 2.5 mm cables coming into it. In the cellar these 2 cables go into a round 32A connection box with screw terminals and 4 cables in it, the ring in, ring out and the 2 socket...
  10. J

    Extending ring

    Hi guys, I’ve just been to a customers house. It’s an old house which has a few radial and ring circuits for sockets. They want 4 extra sockets to be installed. The ring circuit is feeding the whole house (not kitchen) would it be ok to tap into the ring circuit feeding the house and add the 4...
  11. C

    Extend ring for boiler and outside socket

    DIYer question I need to add an FCU to the kitchen ring for a boiler and also an outdoor socket. I don’t want to extend the ring to the outside socket in case of water getting in. Can I put the FCU for the boiler on the ring and does a 3amp fuse in that have any effect on the overall ring...
  12. L

    UK Low voltage from live to earth, on a ring final.

    Why do I only get 50v from live and earth, I’m getting 240 from live to neutral. The circuit is a ring.
  13. S

    Unbalanced final ring

    I have seen a final ring that had the heavy appliances on one leg (L1). Drawing 19.5 amps in total, one leg (L1) was drawing 82% of the 19.5 amps of current. If the ring went up to 32 amps the 2.5mm cable would in theory be just safe enough under the 27 amp maximum. My question is, if 32 amps...
  14. Gooberstank

    RCD tripping only when high draw device and lighting ring is on.

    Hi. Wondering if anyone had any idea what might be happening. Last night I damaged a pendant light fitting by accident, not enough to stop it working. However later in the evening when my car charger started at 11:30PM the whole house RCD tripped. I only thought back to the light accident as...
  15. R

    UK Ring main or radial

    I am moving to a bungalow which I imagine will need a rewire. I've spoken to a local electrician and when I was asking if there would be a ring main for the kitchen and another for the two bedrooms and lounge he told me that ring mains are old hat saying that radial circuits are preferred. For...
  16. G

    UK Ring circuits

    Hi, I have a ring circuit for the lounge and a ring circuit for the bedrooms. One of the sockets in the lounge is fed from the bedroom ring circuit, whether for convenience of wiring I dont know. My question is, is socket fed from bedrom ring okay as it is. Reason I ask is that there is a test...
  17. R

    UK Ring Spotlight Camera Wiring

    Hello everyone. I’m looking at installing a camera on my garage. The garage has a 16A breaker for the sockets and 6A for lighting. Am I able to use some 1mm twin and earth to wire the camera straight into the 6A with the lighting? Thanks Ryan
  18. C

    Emergency stop buttons on workshop ring main.

    Please forgive terminology. This is a DIY question. Domestic Workshop in new (new to us - small charity) premises that has its own RCD consumer unit with a ring main circuit and a lighting circuit. Has a few single-phase bench tools, saws, pillar drill etc. It's an odd one, it really is...
  19. J

    UK Thermal constraints on a ring Electrical design question

    Hi all, I am working on my revision for the 2396 exam and wanted to see if someone brainier than me could advise, when completing the thermal constraints equation t=(k²*s²)/I² on a ring circuit do you input the ring for s² as (2*2.5)². Example1 : Fault current 211A t= (115² * 2.5²)/ 211²...
  20. T

    Working out the length of a ring finals circuit

    r1: 1.15 r2: 1.80 rn: 1.15 r1r2 0.69 To work out the length of a ring in 2.5mm twin would this be correct 0.69/(19.51/1000) = 35m or would you use the r1r2 before you divide it by 4?
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