ring

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  1. D

    UK Commercial Ring Main

    Hi All Need some advice please I have a site meeting this week on an installation on a site that I am responsible for routine maintenace An installation was carried out by a company hired by our client without any input from the company I am employed by I am seeking advice from forum members...
  2. timhoward

    Insulation resistance difference both ends of ring final cct

    Initial fault was RCD tripping, narrowed down to a ring final cct. IR tests on that cct with all loads removed were showing almost zero between neutral and cpc. So I broke the ring apart and eventually found the nail through a cable, and got that all sorted. Now its testing ok in as much as...
  3. D

    Ring circuit readings

    Hi all I am about 2 years retired after being NICEIC registered for over 20 years. An old customer just a little concerned about an EICR just been done on her property by someone else now with lots of N/A everywhere main one being no end to end readings (R1R2) entered for the ring circuits I...
  4. Kuba

    No reading N-N end to end on a ring main

    I’m doing some tests on my board at home in order to prepare it for an upgrade. It’s an old plastic GE board with no rcd protection. Doing continuity of ring final circuit on the main ring. When it comes to end to end tests at the consumer unit I’m getting no reading between neutrals. All good...
  5. S

    Ring Fused Spurs and overload protection (433.1.204)

    Just a quick question from a new qualified sparky. So in 433.1.204 when it says the Iz of the cable must not be less than 20A for a ring final circuit. Does this include a radial fused spur taken off the ring final? If you install it in 2.5mm in trunking then the Iz is immediately down to 20A...
  6. J

    Wagos on Final Ring Circuits

    In a ring if there is a 30A screw terminal junction box in the ring one spur can be taken off this. The j box terminals have three cables in them. Each cable in a Wago (or an in-Sure) has it own connection slot for each wire. This makes a difference. Wagos are mini bus bars. If a 32A four...
  7. H

    Is it advisable to feed a 1,600 Watt Quooker heater from a ring main spur?

    I will soon be installing a 1,600 Watt Quooker hot water heater for which a new 13A socket will be required. A ring main cable passes behind the kitchen cabinet that houses the sink and I have the choice of either inserting a single junction box into the ring and feeding the new socket via a...
  8. J

    Open Ring

    When a open r1 conductor is observed on end to end measurements what is a suitable observation to note on the inspection schedule? Would Co- ordination between conductor and overload device be included because the CCC has now been affected. Thanks
  9. H

    One socket down on ring - test identification

    Hey all, Training to be an electrician and trying to get my head around testing. If a socket was to have no voltage but all other sockets on the ring work, what example reading would I get to show it is in fact a fault on the ring? Would it be as simple as when I do my ‘little rs’ the tester...
  10. F

    Need Help: Mechanical Chime Won't Ring After Transformer Replaced

    Hi. Here's some background info. I am located in the United States, and have had a Nest Hello video doorbell working perfectly for a couple of years. It's powered by a 16V 10va transformer. I also have a mechanical door chime that rings when someone presses the button on the Nest Hello. The...
    • ftresi
    • Thread
    • after chime doorbell help mechanical need help replaced ring transformer won't
    • Replies: 14
    • Forum: DIY Electrical Advice
  11. D

    Insulation Resistance - Low Reading on Ring

    Newbie Testing Question: I am getting a very low IR reading between L&N on a kitchen ring (0.01M). The ring was working fine with no tripping before testing. Can anyone shed any light on what may be causing this low reading? Thanks
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