final

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  1. C

    MCCB used as a final circuit supply

    Currently pricing a 250a Power upgrade for a small warehouse, the new 6 way 250a MCCB panel will essentially be used to supply x2 fuseboards however i want to have the MCCB panel also supply the larger plant as i want the MCCB panel to take the heavy loads as the client said he will never be...
  2. S

    Ring Final discussion

    Hi all, I had a fault on site today I've not encountered before. if anyone could shed some light on a similar fault they may have encountered before that would be helpful. I was changing some damaged socket fronts over and I noticed the cables had signs of over heating so I thought I would do a...
  3. D

    EICR code for hybrid final ring cir

    Hi all new to form so thought I would as a question. Testing a final ring circuit & all is normal apart from the live / brown legs of the circuit which are too short to reach the MCB so they have connected them together in a block & extended it within the CU via a 6mm to the MCB Just wondering...
  4. W

    Wiring of ring final circuit

    Always ask fellow sparks this and always get different answers, what do you feel the quickest way of wiring a ring in say a flat for example. Do you piggy back it round getting your 2 legs into each room before dealing with the wiring of the sockets in each room. Or do you just wire to each...
  5. T

    Ring final routing in loft conversion

    Good evening All. Maintenance electrician here moving into domestic installations. What I'm still struggling with is the ring finals routing, especially in loft conversions. I am wiring one at the moment. Can you please have a look at the diagram below. Apologies it's very basic and rooms are...
  6. T

    Running ring final cables in loft eaves

    Hi All. I am wiring a loft conversion and want to avoid covering cables in the insulation. I can clip the cables to the studs on the other side of the wall in the zone parallel to the socket outlets. Is this sensible thing to do or would you rather run in the holes through the joists and apply...
  7. V

    Have come across a 16A Ring Final

    I've not come across this before. The current regs state it should be on a 32A MCB. I've been asked to re-wire a bedroom which will involve extending this ring. It already serves two other bedrooms and the lounge. I know I probably should tell the client to upgrade this MCB to 32A, but is it...
  8. J

    UK Find a Fault on a Ring Final Circuit

    I am not a qualified electrician, I was employed as an electrician after my MoD electronics apprenticeship but that was 30 odd years ago. So I have basic skills and an insulation tester with a low resistance capability. This is an old installation with a new cu installed in 2014 (EICR etc...
  9. N

    When working on circuits do you isolate whole board or just the final circuits using MCBs ?

    When working on circuits do you isolate whole board or just the final circuits using MCBs ? Or is there any instances when the whole board has to be isolated even if you are working on few final circuits? Thanks.
  10. M

    C&G Level 3 Project Question (Cafe ring final sockets length)

    Hi guys I'm a bit frazzled by the wording on the main project. So, we are told to keep the max circuit length down to 30m, tutors said that isnt physically possible so just try to keep it under 40m and they noted that the socket circuit was a bit of a mental one and that the 30m guidance set...
  11. I

    Ring final circuit Zs.

    Can you get the zs by using a earth loop impedance tester. I was taught if there's 2 rings circuits, you can do r1,r2, rn /4 on 1 On the other ring you can plug in the earth loop impedance tester and measure the zs. If you do it that way you must write in the observations you measured. Have I...
  12. V

    CPC low R2 continuity reading ring final

    Hi, I've just been testing a ring final before installing an outdoor socket and I got an R1 and rn of 0.6, but instead of 1.01 for R2 I got a range of readings from 0.1 to 0.51 and it wouldn't settle down, so I couldn't continue the tests. I know parallel paths could cause a low reading, but...
  13. I

    MCP final exit location

    Hi all, Any advice on where to locate a manual call point in a commercial premises (shop) if there is nowhere either side of the entrance or close to where one can be positioned - or what have others done in the past? Thanks.
  14. R

    Extension of ring final circuit

    Hi there all, I have a property and I have noticed the following wiring (please see below) in one of the rooms in the house. It looks like the ring circuit has been extended. A single 2.5mm Twin + Earth cable (in red) is providing power from the consumer unit which feeds a chain of electrical...
  15. 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...
  16. 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...
  17. S

    Final vat return

    As above,have deregistered for vat(I was in cash accounting scheme) and am filling in final return,end date 13/11/20. It seems,I have to account for vat on sales invoices unpaid on 13/11.Do I enter the entire invoice details or just the vat content for the final payment?Also for inputs,can I...
  18. T

    4mm ring final circuit

    Evening all Pricing a bungalow that has 300mm insulation in the roof, as im going to be wiring around the corenrs as much as i can and through the middle would you use 4mm on the ring final circuits? I want to use 2.5mm radials for bedrooms and living room but my boss is old school and wants...
  19. V

    Ring Final Test - Neutral >19.99kOhms

    Just checking, what I think I already believe. Doing a pre-install test of some outdoor sockets on a ring final. So far, confirmed bonding, incoming polarity, Ze and Pfc and RCD Test on circuit, everything fine and within regs. However on testing Ring Final, Line came out fine (0.7), Neutral...
  20. J

    Coding for a Ring Final Circuit 1.5/1mm

    Afternoon all, A quick EICR question. I have found a Ring Final Circuit that has been run in 1.5/1mm twin and earth. It is RCD protected and OCPD is a 16a type B MCB. All testing has come back as expected for a Ring final that has been installed in 1.5/1mm and the measured Zs is well within max...
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