circuit

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  1. W

    Final circuit OCPD

    Hi guys, EICR Have a 125a cammando socket protected by a 100amp 100ma RCCB at the unit and it’s OCPD is the fuses in the cut out rated at 100a. Everything is within 3 meters. System is TT. Firstly is this rating of RCCB and supply suitable for socket? If not how would it be coded...
  2. A

    RCD Needed on Circuit to Solar Inverter (UK)?

    Hi, Our solar inverter is connected to a dedicated circuit from an RCBO in a CU in our garage. The RCBO was chosen, supplied and installed by the solar installers. The cable runs up from the CU in plastic trunking, goes through a concrete block wall to the next room, then is clipped to the...
  3. B

    ACA mock test question wrong?

    When I was doing the ACA exam mock test I have been looking at this question and think it’s wrong? A final circuit supplying a 2 kW boiling water tap is wired using 2.5mm2 PVC insulated copper conductors with a 1.5mm2 circuit protective conductor, and is 15 m long. The installation has a Ze of...
  4. G

    UK Should combi boiler be on dedicated circuit.

    (DIYer first time post) I Purchased a property in 2021 which had just had a full rewire by a reputable company(allegedly) a month before i moved in, previous owner organised and paid for this. I recently changed my bathroom extractor fan and was surprised to find the fan, bedroom lights, and...
  5. B

    Adding spur to radial circuit

    Evening all, I’m hoping for a bit of advice on radial circuits. My utility room is supplied by a sub-CU from an MCB on the main CU. The sockets in the utility room are wired on a 20amp radial from the sub-CU. I would like another socket adding - is it acceptable to run 2.5mm cable from an...
  6. N

    UK Circuit with 3 switches and 4 lights no longer working

    Hi all. We have a complex circuit in our house which I believe has been wired incorrectly. Despite that, it has been working until I changed two light fittings at the weekend (these are temporary and will be replaced with new lights after decorating). This is how it's configured, with both...
  7. 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...
  8. FlashGordon

    Automotive (bike lights wiring circuit)

    So, I am a relative beginner (only fiddle when needed and usually following clear instructions or diagrams) when it comes to 12v switches and relays, but I am needing some help with a set of switches and a micro relay I purchased from Amazon (those who purchase here know most stuff comes with...
  9. Brownie91

    5.0 Distribution circuit section, N/A on paperwork?

    Hi all, This may be a silly question but here goes. When completing an inspection report for a small domestic installation (EICR not install). Would you mark all tick boxes under 5.0 Distribution circuits as N/A seeing at this is for a circuit/wiring feeding another distribution board? Thanks
  10. T

    Stuttering short circuit in a single circuit (several sockets)? How to identify short circuit?

    Hello. There is a persistent short circuit on a circuit (a fuse switch). All plugs have been unplugged. All sockets are free. I have continuous beeping continuity and “30 Ohm” resistance on several sockets. I also have 30 ohms on one outlet, but a stuttering beep. Can I narrow it down by...
  11. V

    My outlet is on two circuits at once...

    I have an ancient home with knob and tube wiring, and a breaker box from the 70s. It's all a mess, with circuits powering random things on opposite ends of the house. The breaker box has breakers with multiple wires spliced or coming out of the stud and all the neutral studs are overloaded with...
  12. tony9i9i9i

    Proving power circuit is fine?

    I have a customer saying her TV keeps going off, I've been to visit 3 times, and the circuit has tested fine, with good continuity on the ring, and the voltage is bang on. I removed and few covers and all looked fine, the terminals were correctly tightened. Not complaining about anything else on...
  13. W

    Fault on lighting circuit

    Bear with me because this is long. So got an intermittent fault on the upstairs lights. Trips the mcb after a few hours, getting a reading of 0.01 mega ohms between live and earth at the board, tested cable going to db from first switch and it’s clear. Tested the cable going from first switch to...
  14. P

    12 volt bulbs on 240 volt circuit

    Hi just seen the bulbs on my outdoor Xmas lights are 12 volt 3 watt on 240 volt circuit. How can they be working? They do!
  15. B

    UK Circuit design for computer circuits.

    Hi Guys, I'm currently designing an installation that will be used to configure multiple pieces of electronic equipment such as PC's, Servers, All in ones etc. Its going to be set up in bays such as the picture attached. With it being a full socket installation I was hoping for some guidance if...
  16. 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...
  17. R

    Is it enough to prove safe isolation on a circuit which is controlled by a PIR on a seperate circuit ?

    Hi Guys currently doing my apprenticeship and looking for some external advice regarding safe isolation. Situation is a circuit supplying some external street bollard lights and 1 or 2 street lamps. This circuit is fed via a single phase MCB then through a contactor all located in the db. The...
    • Rob678
    • Thread
    • circuit controlled enough isolation pir prove safe seperate
    • Replies: 3
    • Forum: UK Electrical Forum
  18. L

    help with circuit design

    I have been asked to provide a lighting circuit outdoors for 18 lights on a canopy. The circuit is fed from a toilet block that has a 100A supply to the meter. The customer has now asked if they can have some extra sockets. They want a 16A commando socket around 60m from the board. They then...
  19. P

    Shared immersion heater circuit

    Hi everyone Is it permissable to connect 2 immersion heaters to one RCBO and supply cable? I'm installing a water cylinder (which has 2 immersions) in a new utility room, which used to be a kitchen. I want to repurpose the old cooker supply cable which is 10mm. If it's legal, I want to feed...
  20. T

    Filling out an EIC when multiple people have worked on a circuit.

    Hi quick question, we are a maintenance team in a factory, sometimes we have jobs that carry on to the next shifts, sometimes up to 3 people could be working on a job at different times, how do you go about filling out a certificate, should you just list all the installers and signitures on a...
    • tomodo
    • Thread
    • certificate circuit eic filling multiple mwc out people when worked
    • Replies: 3
    • Forum: UK Electrical Forum

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