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  1. 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...
  2. E

    Main Equipotential Bonding

    To settle an argument, can anybody advise when 10mm bonding became the norm...Thanks. in advance
  3. D

    UK Swa as main earth ?!?

    So I have turned up on a job… someone previously has installed a 120mm 2 core swa from the meter to a barn building 160m away and them split off for the house and barn building in 25mm tails and have used the armour on the swa as the main earth. Both ends of the swa have been terminated badly...
  4. LewisM

    Axiom main switch compatibly (temporary)

    Hello, I hope you are well, a friend has lost power and it's the main switch that has failed I've got a bunch of different brands in the garage, does anyone know one which is compatible till Monday? Fairly modern one looks like Wylex style
  5. 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...
  6. Yellowhammer

    Extending sub main

    Hello, Planning some work for someone currently installing a new CU and a switch fuse in an extension, fed from a new DNO supply. Have turned up and had a look at it, mostly seems all okay other than the hockey stick being on the wrong side of the meter box. However, the 63A switch fuse is...
  7. B

    Installing an energy meter on a ring main

    Hi guys, I have a client who wants to install meters on every power circuit in order to monitor energy consumption etc. Just wondering if there is a specific method to wire up such a configuration on ring mains? As far as I can tell, I'd need to come out of the RCBO to the meter, and then have...
  8. N

    RING MAIN CONFUSION

    Hi guys. Having a weird problem in a house that has suddenly happened. One half of the ring main has 240ish volts (fluctuates of course), and the other half is dropping to 210v - This is when I test L-N and L-E…. N-E shows nothing. Whenever I plug a table lamp in the the faulty side of the...
  9. tidytech

    Consumer unit feeding another consumer unit via Main switch

    Can a domestic consumer unit feed another consumer unit, via the Main Switch. Details are: domestic property with 100A single phase supply, TN-C-S incoming supply to Main Switch on DBU1 Output from the DBU1 Main Switch, also outputs two two wires, that connect to the input of another consumer...
  10. I

    Is the main fuse big enough?

    Hello Shop with a 100A main fuse LED lights few amps max, cash tills, cash machine, roller shutter, auto door, nothing pulling much power but there are 5 motors totalling 80.5A FLA Realistically what sort of power would this site be pulling constantly? Slightly conecerned that it may be...
  11. cliffed

    comply to Regs to install a MCB for the Sub Main to the 1st Floor DB

    Replacing DB’s with all singing all dancing RCBO’s Problem’s we have now…Existing installation consisted of DB Grd Floor.. DB 1st Floor…Grd Floor DB supplies 1st Floor DB…16mm T&E installed IN fabric of building. DB 1st Floor supplies Remote Garage Block 16mm T&E With the Sub Main to DB 1st...
  12. P

    UK Shared income supply main fuse

    Hello, my incoming supply has one main fuse that feeds the next door naghbour it leaves my house to go next door as shown in picture..it's the single cables going through the hoteCan this be split, and how would be responsible for any changes.Thanks Paul
  13. A

    Bus bar chamber with no main isolator

    Evening, I've been asked to install a supply to a sprinkler system in a new installation that must be separate to the building electrical services. I.e if you isolate the building to work on the electrical services then the supply to the sprinkler pumps must remain live. The only way I can see...
  14. M

    Changing main RCD AC-type to A-type

    Hi, I'm back in the electrical game after 9 years break so feeling a little rusty! I'm adding an additional socket to a circuit but the main RCD feeding all the circuits in the consumer unit is AC type. Based on this, I believe I have to change this to an A type which is fine but the question...
  15. N

    SUB MAIN QUESTIONS. ADVICE NEEDED

    Hi all. I have been asked to take over a job an electrician has started, and has moved abroad. The house is a big mansion, with a 3PH supply, with 100A fuse on each Phase. The electrician has ran 2 25mm 3core armours to another 2 DB’s in the mansion, and there has to be a DB fitted where the...
  16. G

    Moving a ring main socket further along a wall

    Hi all, I'm planning to remove a stud wall seperating my dining room and kitchen. On the dining room side of the stud wall, there is a double socket which I want to move about 2 feet approximately along, and onto the back wall. The wires will be coming down from the ceiling as they all do on...
  17. L

    Anyone know more about these OLD BNO main isolators ?

    Ive mentioned it in another thread but thought I would make a specific post !! From a quick look its a "piston type " affair .The leaver lifts up and pulls out the rod in the middle .A bar has to be inserted to the rod that then allows the lever to roll upwards pulling etc . I'm old...
  18. dazmaster9

    Renault twizy main headlights not working

    Hi all, hoping someone might be able to help a little, we got our daughter a renault twizy, but the headlights do not work. The side lights work, the main beam works, just not dipped main beam. we: changed bulbs checked the fuses (all good) checked the 1 relay (all good) checked wiring...
  19. J

    Wiring an MCB beetwen RCD and Main switch

    Good evening, I wondered how the MCB between RCD and the Main switch is wired while watching this video. Photo attached. I assume a busbar link is connected to the main switch and mcb. Do the line conductors and the busbar connected at the same terminal and then go to the RCDSs? Link to the...
  20. D

    Main Electrics Isolator Switch

    Hi, I have received conflicting advice about Main Isolator Switches and would appreciate forum member's help to plan a way ahead. Looking to the future I might need a 7.4kW/32A charging point and the garage isolator is only 60A. 1. Recently, during a kitchen refurb, double pole Mains...
    • Deleted member 155212
    • Thread
    • electrics isolator main switch
    • Replies: 5
    • Forum: UK Electrical Forum

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