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  1. 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...
  2. 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...
  3. 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...
  4. 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
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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
  13. D

    6 swipe main shut off - overload code?

    Good afternoon - we're considering adding an additional breaker to our "main service panel" which is where the meter is located. That panel has 6 slots (I guess 12) with 5 double breakers currently. One breaker is 90 amps which feeds our interior panel which has lights, cook top, A/C condensing...
  14. T

    Replacing MK Consumer Unit. Main switch position

    Hello mates. i have an MK CU to replace. As you may know, the main switch in MKs is on the left hand side. There's no way to replace the meter tails. Is there another manufacturer that has a left-hand main switch CU, or a flexible position option? Thanks muchly!
  15. electrical mt

    Main incomer tripping

    I was called in a block of office saying they have a problem with the main incomer. During the night nit all nights randomly the main switch in the switch gear is tripping. At night the offices are closed only the survers are running. Has anyone encountered this problem? Or what test you suggest?
  16. cliffed

    Zs on ring main high

    NICEIC visit the other day… pulled up on length of RM circuit …. Zs 1.30 ohms… RCBO 32amp B type…thoughts on this
  17. R

    What does the main fuse protect?

    From another thread: I'm thinking about this and it's got me all confuzzled. Don't fuses protect anything downstream ie my laptop's charger has a fuse that protects the charger cable, the socket has a breaker that protects its wiring, the boards wiring has a main fuse that protects it from...
  18. Mark Wright

    Main Eearthing Conductor - Fabric ????

    See picture below the Main Earthing Conductor is some kind of Fabric?
  19. jaytee69

    Sub panel wiring directly to main panel

    I live in las vegas nevada. I'm installing a sub panel outside that will be a 125 amps.I want to run the right wire from my sub panel to my main panel.My question is do I have to put a 125 Amp circuit breaker in the main panel and run the wiring to that. Or can I run the wiring from the sub...
  20. cliffed

    Main switch & Rcbo’s

    Special location a Static caravan TT System, CU fitted Main Switch then RCBO’s any comments

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