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  1. J

    TT supply with TNS sub mains

    Would like your opinions on the following setup. 300A 3 phase TT incoming supply feeding 15 units with 50A TNS obviously some link somewhere between Neutral and earth but haven't found it yet. I would think that each unit should be TT not TNS thoughts please
  2. L

    Connecting 2 12v fans

    Hello, I need some help with this: I have a Xbox one S where I connected 2 Fans (there is usually just 1 ) parallel to the 12v sourve from the motherboard. Fan 1 has 22mA and Fan 2 has 29mA. My Question now is, if there is any risk to burn something. I dont know how much amp is delivered by...
  3. GBDamo

    Intermittent fault finding.

    Was called to a commercial lighting issue on Friday where the circuit had tripped, RCBO protected. On arrival reset the RCBO and all held, three lights weren't working, two were lamps and one had a black scorched ballast, replaced this and all works. The circuit has eight lights, two PIRs a...
  4. T

    Voltage dropped

    So after what I thought was a productive day yesterday replacing old lights with LED panels, 3 of them weren't working. Turns out the voltage between line and neutral was about 210 at each of the 3 points, 245 between line and cpc. Voltage was 245 between line and neutral at all other points on...
  5. S

    DOL Starter / automatic dust extraction system

    Could I use a DOL Starter circuit to create an automatic extraction system? I was thinking that I could replace the start button and simply wire in a socket instead. So hypothetically if I plugged in and switched on an electric palm sander, it would start up my dust extraction systems (via the...
  6. T

    New DB (additional)

    Hi all, Apologies it's been a while since I was last here, hope you are all well. One of my summer jobs is to move a computer room, and it's going to require an additional 3 circuits to power the computers. The board nearest this room has an old 3-phase memshield 1 board that is at capacity...
  7. J

    EXOR intelligent lighting Box

    This might be daft but i am currently doing remedial work on a commercial site and there are lights being served from a EXOR lighting box. Undertaking a continuity R1 and R2 at the incoming on the box i have continuity but at the light fittings nothing, i have changed the plug and the flex still...
  8. Zdb

    Air Conditioning and Refrigeration Industry Board (ACRIB)

    Anyone else have to hold one of these cards in order to purchase fluorinated gases? It would be nice if the ECS/JIB card could incorporate the F-gas qualification so I dont have to renew and pay for 2 separate cards and 2 separate health and safety tests.:cry:
  9. Ashley-Joseph

    First day as a mate

    So tomorrow I have managed to find work as a mate installing conduit and cable trays. This is my first time other than collage working as a mate and I am nervous as I have never installed conduit on big buildings any advice would be helpful also I was told to take basic hand tools any advice on...
  10. T

    Can anyone recommend a tender company ?

    Hi can anyone recommend a Glasgow or Scotland company that will price commercial tenders for me. I don't have the time to spend pricing larger jobs. Thanks
  11. E

    Electrical Zones

    Hi, I am in a debate with a friend who is also an electrician who is backed by his boss in this. Now I am aware of all the electrical zones like - 150mm from a ceiling and 150mm from the corner of 2 adjoining walls or partitions and horizontal or vertical from any accessory or switch gear. But...

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