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  1. dlt27

    3 Phase supply calcs.

    Any help please..
  2. dlt27

    3 Phase supply calcs.

    I need to check. I know its square D, but unsure of model. I took max zs for 250A mccb off the website. Thanks
  3. dlt27

    3 Phase supply calcs.

    250A on tray on its own. 63A DB on tray on its own. 100A DB and compressor are buried in the ground in ducting then on tray together to final positions. Thanks
  4. dlt27

    3 Phase supply calcs.

    80m for 250A supply to new panel, From new panel -15m for 63A DB, 30m for compressor, and 30m for 100A DB. Ze =0.05 Thanks
  5. dlt27

    3 Phase supply calcs.

    Hi and thanks in advance, I have been asked to provide a new supply for a factory unit. They want supplies to welding bays, metal cutting saws etc. The only info I have been given is that they want a 250A(3 phase) supply from existing 600A panel (PME) to a sub...
  6. dlt27

    No overload protection.

    Thanks for replies..
  7. dlt27

    No overload protection.

    Just a quick question. What code for no overload protection. I know any live part to touch is code 1. Somebody as put rccb on shower and it hasn't got no overload protection apart from bullet fuse. Also fusewire bypassed. This is a landlords flat! I want to put code 1, but it only becomes...
  8. dlt27

    Strange Tripping

    Definately neutral to earth fault. I had exactly the same thing once. When under load the neutral to earth fault trips the RCD. It was a neutral trapped by a metal wall light. Whenever a load from a circuit was switched on it traveled through the neutral to earth fault (imbalance) and caused...
  9. dlt27

    PME Bonding help!

    Im going to take the Mrs to bed know, not my regs. book....
  10. dlt27

    PME Bonding help!

    Thank you for your helpful reply. Much appreciated..
  11. dlt27

    PME Bonding help!

    Yes I gathered that. What is the process to check if it's extraneous. Is it if its less than 23k ohms? Also if you get a reading of less than 0.05 ohms can you presume bonding is on even though you can't see bonding conductor. Thank you
  12. dlt27

    PME Bonding help!

    Earthing conductor is 16mm to kmf switch and cpc in 16mm T+E submain to flat db is 6mm.
  13. dlt27

    PME Bonding help!

    So do you recommend code 2 then? Thanks
  14. dlt27

    PME Bonding help!

    More experienced help needed please. Scenario is Mains intake and MET(PME) outside the building in cupboard with KMF's (80A fuse) feeding flats via 16mmT+E. 2 flats gas meters are in cupboard at mains with 10mm bonds. 1 flat has gas meter in flat with no 10mm bond. Also no 10mm bonds to water...
  15. dlt27

    EICR Help!

    Hi all, Any avice on the following would be appreciated. The buildng is a listed building that has been converted into 4 flats. All flats have KMF with 16mm t+e to each flat fed from cupboad outide bulding. Gas meters are in the cupboard as well.(PME system) 1 what I would like to know is does...
  16. dlt27

    Consumer unit as recommended by governing body

    Can anybody recommend exactly what they do.. Also i keep hearing about these tails glands that cost a lot of money . What is wrong with putting tails in trunking and using gromett strip in the knockout to taketails though?
  17. dlt27

    Consumer unit as recommended by governing body

    What estalished guidance exactly are you talking about or what do you recommend? Thanks. The organisation is NAPIT.
  18. dlt27

    Consumer unit as recommended by governing body

    Hi all, I phoned my governing body yesteday to ask the dreaded question about TT system with metal consumer unit. His reply was that a tails gland should be used with clamp for tails in board and a 100mA rcd as main switch to protect tails feeding 30mA rcd's. He also said a fire resistant...
  19. dlt27

    Amendment 3 certification

    Hello, Could somebody explain why new regs ie non combustable dbs etc. doesn't come in until January and yet Napit have told me to use amendment 3 forms now. I designed an installation 6 months ago and so was really working to old regs, however I have been told to use new forms. As it happens I...
  20. dlt27

    Non combustible cable supports in escape routes.

    Firemen could still be in there though!

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