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  1. C

    Isolation and switching

    I have a question regarding isolation and switching arrangements. I want to work out what would work best within the regulations regarding splitting a new 200a TPN PME supply to serve flats above and a shop below. my initial thinking new 200a PME supply - Trunking above feeding a new ryefield...
  2. C

    Supply from a PME service head

    i have been asked to quote for a new supply to x4 new build flats and a commercial unit below, i am not to keen on supplying remote buildings from a PME and i am really conflicted about how i choose the earthing conductor and bonding conductor sizes so can anyone help. New service head located...
  3. C

    Working out loadings

    if a client says they have a 3 phase appliance that is rated at 7kw. To choose the correct commando socket size is the correct calculation to work out the size of the commando socket simply divide the 7k by 3 which will give me roughly the line current assuming it’s a ballanced Laod?
  4. C

    how much total load in KVA

    A client wants five new commando sockets, seeing as you cannot apply any diversity to the commando sockets would i be correct in saying the below will need to assume a maximum consumption of 96a from a 3 phase supply, so as a bare minimum the power supply specific to these circuits would need to...
  5. C

    Appliance tripped MCB after....

    Carried out an eicr and noticed x2 double sockets have reverse polarity that supply a frying machine at high level. (this was a return visit to correct the faults) After correcting the reverse polarity on the two sockets i plugged the fryer back in and the circuit MCB tripped out and the...
  6. C

    reverse polarity on appliance socket

    Sorry this was a return visit to correct the faults found
  7. C

    reverse polarity on appliance socket

    Without the fryer plugged in the MCB stays on, i checked the plug top and it was fine.
  8. C

    reverse polarity on appliance socket

    I cannot open the fryer up as its fixed into a unit
  9. C

    reverse polarity on appliance socket

    as soon as i switched the socket on with the fryer switched off it tripped.
  10. C

    reverse polarity on appliance socket

    Ow yes the MCB tripped
  11. C

    reverse polarity on appliance socket

    Carried out an eicr and noticed x2 double sockets have reverse polarity that supply a frying machine at high level. After correcting the reverse polarity on the two sockets i plugged the fryer back in and the circuit MCB tripped out and the appliance popped. I am unable to open the fryer up as...
  12. C

    fuse board change to 18th edition

    Not been on the 18th edition yet but would like to know from anyone who has the below: In simple terms when carrying out a fuse board change over what would NEED to be done that i would not have done under 17th AMD 3 regulations with the new 18th edition regulations now being in force.
  13. C

    Maximum demand question

    Of corse wilko thank you. Gabarron MAC15 I am thinking about asking a heating engineer to dial them all down to 3kw and see if they even work, that’s the only way I would feel comfortable
  14. C

    Maximum demand question

    I am going by MCB with the exception of the boiler circuit as each boiler is 15kw on a 63a breaker.
  15. C

    Maximum demand question

    A client contact me as they are getting the supply upgraded to a block of flats and UKPN need a figure adjusted for diversity for each flat. The original contact didn’t give a crap about the supply capacity. x6 flats have been refurbished and during this process x6 15kw electric boilers for...
  16. C

    18th edition question

    Not been on the 18th edition course yet. In short what are the design changes I will need to implement come jan 1st on a domestic re-wire?
  17. C

    Fuse board in kitchen EICR

    well 18th edition has this mixing MCBs as a big no no apparently, but i know EATON acquired BILL and DELTA so same family really.
  18. C

    Fuse board in kitchen EICR

    how about mixing manufacturers mcb's i am not too concerned as eaton bought out BILL and the shell casings to the MCBs are exactly the same.
  19. C

    Fuse board in kitchen EICR

    commercial kitchen, DB installed 1974
  20. C

    Fuse board in kitchen EICR

    Correct operation of safety devices through ADS, with them covered in grease they look like they could seize up some how? not sure maybe just a clean up with some sort of contact cleaner?

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