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  1. M

    Appendix 4 (reference method)

    Cheers :)
  2. M

    Appendix 4 (reference method)

    Can somebody help with this please. Flat twin and earth clipped to masonry but covered with plaster. What reference method would this fall under?
  3. M

    New Zealand mechanical protection ?

    no my boss isnt bothered as long as it works :/
  4. M

    New Zealand mechanical protection ?

    ill get some pictures up monday night , and its poduction engineering enviroment , lots of hammering and cutting tools used
  5. M

    New Zealand mechanical protection ?

    Yes deffinitely likely to be damaged , its been clipped to a table where people work. No my workplace doesnt have inhouse sparks. my boss is aware im doing an electrical course outside of work and prior to the install he apporched me and asked for my opinion. I told him id do a new circuit from...
  6. M

    New Zealand mechanical protection ?

    no i actually asked the bloke installing it what type of cable it were , he just said flex. I then asked didnt it need to be mechanically protected and he said no its rcd protected. Im only still learning but i always thought if something was clipped direct it needed some degree of protection...
  7. M

    New Zealand mechanical protection ?

    This might come across as a stupid question but im only a trainee and still learning. Do you need to mechanicly protect cable clipped direct in a commercial building but its protected by 30ma RCD, the cable is flex and the circuits that have been installed are fixed power outlets on 13a plug ...
  8. M

    CI...... corection factors for thermal insulation

    Hi could sombody please help, im currently coving cable calculations and volt drop. I understand the process and how to determine csa but could sombody please help me out as to where there is a table in bs 7671 ci to size of insulation. I found this table on line and just wondering if theres...
  9. M

    Diversity ?

    no sorry i think i follow first 10a of full load current =10A =44.35 +30% of remaining = 44.35 x 30% =13.35 +5a for socket outlet = 5A TOTAL = 28.3 from the first 10a i took off i then add on and then add 5 for the socket so it goes...
  10. M

    Diversity ?

    i might just be missing somthing really obvious but please could some one explain it step by step in a very simplified was as it appears im very simple today -_-
  11. M

    Diversity ?

    i understand the 30%of the remainder is 13.3 , but what do i do to get 28.3 its not plus 5 because itll be 18.3. it is just this last bit im confused with
  12. M

    Diversity ?

    i understan it alll up un till the +5a how do i go from 13.3a to 28.3 ????????????
  13. M

    Diversity ?

    Hi can sombody please shed some light on this for me i cant get my head round the process ? this is the equation i've been given a 230v 12.5kw domestic cooker maximum demand current I=p/v =12500/230=54.35 i understand that bit but its this bit i dont get applying diversitiy first 10a of...
  14. M

    comercial board change

    Im only a student but isnt that classed as a TN-S supply and you can use it for new installs ?
  15. M

    Prospective fault current ?

    I have read a few articles and i have researched pfc online and i have come across prospective earth fault current and prospective short circuit current but just never 2 and 2 together with the acronyms, cheers for the help trev
  16. M

    Prospective fault current ?

    Thanks for the help very imformative and easily understandable
  17. M

    Prospective fault current ?

    Thanks telectrix also what does PEFC and PSCC ? Sorry if thats a stupid question
  18. M

    Prospective fault current ?

    Can somebody please clear up for me what is prospective fault current? Am i right in thinking its the value of overcurrent you get through fault conditions like short circuits and live conductors and exposed conductive parts ? Thanks
  19. M

    Electrical tests

    Haha i can tell by your comment (smell) i take it you ment spell :)
  20. M

    Electrical tests

    Thanks for the help, ive been out and bought guidance note 3,very helpful. sorry for the bad grammer and spelling, it were typed via phone (small keys)

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