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size

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  1. A

    Cable Size to feed consumer Unit

    Hi, I have a number of light industrial units on one site, one unit is very large and difficult to let, so we have split it and created a smaller 2500 sq ft unit. We now need to run a new supply to it and fit a new consumer unit, we normally fit 3 phase boards with room for a 16 amp and 32 amp...
  2. A

    Cooker supply 12kw correct cable size

    Hey guys I’ve run a 6mm for a cooker, runs about 10metres. The customers has changed her mind on the cooker and gone for a 12kw range. Went back today to finish off and saw this lovely surprise. I know you have to take diversity into account. But for my peace of mind. Would 6mm 32a MCB be fine...
  3. A

    Forum theme/font size too large

    Is there a way to change the font size on this forum? Thread text seems unnecessarily large - Something more like the browser default text would be better
  4. D

    Power to outbuilding- Consequences of extraneous-conductive-parts on choice of SWA size

    I realise this is a much-discussed topic, I have certainly read a lot on the forums already! However I wish to ask about the subtitles of earthling the outbuilding and the cost/practicality consequences. The outbuilding (a DIY’s workshop) will have one socket ring and two lighting radials. I...
  5. R

    315a cut out, what size tails

    I'm looking at a job for a friend and wpd is upgrading his cut out and wants us to upgrade his whole install. my question is from the new 315a fuses wpd is putting in what size cable would i require to the panel board literally decide it. I've has a look on like and uk power networks suggest...
  6. L

    Cable size issue with size of shower

    Hello Looking for some guidance please. Lived in current house just over a year now and had couple issues with our pull cord switch (45A) sticking. Also at its worst, experienced the neutral burnt out. My relative (industrial electrician) has put some potential issues across to me so was...
  7. L

    Voltage drop and cable size calculations.

    Hi, would like ta post a question about voltage drop in a cable. If I have a 230v single phase load of 500w with a 50 meter cable run reference method C . What would be the voltage drop in a 1.5mm2 ? From my calculations excluding pf I checked from the table the the voltage drop in mV/A/m of a...
  8. G

    Breaker size for Double Oven.

    Your comments appreciated please: New Neff Double Oven - 28A total load. Oven tail 4mm 3c butyl HO7 35A rated. Feed 6mm T&E, to a 40A oven switch with 13A socket. Circuit breaker - 40A or 32A ? thanks, John.
  9. bigspark17

    Submain swa size check

    Just after a bit of advice from thoose of you that deal with this regularly & want to make sure i get it right. Swa submain to phone network mast 63Amp single phase supply Pme supply assumed ze of 0.35 245M run Ive been trying to calculate which size swa & cpc or 3c swa to go for, would like...
  10. D

    25kv generator cable size ???

    can anybody tell me what size sy cable I need for a 25kv 3 phase temp generator please to power a 3 phase machine lathe
  11. S

    CPC size of SWA Armouring

    Evening, Just joined upto this forum after a search online for some info, hopefully someone can help me? I have taken over a job from another contractor who has run in a 50mm 4 core swa from a substation to a TP&N DB roughly 100m away. My concern is that it appears they have not run a separate...
  12. J

    Cable size and protection - calculation

    If possible could anyone have a quick look over these steps I've made myself for cable sizing and the protection needed. Please let me know if I've missed out anything. I also couldn't find a definitive answer for maximum permitted voltage drop percentage for 3 phase. I think it was 5% and 8%...
  13. J

    Calculating cable size - start to finish

    Hello everyone, I would like it if anyone would be able to help me in listing the steps For choosing cable size. Starting from protective device from a boards 'Zs' value, all the way to the cable size. Thanks in advance
  14. S

    Maximum breaker size for DB (solar PV)

    Hi, Can anyone point me in the direction of the regulation / code for the max solar MCB size when connecting into a spare way of a local distribution board ? Eg. Is it possible to connect a 100A breaker into a 100A board ?

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