size

  1. S

    Cable size changes over distance

    I’m intrigued by cable size calculations for my garden. The distance from my consumer unit at the front of the house to the garden is 14m (20m cable route). Garden is 34m long to the front of a shed. There will be other sockets, lighting, irrigation control used in the garden as well. I am...
  2. K

    What size Gen do I really need?

    Hi, so I’m shopping for a home standby generator. I know the real answer is to get the actual data plate information however i just want to know without doing all of that what to believe. Last year when the power went out for a couple of days I hardwired a 6000kw running watt generator to my...
  3. U

    UK Need help with cable size and breaker size

    I’m still an apprentice electrician so the whole thing around diversity is still a bit confusing to me A family member has moved into a new flat. The existing cooker circuit is 6mm on a 32A MCB. She has bought a cooker which pulls 9.6Kw. I know you do 9600/230 = 41.7 This is telling me that...
  4. B

    Need help choosing correct size main breaker for existing subpanel

    DIY homeowner here. I need advice, but will hire a pro if major rewiring needs to be done. I purchased a home with a 200amp service. There is a detached garage about 15’ from the house. I dont think the subpanel in the garage was wired correctly. There are currently three 4awg aluminum branch...
    • bartleyhs
    • Thread
    • breaker correct existing help main main breaker need help screwfix size subpanel
    • Replies: 9
    • Forum: UK Electrical Forum
  5. S

    What size amp do I need?

    Hi all, I bought a baby monitor which came with a 2 pin power adapter so I would need to buy a 3 pin adapter but unsure of which size fuse I would need to use. Can someone look at the picture attached to help me determine what amp size my fuse should be. Can someone also tell me how I go...
  6. R

    Formal Calculation of RCD Size.

    I have had a good search for this information but can't find it anywhere not even in my on site guide 17th edition. So imagine you have a CU with 10 MCBs but no RCDs. You decide you want to install an RCD. You do your max load and diversity calculations for each MCB circuit and you come out...
  7. M

    Downgrading cable size

    Hi guys I was doing a kitchen recently and behind the cooker hood I had ran 2.5mm from a FCU, the hood can with 1.5mm flex. I had put a plug top with a 3amp fuse onto the flex and then a single socket for the 2.5. That way you just plug it in. The kitchen fitter got all assy and said that his...
  8. B

    Cable size and fuse selection

    Hi, looking for some advice on this, 3 phase board 25 SWA incoming feed from 60A BS88 fuses, looks like someone’s replaced the 100A main switch with a 125A 4 pole RCD is there anything wrong with that? I know 25 SWA can’t take 125A and overcurrent is 60A fuses, I never understood why haha Thanks
  9. G

    Cooker connection unit to hob cable size

    Hi all, I have just been to a job where the existing hob is wired in using 2.5mm heat resistant cable, the hob is rated at 6000w. I calculate this to need a 4mm cable, however, was challenged by someone, in the end I called NICEIC who stayed neutral and said it "might be ok, what do the...
  10. D

    Armoured cable size

    Hi I am having my garden landscaped and using the opportunity to put services in a trench in preparation for a garden studio/office build in the summer.May put a shower and water heater in as well.Approx 55 meters from house fuse board to office location. What size of armoured cable should I use ?
  11. P

    Volt drop calculation and cable size

    Hi A good friend of mine is having a large electrical installation carried out in his garden.Hes had 3 prices from various electrical contractors regrading the install. He is having a summer house built that will house 9kw 3 phase sauna 5kw hot tub 27kw 3 phase electric boiler A 32 amp ring...
  12. J

    What size dc isolator needed

    Just a quick question. We have a yard with no electric up there so using a 12v car battery connected to an invertor to power 230v lights. I'm wanting to connect a dc isolator from the battery to inverter so we don't have to keep connecting the clips to the battery and can use turn the isolator...
  13. K

    UK Unsure SWA cable size I have?

    Hi guys, hopefully somebody can help. I have some driveway lamp posts with the armoured cable installed though the middle of the concrete pad. Unfortunately whoever installed this did a rubbish job as the concrete is not level and the posts look awful. I was going to cut the cable and dig out...
  14. F

    Junction boxes size

    Good morning, i'm trying to find information about how to calculate junction boxes sizing by uk regulations. Can anyone help, please? Best regards
  15. R

    what size of Armoured cable

    Hi to all first please may I point out that I am an avid DIY person but know my limits. I would like to know from all you very experienced people out there what size of Armoured cable to use to put power to my steel container, i am in the process of turning it into a work space and a Sauna I...
  16. T

    Earth size for TT

    Got chatting to another electrician today who said about using 16mm earth for TT. Not that i have ever had to put steak in but am i right in saying its 10mm for a TT system?
  17. HappyHippyDad

    Realistic cable size for voltage drop

    My customer currently has a shed at the bottom of his garden. The shed is approx 70m from the house as it is a huge garden. The shed has electrics going to it. They are from another shed 20m away on a 1.5mm cable. This shed is from a spur off a socket in the house on a 13A FCU. It is 2.5mm. So...
  18. static zap

    Our File attachment Size /Quota ,any tips?

    Server upset with a 3.6M piccy . But allowed a 620k .png screenshot. .. Some new limits seem to be in place . A little guidance of what you consider sensible please? Any help will be much appreciated. -- Change needs remembering... Zoom in digitally -to lower my Mega pixels --
  19. S

    Questionable Conductor Size

    I am in the process of installing a 5 core 70mm feeder cable for a DB. 70mm cable lugs are too large for the cores but 50mm fit perfectly. I have taken this up with the cable supplier. Their response was that 50mm lugs are often used om 70mm cores? Having been in the trade for 41 years I have...
  20. lozarus

    Interesting Cable Size?

    Apologies if this is a bit "sad", or if it's easily answered! Whilst going about my business I happened across this old reel of RS flex - labelled as "0.15mm SQ 3 Core White". Obviously far below the minimum accepted size for appliance flex of 0.5mmsq. A part of me thought it may be for...
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