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size

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  1. 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...
  2. 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?
  3. 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...
  4. 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 --
  5. 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...
  6. 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...
  7. K

    What size cable is this?

    Can anyone tell by just looking what size cable this is ? It’s not written on the grey outer armour
  8. T

    How to work out the total design load to find my swa cable size

    Hi all I am having trouble trying to work out the total load and swa cable size. I have 10 circuits in a outhouse 40 meters from the mains power supply 1 x lighting with 10 lights, 1 x lighting with 10 lights. 1 x 2.5mm radial for 2 heaters, 1 x 2.5mm radial for heater. 3 x 2.5mm socket rings...
  9. M

    Armoured cable size

    Hi, having a granny a erected in my garden and doing a lot of the the work myself. Looking to run a armoured cable feed into the anex so it's already for electrician to eventually wire up my question is as follows. Works out as 25m run I'll need from where sse feed in is to fuse box location...
  10. T

    Size bush and lock ring

    Can anyone tell me what size bush and lock ring you need for 4 25mm tails and 16mm G/Y? For a snug fit Or is there a 3phase tail gland out there?
  11. J

    Cable size

    Hi, Looking for advice, Doing a new build in a rural location and I’m having to run a mains electricity 500m to the nearest meter. Had a couple of quotes so far but there vary massively in price. The first quote the electrician was going to use 16mm cable which even I thought would be too...
  12. HappyHippyDad

    Cable size and how to earth this system?

    Morning.... I have a friend of a friend who is just looking for some advice regarding his 12V solar set up. It's a metal shed approx 5m x 3m. My 2 questions are: 1. Does the cable joining each of the 5 batteries have to be 50mm as well as the cable from battery to 3kW inverter? I'm sure it...
  13. B

    Back box size for sockets

    Afternoon one and all, Just wondering if anyone has any experience with fitting chrome 2 gang sockets to 25mm back boxes. I bought a pack of 5 LAP chrome double sockets from screwfix but noticed that the listing online says a 35mm back box is required. I have measured mine and they are only...
  14. Q

    Eicr sample size question

    Good afternoon Was just wondering when a sample size is set for an EICR Say 50% would the remaining circuits have to be identified for schedule purposes. I'm training to becoming an electrician and it's something that I'm unsure about. Thanks Harry
  15. B

    Cable size for spur socket

    Hi all, I have a spur socket on the upstairs landing from a ring socket in an adjacent bedroom. It is connected in 2.5mm T&E ; is this okay or should it be 4mm due to it being a double outlet hence it could supply 26A? It currently has only a decorative LED tree thing plugged in. The cable...
  16. B

    Testing pyro 2L2.5 cpc size

    When testing 2L2.5 & 2L4 pyro what size should be recorded for the cpc when using the outer sheath?
  17. C

    Bus duct - Earth cable Size

    Bus duct is used to transmit the power from the secondary of the transformer to the Main distribution board? If the cable is used instead of bus duct, we would size the ground cable approximately half the cross section area of the power cables according BS 7671 table. 54.7 If this is a bus...
  18. C

    Calculating Earth Size

    Hello All, Just a quick one. We look after a factory that has a 250amp busbar running around the factory. We have a machine plugged in with a 70mm 4 core swa and the ZS reading is too high so we are going to run in a separate earth to help, how would we determine the size needed to run in? Thanks.
  19. N

    Caravan site, cable size

    I am pricing a job to wire 21 new pitches for a caravan park. There will be a meter box beside each caravan with a 16a trip. I will split it into the 3 phases, so 7 caravans per phase. Im just trying to figure out how to calculate the cable size. Is it better to run a ring main to pick up 7...
  20. V

    ring circuit for a submain?

    trying to find answers in the reg book, but is there anything to say you can't install say a larger ring circuit for a sub main? to reduce volt drop / cable size etc. Normally you would obviously install a large enough cable, but would this be acceptable , whats our thoughts?

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