25mm

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  1. K

    Taking 25mm tails over 3 metres

    Hi all, This week while wiring a very old farmhouse for heaters I noticed the incoming cu tails were very long, around 20 metres from the fuse and meter which is located in an adjacent farm building to the house.25mm tails (double insulated) leave the meter and go into a kmf switch (sorry I...
  2. N

    Max volt drop for 25mm or 35mm feed to sub CU

    How does max volt drop for 25mm or 35mm feeds to sub CU work. Do we for example allow only 1% drop on the 25/35mm so we can keep 2% drop for lighting circuits and 4% for power circuits, or is there any where else in the regs that gives specific figures on maximum allowed volt drop? Any...
  3. G

    Splitting 25mm meter tails to SWA and 25mm tails

    Hi All, I need to split the meter tails to supply a second CU which will be at the rear of the house, however the supply to the second CU will need to be in SWA and I can only split the tails at the meter cupboard. Is there a suitable adaptable box or isolator I could use to be able to do...
  4. OnlQQker

    UK Why Are Incoming Live/Neutral 16mm and Tails From Consumer Unit 25mm

    I just can't seem to understand this and can't find a clear reason behind it either. I asked a chap on the DNO once and he didn't know either. Anyone?
  5. R

    25mm Knockout Metal Clad Boxes.

    I’m looking for some metal clad sockets. But I need 25mm knockouts. Does anyone know any surface mounted metal clad sockets that have them? MK do some nice ones but they are only 20mm knockouts.
  6. westward10

    25mm to 16mm splice.

    Sure I have seen these but do 25mm to 16mm copper butt spices exist to joint 25mm to 16mm?
  7. D

    Joining 16 or 25mm Earth Cable

    Hi any recomendations for products which I can use to join Two 16mm Earth cables. Going in a Fairly inaccesable place so trying to avoid Screw based products. Need to move an bonding cable for Copper pipe as boiler been relocated
    • Deleted member 14631
    • Thread
    • 25mm cable earth joining
    • Replies: 8
    • Forum: UK Electrical Forum
  8. B

    25mm split con sub main eicr code?

    Just done an EICR on a domestic, the sub main running from origin to cu is 25mm split con. Hard to know if its more than 50mm deep in walls etc without intrusive investigation. So could run with FI, but obv that doesn't deliver a satisfactory report. Bit of a tricky one as it would have complied...
  9. P

    Reference method / routing guidance for cable on a wall with 25mm Celotex

    I wonder if anyone could assist with this query please ? I am a newbie, so any guidance or alternatives would be greatly appreciated. I need to run a ring final partly against a wall with internal 25mm Celotex type insulation. The additional Celotex being needed due to reduced cavity...
    • PAUL BERRY
    • Thread
    • 25mm cable guidance method reference routing wall
    • Replies: 6
    • Forum: UK Electrical Forum
  10. D

    25mm Flexicon Coupler

    hi all I’m after some 25mm flexicon couplers to join my already bought 10m lengths of 25mm flexicon conduit. This is one of those cases where I should have done more research before buying... I cannot find a coupler to join 2 pieces of 25mm flexicon anywhere! Flexicon won’t sell to me direct and...
  11. T

    Joining 25mm SWA - two options?

    I was having a debate with my spark today about methods of joining above ground 3 core (E,L,N) 25mm SWA cable. We need to move the consumer unit and with it the meter tails (fused to 80A). This requires an extension of the tails as it is not possible to completely re-run them. He said that the...
  12. C

    Armoured cable 16mm or 25mm

    I am not an electrician. Can anyone help please? I have an outbuilding which I am converting into two offices. The building is currently served by a 16mm armoured cable running underground from my house, the distance is about 100 metres. Potentially the building could have a maximum of the...
  13. R

    25mm galv conduit deta brand from tlc keeps bending with a flat back and wrinkles ?

    Iv used this bender for allot of 20mm galv jobs and its worked fine. Im currently doing a job that involves 25mm galv conduit so iv changed the former and steppes up the roller and arm into the appropriate holes. Every bend i do the conduit keeps showing small wrinkles at the start of the bend...
  14. R

    35mm 1G flush backbox with some 25mm knockouts

    Hi. I'm looking for a few 35mm 1G metal backboxes that have some 25mm knockouts on them. I've had them in the past (Rexton brand ones) from Tradesparky I think, but Tradesparky can no longer source them. None of the sites for boxes specify the sizes of knockouts so it's difficult to tell. I...
  15. Gavin John Hyde

    25mm Aluminium SWA in domestic setting!

    Was asked to quote for a job today wiring up a summerhouse/playhouse in a garden to run the usual sockets, lights and garden tools etc... When on the job the guy who is a scrap dealer/collector points to a roll of 25mm Aluminium 4 core SWA and says can you use that to run down to the summer...
  16. H

    Best way to bend 25mm PVC conduit?

    From time to time, I have a need to put a fairly gentle bend into 25mm PVC conduit. Past attempts to do this using nothing but a bending spring (originally bought for 22mm copper pipe) were not successful. I found that I could do the job if I warmed up the conduit with a heat gun, but have never...
  17. S

    CSA and resistance of 20 & 25mm Steel Conduit

    Can anyone point me in the right direction to find out the CSA and resistance of 20 & 25mm steel conduit? It's for part of my 2396 project where I'm using the conduit as CPC, I'm happy enough with the calculations I just need some numbers to work with. I've tried various manufacturers websites...
  18. A

    For Sale Hilmor formers 25mm and 1 1/4"

    I have a 25mm and a 1 1/4" hilmor branded former for sale. Looking for £25 each plus whatever the postage is. Thought I would try them here before eBay.
  19. M

    25mm armoured to 16mm earth conductor

    i have to send a 75meter run of a 3 core 25mm armoured from the meter to the fuse board. now due to the lenth i have to have a switched fuse and possibly a isolator on the otherside. due to the earth being 25mm i know alot of isolators only take 16mm. is the use of a helely block perfered to...
  20. P

    25mm SWA for sale Glasgow

    Hi, I've got a 20m drum of 25mm 3 core SWA for sale. Bought for a job but now not needed. Bought for £95 will sell for £60, Glasgow area.

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