concentric

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  1. P

    Cable termination of concentric cable

    Background: I am not an electrician, I am a retired professional engineer high power broadcast transmitter design , but am dabbling outside my sphere of knowledge, so help please. It is along time since I have looked at the 16th edition. I am not in paid work but am helping a friend who is a...
  2. S

    UK DNO Concentric cable current carrying capacity

    Had UKPN come out to a property recently to upgrade the main fuse from 60A to 100A but when they arrived they said that the supply cable which he confirmed is a 25sq.mm. CNE aluminium concentric cable (1-phase, burried) for the PME supply is only able to take a 80A fuse. They will have to dig...
  3. baldelectrician

    Split concentric after meter, queries

    Did an EICR that passed 5 years ago Several things in the picture raised concerns for me. Comments please - photo at end First photo shows a split concentric in use AFTER the meter, the supply is a TNC-S supply and the split concentric has the following items Single insulated neutral...
  4. S

    Failed EICR on concentric feed to DB

    Evening all, I found my first ever split concentric cable today. Running from an isolator up and into a flat. I was doing an EICR. I could not verify where the cable is within the fabric of the building. I failed the EICR on the grounds that the cable has no mechanical protection, no RCD...
  5. R

    Spilt concentric cable duel use

    Morning all, started a job yesterday fit a bathroom fan etc. When I took off consumer unit cover to do dead test I came across a split concentric cable supplying an outbuilding/shed in another Mcb. It was the type with the single insulated neutral and separate earth. What threw me was that...
  6. S

    Split concentric cable

    Can anyone tell me what table to use for CCA of split concentric in BS 7671?
  7. N

    Ok to use concentric cable as meter tails??

    Been asked to do an eicr on a flat above a shop. Tails are run in concentric cable from isolator switch by the meter, to the main switch in fuseboard. Never run into this before so not if this is still deemed acceptable or not? Any advice, reg numbers? Thanks in advance.
  8. D

    Concentric stranded cable????

    [ Has anyone come across this cable before .i havnt it looks like 10 1mm twisted together and the mains earth is 4 2.5mm.i was all set to fail it till my mate said it was consenteric is he right
  9. C

    Split Concentric Termination

    I'm no expert on split concentric (assuming that's what this is)......But an earth clamp doesn't seem the best solution to this (also as the earth cores appear to be insulated! This is for an eicr on a sub main but I'll have to do the remedial work at some stage. Any advice on how to...
    • catdog
    • Thread
    • concentric split termination
    • Replies: 26
    • Forum: UK Electrical Forum
  10. HappyHippyDad

    Cut out questions?

    Hello all.. I have 2 questions about the picture below. I carried out an EICR and you can see that part of the cover is missing near where the CPC enters the cut out enclosure. I realise that this is not in my remit to code, is it simply a matter of informing the DNO? Also, usually I see a...
  11. A

    6mm split concentric

    Hi, can anyone tell me the maximum current carrying capacity for 6mm split concentric? Beried underground in a duct Thanks
  12. O

    Strange SWA cable

    I've just moved into a 1960's house and when checking the supply to the detatched garage I came across a strange cable type that I at first thought was SWA. It's 10mm diameter with a black plastic sheath. There is one core of 7 strands with red pvc insulation, 7 strands individually insulated...
    • oldsparky99
    • Thread
    • cable concentric split strange supply swa
    • Replies: 14
    • Forum: UK Electrical Forum
  13. bigspark17

    Concentric cable used as submain?

    Situation DNO supply into garage outside meter box, submain into house approx 10M in concentric cable. Fused down by 80 swfcu . I dont know the size but it has 7 neutral strands and approx same cpc strands. Any thoughts on this.? Is it ok? I would have thought ok as same if not very similar to...
  14. B

    Type of DNO supply question

    I was installing a new control panel in a pumping station kiosk the other day. Sometimes I am required to `enter` the DNO supply to insert the earth cable on what is normally a TNCS system. To my surprise the supply was a single core with the armourings supplying the system earth but no neutral...
    • brenfox
    • Thread
    • cable concentric dno normally other question supply system type
    • Replies: 12
    • Forum: UK Electrical Forum
  15. P

    Single Core 230Volt Supply??

    A farmer client has a supply cable going underground from the DNO's kennel to a large barn converted to stables with power and light. The cable is fed from a 30 Amp switch fuse and a preceeding 30 mA RCD. In the barn, I noted that though the power and light were on separate 2.5mm and 1.5 mm...
    • Piratepete
    • Thread
    • cable concentric core earth installation single single core suitable supply volts
    • Replies: 20
    • Forum: UK Electrical Forum
  16. F

    Split Concentric as a submain

    Hi All, Having a little discussion with my old man over a job. The job is a domestic property, the CU is around 7 metres in cable length from the meter. There is a switch fuse around 4m from the meter, in a cellar. However, the tails are run very shoddily in an old bit of water pipe and then...
    • frontier219
    • Thread
    • concentric split submain
    • Replies: 54
    • Forum: UK Electrical Forum
  17. T

    concentric cable ???

    Hi all Just a quick question what is the bs name for concentric cable that the db use for tncs and what size do they usually use on a single house thanks
  18. D

    Single concentric cable use

    Hi guys. I am a new member to this site and boy do I have the need for some advice. recently got handed a job of upgrading a supply to a site from single phase to three phase. The site is a Mushroom Farm with many outbuildings. The existing wiring at the main incomer is atrocious. All sub...
  19. K

    Split concentric submains

    I am currently on a big flat development project (old high school being converted to 50 flats, plus a 3 phase landlord supply). I had planned on installing 25mm 3core SWA for all flat submains as the Flats are all Electric with no Gas. However, i am now considering installing 25mm or 35mm split...
    • kevben
    • Thread
    • cable concentric mains split times
    • Replies: 48
    • Forum: UK Electrical Forum
  20. W

    Current capcacity for split concentric cable

    have just had a new supply installed at a job im working supply cable in - 185mm aluminium TPN combined pen conductor split concentric cable main fuses are 315a bs88's supplied underground from transformer to building does anyone have info for current carrying capacity for concentric...

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