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concrete

  1. Aaronj46

    securing cables to mesh concreted ceiling in apartments

    Good afternoon ladies and gents, when I install cables as per the title I put plugs and plastic pegs into the ceiling as remember being told years ago you cannot cable tie directly to the mesh? any guidance/ reg references wuld be greatly appreciated. Cheers
  2. EalingBadger

    Opinions on the best diamond discs for cutting concrete

    I need to cut several tens of metres of 100mm x 100mm channels in hard (it's a C40 mix) concrete. Some of these channels will be for electrical services, some for other services (mainly MDPE water pipes) and some cuts will simply be to assist in tidying up a bit of a scruffy concrete pour. I...
  3. Soulcraft Electric

    Concrete (or similar) ducting to negate 750mm dig

    I've been asked to install an additional garden lighting bollard to an entrance drive. All block paving and decorative borders so I'm keen to avoid embarking on a digging exercise and the customer isn't keen either ;-). Any suggestions for suitable alternatives? Concrete cable trough, etc. etc...
  4. robd

    Precast concrete garage

    Hi all, A bit off topic but I am looking at getting a precast concrete garage at mine and wondered if anyone else had one or any thoughts on them? Was going to brick build one but think it's too expensive for what I need it for. Thanks in advance
  5. N

    Cables under concrete base or under screed?

    The floor of the kitchen will be filled up with: 1) Concrete, on top of which will go 2) insulation with pipework for wet underfloor heating system, on top of which will go 3) screed. Can the armoured cable run under the concrete base or does it always need to go above concrete base and under...
  6. M

    Anyone use a concrete nailer?

    have been thinking of getting one of these, as things like fitting capping, conduit etc would be much easier/faster. I dont really know much about these, and am yet to find anyone else with one to try, so wondering if anyone has one, and what are they like? Do they consistantly bury the nail...
  7. B

    1st flats with concrete ceilings

    Looking at a job first fixing flats with concrete ceillings, to be lined with mf ceilling system. How do you guys support cables in this scenario? Just clip up to concrete, or some more elaborate solution? Tray seems kind of ott, but would be a good solution. Cheers
  8. MFS Electrical

    Soffit lights, only problem is soffit is concrete

    So was round giving a quote to install soffit lights on a house today no problem some nice IP rated downlights will do I thought, went round to see the job and to give a price and noticed the soffit is in fact made of concreteo_O anyone got any ideas of a fitting to use that won’t look daft? Saw...
  9. J

    casting down-lights into concrete (new build)

    Looking at a job tomorrow evening for a new 5 bed house +granny flat over a basement floor+ground. In my initial phone call to the client- down-lights are wanted in the basement concrete ceiling 'which will need to fit cowlings we've already cast into concrete' I am assuming they are...
  10. L

    Medium size shop. Full concrete construction etc .Basement with 2 fire exits.Fire /smoke alarms?

    As title ! Single entry ground front door. twin stairs to basement . Each side of basement (It was knocked into one years ago) has its own fire escape etc . what would be the Basic level of Fire/smoke detection equipment that"should be required" for each of the 2 floors ? Thanks
  11. T

    data cable buried direct in concrete

    I've been asked to look at a job (total shambles) they've given the other sparky the boot because of his poor workmanship. I've honestly never seen work so bad. one of the main issues is a load of floor boxes have been chased in, the data cabling has been buried direct in concrete, is there any...
  12. Pete999

    Pete's Videos Now that's how to drill a hole in concrete

    http://www.electricalsafetyfirst.org.uk/mediafile/100423440/Best-Practice-Guide-1-Issue-3-.pdf
  13. R

    Swa in warehouse chased into concrete floor

    Hi, Had a look at a job today and there is an swa swinging from one side of the warehouse to the other providing power to machinery. They have had another electrician quote to chase the swa into the concrete base. I can't see how he can chase any deeper than enough to cover the swa. Where...
  14. Soulsurfer

    underfloor mats for carpet and under vinyl strip in ensuite?

    Hey all, looking into what I need to fit underfloor heat mats to an ensuite bathroom which is having some kind of vinyl strip flooring laid on top apparently with of course self levelling compound first on top of mat. Is Wedi board alright for under the mat insulation or use proper uf heat made...
  15. S

    Cable Duct install in Cement Bound Sand (CBS)

    Hi Has anyone had any experience of excavating to find HV underground cables in CBS backfill? I am being asked increasingly to use CBS (usually about 1:14 Cement/sand) for bedding and cover infill of cable ducts we install. Reason usually given is that apparently it helps with heat dissipation...
  16. L

    Underground HV cable & Communication separation distance

    Hi, Is anyone can suggest me, what is the separation distance between underground HV cable and Communication cable? An existing communication duct is found across the new HV cable route whilst new trench is dug for HV cable laying. Is there any reference or literature that mention about the...
  17. T

    Best automatic centre punch

    I am looking to get a decent auto punch. Have seen them costing over a £100 but aint gonna pay that. Just want something that really works. Any recommendations out there? I have bought a few of the £6-7 priced ones and they lose their punch randomly which is really annoying. I use it for marking...
  18. podmore78

    Stud Detector recommendation

    Hi Guys My colleague and I are currently looking to purchase a new stud detector but at the moment are struggling to find one that will detect stud, and cables through plaster skim and concrete. Could anyone help with recommending a detector they use that will pick up stud, conduit and cables...
  19. Z

    Shed CU install for registration assessment, catenary wire question

    I've got my registration assessment with Elecsa coming up soon so I don't want to be making any mistakes that'll be pulled up. Decided to go with a CU install at my my house in the shed, as it's something I've been meaning to do anyway, and it gives me time to make sure everything is 100% spot...
  20. Dizzy_Maskell

    Dewalt Wall Dogs

    Anyone used them pro con etc ?
  21. S

    Book times for chopping boxes in walls

    Evening, Anyone know the book/industry times for chopping 1g & 2g 35mm back boxes in concrete block and then fixing . All using power tools. I know how long it would take me! But will be subbies... My luckins doesnt list it and my old spons only has chopping by hand times which I reckon my mum...
  22. uksparks

    Domestic Power to outbuilding, possible structural steel...

    Hi, I have just been to a job today to provide power to an outbuilding, 75 meters down the garden. The supply is PME, I plan on splitting the tails into a henley block and then into a switched fuse, then 16mm SWA from there all the way down the garden, at 600mm under the lawn. The building is...
  23. B

    Underfloor heating query!

    I'm installing under floor heating on a concrete floor, it will be having wood flooring. Just wondering if I have to enclose the cable in a steel conduit or use armoured? Or if I'd get away with clipping t&e on the floor? Any advice would help. Thanks.
  24. R

    Underfloor Heating Insulation??

    Hi i have done many underfloor heating systems on ply lined floors but never on a concrete levelled base. The question i am asking is it ok to use polystyrene thermal boards with a mesh type mat i know they are ok with the foil mats but i am unsure with the mesh type. I dont want it to be a...
  25. billyblade

    Diamond core drills

    Hi everyone. I represent a company who manufacture and distribute drilling and trade solutions which are particularly popular with electricians. I'll not name them so as not to advertise on here.:smiley2: We have a dry diamond core drill kit in our portfolio which sells very well but i feel that...
  26. Z

    Bosch GBH 18v-li SDS

    Hi guys, I have just bought this SDS drill from Bosch. Anybody else tryed this? It looks shockingly week to me! 5.5 in concrete is a massive strugle. Or is my drill factory faulty?
  27. brizospark

    Addition to circuit not up to bs7671

    Where do I stand with this one? Got sent to a job today to install an extractor fan in a domestic bathroom for a letting agency When I got to the property I knew it was going to be an awkward one. My plan was to take a three core from the ceiling rose in the bathroom to a fan isolator switch...
  28. O

    running mains cable underfloor along a concrete sub floor

    I have just had an extension built to extend the kitchen and provide another room.The old kitchen area has honeycomb walls supporting a floor joists on a concrete base. The base is clean and without debris. The builder has suggested that when the electrician comes to to wire it up he could pass...
  29. jason121

    Solar fixings

    I have two enquiries for solar on commercial buildings, one has concrete beams instead of the normal steel does anyone have any ideas the other a school with PVC flat roof. Spec from architect thin film panels mounted at 3 degrees direct to flat roof I welcome some ideas many thanks in advance
  30. D

    swa to outbuilding

    hi guys. got a job to quote for for for an outbuilding. in the past been lucky enough to get an swa cable under the ground, but this time theres not much chance of that. as its for only a couple of sockets my easiest and cheapest route would be to fuse down a spur from the ring inside the...
  31. J

    Advise for an outside socket

    Hi all, We had a cable ran down to the bottom of our garden for when we were going to get a garage but we decided against it. I was looking to get an outside socket fitted down there for hoovering the car etc.. the only problem is there isn't anywhere really to mount it. Currently the cable...
  32. O

    Floor sockets in concrete :(

    hey chaps, today I had to replace a floor socket and knockout box. It seems its been ran in steel conduit and joined to the original KO box using a male bush. Then concrete has been poured all round the box etc. Obviously this is excellent for me to remove and replace so had a right pig of a...
  33. D

    SDS Drill

    Hi there!! My SDS drill is on the way out. Thought it was time to upgrade to something a little better. Mainly use it for fixing holes and anything bigger I would just crack out the tried and trusted 110V. I liked the look of the Panasonic SDS-Plus Rotary Hammer Drill Driver 14.4v IP...
  34. B

    Max loop reading using RCD

    How about this for a ponder..... Lighting circuit wired in metal conduit buried in concrete, conduit used as the earth no seperate CPC Replaced board reconnected conduit to main earth but readings are 45ohms obviously the conduit has broked down My question is this, before RCD's on lighting...
  35. T

    Access To TT systems Earth Rod for PIR?

    Hello fellows, Just wanted to get your thoughts on this... I'm working on a property with a TT supply in the hills, I have tested the Ze at 13.5 Ohms, very healthy Earth Rod I thought. Only problem is that its been concreted over through the years so all that now exists is the earth cable...
  36. T

    incoming mains supply under concrete

    Hi, Can anyone suggest what advice they would give in the folllowing situation. The incoming 240v armoured supply cable to a property runs under an area set out for a small extension - so the finished floor of the extension will cover the cable by some 18 inches and at that depth there will...
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