concrete

  1. K

    Advise on how to route Power supply for UFH on concrete slab

    We are replacing the flooring for the whole ground floor - it is a circa-2000-build house with concrete slab. We're taking the opportunity to put in UFH at the same time. As it is a retro-fit, we are going with electric to keep the floor raise to a minimum. Going with 150W/m2 heating - which...
  2. W

    Best way of hiding tv cables on concrete wall

    Wondering how other people have done this. Would you guys use some pvc trunking giving you access to cables at a later date if needed if you would yous just raggle them into wall?
  3. A

    Best Corded or Cordless hammer drill for concrete?

    I have some projects on my hand and it involves driving into concrete. Therefore, I thought it would be sensible to invest in a hammer drill I am kind of confused whether to go with cordless or corded hammer drills. I know cordless ones gives you mobility but corded drills give you more power...
  4. newfutile

    Metal steps secured to concrete (bonding)

    We have had 2 metal steps installed to cover main supply cables (out to flats) from a Ryefield . when measured IR from MET to steps i got 0.091 MegOhms. The usual calculations are for when a 30 ma RCD is protecting (which is not the case here) 91 Kohm is above the usual value of 23 Kohm I...
  5. Mark42

    Metal saddles inside trunking when only 400mm off a concrete floor?

    I'm a bit out of touch re 18th edition. Is it really necessary to fit loads of additional metal saddles inside trunking when it's only 400mm above the concrete ground floor of a sports hall? All the stuff about premature collapse makes sense, but where, in this case, if the cable going to...
  6. J

    30A Ring in conduit in Concrete wall

    Conduit has part of run in free air, part in concrete with external wall insulation on one side. What derating factor / cable size ?
  7. P

    Drilling prefab concrete

    I have been asked about putting in a couple of network cables that need to go through the internal walls of a building. It appears to be constructed of large prefab concrete slabs, I guess they might have rebar in them but no one knows for sure. I have reasonable access to both sides once the...
  8. I

    ECP's in Prefab Concrete Outbuilding- Damp Concrete?

    Advice required from the more experienced and knowledgeable. Has anyone installed power to one of these prefab concrete garages with a steel roof structure, steel clamps (on concrete panels), steel door mechanism and damp concrete floor? My conundrum is that I intend on upgrading the current...
  9. HappyHippyDad

    Depth to bury armoured cable in concrete with vehicles passing over?

    I will/may be burying 16mm SWA in concrete to route it to an outbuilding (for the kiln I have just been chatting about!). This will be getting driven over by cars. Is there an ideal depth for this? Also, does the SWA require any further form of protection?
  10. J

    Rewiring flat with concrete everywhere.

    Hi Iv been asked to price a rewire in a 9th floor flat with cast concrete walls floors and ceilings the customer is adamant they wont have trunking or lower the ceiling's, putting coving up also wouldn't work due to there being to many obstacles. It is currently wired in pyro chased into the...
  11. Vortigern

    Burying 2.5mm ring circuit cable under concrete floor in flexi conduit

    What is your view about such an installation technique? Asked to finish extension wiring and the installer has snaked wire all over the floor in white flexi. They intend to put an island in and this could easily lead to damaged cables. The other wiring for lights etc. is abysmal like a massive...
  12. S

    Can I avoid applying correction factor (Ci) when cable tray passes through a concrete wall?

    Hi This is about a design problem in an assignment. A cable basket containing several circuits passes horizontally through an internal concrete wall (100mm) and into a ceiling void where it provides lighting throughout the building. I'm trying to size the cables for the circuits and I'd...
  13. M

    Domestic What type of electrical cable will be good to bury in walls?

    Hello, I just bought an old apartment and i need to make 4 new dedicated power lines (AC , kitchen, Washing Machine and heater). There are concrete walls and cutting chases will be very difficult, i was thinking to choose some type of cable that can be covered with plaster, without tubes ( only...
  14. M

    Using IEC cable under concrete floor

    Hello I've been asked to supply power to the middle of an office floor to supply the table with power, only a small office but they don't want trip hazards but the don't want floor boxes so to keep there costs down for them instead of it being permanent in case they move I thought of chasing...
  15. S

    How to Remove Box From Concrete Wall

    How can I remove this box from the concrete wall?
  16. 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
  17. 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...
  18. 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...
  19. 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
  20. 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...
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