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  1. A

    Structural steel bonding clamps

    Hello All, I am working on a kitchen extension which has 3 Universal Beams bolted together which sit on block-work. There is no direct connection to earth. However when tested it has a path to MET of 2kOhm. As a result I plan to bond this steelwork. The design of the room means these beams...
  2. J

    Bonding steel conduit around plastic switch

    Any recommendations? I have 25mm steel conduit going into 20mm reducers feeding a plastic time guard switch and then returning to steel conduit again on the other side. An earthing nut is too chunky. I think I need those smaller flat brass plates you get on SWA cables. 1588093418 Found them -...
  3. W

    New Zealand should i earth my steel garage work bench to the power point next to the bench.The bench is constructed of timber but has a solid steel top,cheers

    Should i earth my garage steel bench top,it is constructed of timber but has a 3mm steel top,
  4. S

    25mm steel conduit fittings

    Hi guys, Bored at home, so making a bench using old conduit I ripped out. Trying to use as much recycled as possible and was wondering if anyone had anything lying about. Looking for 8 x dome covers and 8 x tee’s, inspection or solid. All 25mm. Will pay postage ofc. cheers
  5. J

    Steel conduit in tight spaces

    I need to run a length of steel conduit. One end it will connect into a standard 25mm BESA box, on the other end, it will go into a sharp elbow. The conduit has to thread through a hole in the floor that is very close to the wall. If I thread the conduit through the hole and then place either...
  6. T

    Marking holes for steel trunking

    Hi, silly question but in College we only learned how to mark up holes for end caps. I’m just wondering what the standard practice is for marking holes in steel trunking for attaching couplers? The previous Electrician I was working with we used templates but there’s non on this site so i’m...
  7. T

    Persons experienced in steel conduit

    Good afternoon one and all Does anyone in the Dorset area have good experience with steel conduit? If so please could I pick your brains on a few things?
  8. G

    What Code for this one?

    What code would you attach to this gem, I gave it C2. These terminals are contained within steel trunking but are also part of a live 3 phase cct. See picture. It is installed as a 100 Amp 3 phase ring with these terminals every few metres. Distribution boards are connected from these terminals...
  9. K

    Industrial I need someone to enlighten me about Earthing and Bonding. We've just completed the construction of four Fabricated Steel Bay Structures with a tota

    I need someone to enlighten me about Earthing and Bonding. We've just completed the construction of four Fabricated Steel Bay Structures with a total of 354 Stansions 102 Beams, all connected to the Porlins, the place is to be used to seat 120,000 persons. I am not in doubt of the importance...
  10. The apprentice

    earthing of steel trunking

    hi guys just bare with me please still learning lol! if i have connected my steel trunking to the metal frame work via bush and cuplin and and the steel frame is earthed and i can prove continuity from my trunking to the steel work do i still need to earth my steel trunking and also do i need...
  11. N

    Steel conduits acceptable for earthing in domestic property ?

    Evening Just been to quote for a consumer unit upgrade. Found that the board was from circa 1960 and wiring looked original also. No alterations have been made with exception of a few faceplates renewed in the kitchen. Red and black single cores going into an adaptable box at the back and...
  12. S

    Bronze screws in stainless steel

    I'm installing stainless steel sockets in my new house and I'm wanting some contrasting bronze screws. I've installed stainless steel screws into bronze fittings before, and I really like the contrast. However, I don't want the screws to be a dirty brass colour, I'm wanting a bright, shiny...
  13. Soulcraft Electric

    BISF (British Iron and Steel Federation) prefab houses and main bonding

    Carried out a couple of EICRs on BISF prefabs and on both there is no main bonding to the steel frame of the building. My scheme technical helpline advised that main bonding was not required. Just wondered what people's thoughts are here? These are NOT pictures of the actual lofts (the roof...
  14. Z

    Steel conduit used as CPC in flat, can’t find bonding, can’t find ring main CPC at C.U

    I’ve been asked to add a couple of extra points to the single ring main in a flat. Building fabric is concrete, all of the electrical installation is steel conduit buried in the concrete. I opened the consumer unit and could only see one CPC for a radial socket, as well as the main Earth. No...
  15. B

    Steel Conduit Bending Writen guide.

    Looking for writen guide to bending Conduit. All conduit bending guidance seems to be done through word of mouth. Looking for a writen guide even if ancient There must be something writen down with guidelines, angles etc. There seem to be US guides but nothing for the UK. Thanks.
  16. H

    How to test a circuits in steel conduit as the cpc

    Good evening I am currently a training to become an electrician. I do hold both initial verification and periodic testing qualifications however this is an issue I have never personally had to deal with and was never mentioned on any of my courses as often seems to be the case. Basically I am...
  17. J

    SWA - earthing the steel wire?

    Hi I’m new to the forum & just a DIY’er! I’m running a 15m length of 2.5mm 3 core (twin & earth) SWA to our decking at the back of the garden for a double socket. Must the steel wire armour be earthed using the banjo or is the CPC core sufficient? Thanks in advance! J
  18. Jay89

    Steel Conduit bender 20/25mm

    After a steel conduit 20/25mm bender with clamp and formers etc. Happy to collect if anyone has one available, just north of London.
  19. H


    Hi I have one of these that was installed years ago to feed a garden pond using pyrex, what function does it perform and should it be replaced?
  20. D

    copper equivalent of steel

    Does anyone have the copper equivalent of a two core 16mm SWA to hand? Or the minimum SWA 2 core CSA in which the steel would be equivalent to a 10mm copper conductor? Don't have the info to hand. Thanks.....
  21. cprfenom

    extending the earthing arrangement for a steel framed commercial building under 18th edition

    Hi Guys, This is my situation: Existing brick building demolished and replaced with steel frame, steel panel clad warehouse/storage structure. Original building had two electrical supplies: 1 x 63A single phase and neutral via 3 core PVC SWA PVC 1 x 100A TPN via 4 core PVC SWA PVC plus equal...
  22. D

    Should a giant steel framed human aquarium be earth bonded?

    I have a large, portable steel framed tank. approx 6m x 2m x 2m. It is used for actors/models to perform in for a variety of productions. For many years now, I have had conflicting advice about whether or not it should be earth bonded. The initial response is "it's a giant steel structure, bond...
  23. 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...
  24. N

    Steel Channelling vs PVC Channelling

    Sorry if this has been asked before, can't find it. Which one do you prefer using and why?
  25. DavidSpark

    Steel conduit - tips and tricks?

    Hello! Got a few jobs on the way that involve large amounts of conduit work. All surface mounted and will mostly be mounted externally around the building. I was just wondering if anyone has any good tips, tricks or good points to think about when doing it to be quicker and more efficient...
  26. S

    Induced Voltage LED / Steel Trunking

    Just fitted some 10 Low Bay Led all wired in steel trunking. Have just noticed my volt stick light up on 3 cables that are not even connected to anything. Gets volt meter out and I've got 38v on it. Seems a hell of a lot. Anyone else found this with LED power supplies
  27. D

    Running cable over steel beams below chipboard floor

    My builders have left a 20mm gap above the steel beams supporting the new first floor by setting the timber joists 20mm above them. Is it acceptable to run cables through the gap and over the beams? Cheers Dave
  28. andysparkfree

    95mm 4core SWA, just trying to go definitive on the steel to copper calculation

    good afternoon guys I have a 95mm 4 core swa to this new office build , thats fed via a new exterior mains panel located next to a new sub station. now all feed cables on this project have been designed by an independent company, and i currently have flagged up that i believe that using just...
  29. C

    Cannot Find Brushed Steel 45 Amp Cooker Control Unit - Vertical?

    Hi all, hope everyone is well. I'm looking for a replacement cooker control Unit similar to the one in the picture. I am after a brushed steel or satin one, but I cannot find one anywhere with these vertical dimensions. The tiles behind the socket have already been cut to fit this shape by a...
  30. J

    Conduit die set recommendations

    Hello, Can anyone recommend a good quality 20/25mm conduit die set? After looking online prices seem to vary quite dramatically. I Want something solid that will serve me for many years to come, Thanks Judd
  31. B

    Burying Galvanised Steel Conduit

    I was wondering if any of you have any experience burying galvanised steel conduit? My current plan is to make up the conduit, T-Wash it and give it a couple of coats of primer and hammerite before I sink it in the ground but I'm wondering if it will be enough? My Father has suggested covering...
  32. J

    Brushed Steel Screwless plate - which Brand?

    I have to install roughly 150 points at a large property. The client is style conscious and wants to install Brushed Steel / Chrome / Nickel Flat plate sockets and switches. Is BG Nexus a good and sturdy brand? Not shoddy quality like LAP which keep falling off / failing. Mainly worked with MK...
  33. HumbleWorker 91RT

    Anyone have or regularly use a Mini lathe for steel or wood?

    Yo guys, More than likely some of the older boys (naming no names) may have used a lathe once or twice, for machining little parts and bits and bobs on your home projects? Looking at broadening my horizons and add some feathers to a pretty bald cap. Cheers, HW
  34. Strima

    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...
  35. W

    Stainless Steel 20mm Conduit

    Hello, Got some stainless conduit to do in the next few weeks, I was wondering anyone with experience with this... I mean have you used your normal stock and die for threading? Maybe a fresh die if its getting a bit old in the tooth? Plenty of cutting compound of course, was just wondering...
  36. T

    steel tails for new consumer unit

    is acceptable to use the existing steel tails when fitting a new cu? (provided all of the test reults are ok)
  37. SparkyChick

    Domestic remodel - Sanity check on a couple of things

    Hi all, Currently quoting for a fairly extensive remodel of a kitchen diner, and I have a couple of things I'd appreciate a sanity check on. 1. Structural steel bonding - My brain is telling me based on what I've read and understood that I don't need to bond the new structural steels. They...
  38. W

    New to site, looking for advice on supply to steel container .

    Hi, Everyone and thanks for the welcome from Dan. I had originally been asked to install a light in a small steel container, used as a tool store at a commercial premises. The container is situated outside, mounted on wooden sleepers on a concrete base. Its sandwiched between to large wooden...
  39. JohnnyRingmain

    Wiring a container

    I've got 4 containers, each needs a 6ft light and a switch wiring which is no problem. But I'm having trouble working out the best way to gain access to run the cables. These are bare containers used for storage of materials so no wood or anything to actually fix the lights too either. Has...
  40. R

    can steel wool start an electrical fire?

    Hi, I've just mouse-proofed a victorian house internally, using steel wool to seal all possible gaps throughout the house. However I've been advised this can be dangerous as any exposed electrical terminals can ignite steel wool and start it burning. I've tested this myself (9 volt battery and...
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