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  1. 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...
  2. A

    Rose circuit bedroom wiring mayhem, 3 blacks dosnt work!!!

    After purchace of three debanhams lights and sucessfull fitting of 2 the third has caused me some unrest due to an ensuite bathroom within the circuit. 1) Presented with three reds and three blacks i wired the three reds togther. Wire 2 blacks into a sucessfull bedroom switch leaving one...
  3. ThatMatt72

    UK Can't get within maximum load when applying diversity

    Hi all, I wonder if you might chuck in your 10 cents worth on this on? I have been asked to install electric heating in an office up on the 4th floor of a building. I've looked at the layout of the room, with regards of seating etc and after consulting with the occupiers have decided on the...
  4. Thomas Simons

    Domestic RCD Protection for lighting within communal parts

    I'm due to start working in a building which houses lots of flats over 6 floors with 2 internal communal stairs. I'm due to replace 13 ceiling lights per floor/stairs from a halogen bulkhead to a ELD 17w LED microwave/emergency bulkhead. Each floor is fed from a Square D B6 QOE MCB on a 3...
  5. M

    Domestic Leave existing ceiling rose within new metal light fitting??

    I'm your average DIYer and after advice about replacing a pendant light with a new flush metal fitting. I can fix the new light to the ceiling and the existing rose sits within the void of the new fitting without any clearance issues. Is it OK to leave it in place and wire the new fitting into...
  6. O

    Which Publication is this?

    This picture was sent to me by a plumber - so I'm guessing its some form of plumbing or gas safe regs He was saying the bond HAD to be within 600mm and that my regs (BS 7671 AMD3 were wrong!) So I was wondering is this is the document above that needs changing to reflect the proper description!
  7. lurch

    Rating factor within an enclosure?

    I seem to recall there is a rating factor that can be used within an enclosure effectively uprating the current capacity of the cable. Does any one know what this is and can it be found in BS7671 or is this a rule of thumb (?) for switchboard manufacturers?
  8. S

    Install within agricultural sector?

    Been trying to work out if I can legally install a 240 panel with 24v outputs within a poultry farm as an addition. I have zero qualifications but am prepared to train. From what I’ve read so far you just need to be competent, which leads to which qualifications would prove this ? Would the work...
  9. DavidSpark


    Hello, Quick introduction, My name is David and I work as an Electrician within the military, I've been doing that for the past 4 years. Worked within the industry with bits and bobs here and there since 2009, most of that time since then has been spend in education. Looking forward to...
  10. D

    RCD tripping times exam question

    I sat the 2394 written exam tonight and one of the questions was about testing a 30mA RCD. It asked which tests you would carry out and the permitted tripping times. I answered that at 30mA and 150mA it was equal to or less than 300ms and 40ms respectively. Which I believe to be within those...
  11. VoltzElectrical

    Naked Ladies? the results for L-L and N-N should be within 0.05 ohms

    Naked ladies are lovely. especially if they are fit. However, on an electrical note... When testing ring final circuits end to end tests confirming the ring. I have recently been informed that the results for L-L and N-N should be within 0.05 ohms. I know that they should be the same, but where...
  12. I

    Industrial Satisfactory or Unsatisfactory

    Hi fella's , Following a recent report I have had sent to me t was deemed that multi-core SWA doubled up to supply a single phase piece of equipment, was unsatisfactory for following reasons. 'Poor onsite installation practice may result in increased risk of failure,electric shock or fire'...
  13. D

    minor works high Zs Values

    test, cant seem to post????
  14. F

    Cutting Slots In In Metal Dist Boards

    hi lads what ru using to cut slots in metal dist boards consumer unit my old jigsaw has justgiven up on me many thanks paul
  15. robd

    Hot tub volt drop

    Hi All, Been to look at a job with a hot tub 27A load, 30 metre run. Don't do much volt drop calculating but here's what I did, anyone disagree? Thinking 6 mm armoured so: 7.3x27x30/1000=5.91v max permissible (5% of...
  16. A

    Within Competent Person Schemes

    Hi, I would appreciate answers from those who have worked within a CPS. From the 'Practical Solutions' thread some will have seen that I raised that it might be possible to effect change from within the schemes. However, this is from the slightly naive vantage point of little...
  17. saucyjack

    Cooker control switch needed or not?

    Hi guys, just a quick question: I appreciate that if you're installing a cooker, then there ought to be a cooker control switch fitted within 2m of the appliance etc., no probs. However, what's the deal with a separate oven and hob? I've got these to install soon, and it's my intention to feed...
  18. B

    EICR Flood

    Hi Guys on a job that was affected by recent floods carrying out an EICR My question is that although the downstairs and kitchen rings are testing up ok I have concern because the cables that were run under floors were sat in water for over 4 weeks. I can't find all JB's but there must be more...
  19. G

    door alarm system

    Hi everyone. I have had a request to fit a door alarm system. Basically client needs a buzzer fitted within an office that will operate when either the front or back door opens at night time only. I have a general idea of fitting 2x door magnets, when door opens buzzer activates, psu fed by...
  20. H

    Help with EICR code!

    Hi, just wondered what your thoughts are on this, 3 bed town house Whole house ring final, mixture of 2.5 / 1.0 & 2.5 / 1.5 twin and earth cables, End to ends = 0.78, 0.78, 1.6. R1r2 = 0.61 (spur). ZS = 0.66! BS7671 recommends a max of 100 square meters which using 2.5/1.5 = an r1r2 of...
  21. F

    Solar PV for my new roof?

    Ihave a South facing Slate roof big enough for a 4KW Solar installation. Itis on a 3 storey semi detached house in the South of the UK Iam soon having the roof replaced and am looking into Solar PV Iwould appreciate any comments and experiences that you can kindly offer Isthere anything the...
  22. B

    Bathroom Hairdryer

    Hello All Wise and Wonderful Persons!!!! :rofl: (only joking!) I am currently working in a house which is being complete refurbished. Whilst walking through the job with the client, he asked if it was possible to have a power supply for a hairdryer within the basin unit in the bathroom, so...
  23. W

    Websites SEO and online marketing

    Im looking at scrapping my existing website, which was only a basic reference based site i am planning on getting a professionally built, optimised site and using the company for seo to build the site up, and get a decent presence this isnt cheap but i can afford it within the marketing budget...
  24. G

    NO water mains

    With regards to main bonding, what is the solution if there is no sign of a water mains? The plummer says the stop cock is outside the property in the street and there is no off valve coming into the house.
  25. R

    1950's fusebox.

    Doing an EICR on a church at the moment and found this board serving some lighting circuits within the chapels all wired in tinned copper imperial singles run through conduit used as cpc. The switch fuse feeding this board is located remotely at the intake position within another area of the...
  26. I

    sqaure d breakers

    Is a type 3 sqaure d braker equivelent to a type c breaker been to house was asked to fit mcb c32 to protect an oven and hob at roughly 6kw without diversty i know its not the norm to fit type c breakers for fixed restive loads i know they are used for comercial purposes where there is a high...
  27. R

    oven and hub switch optional?

    Hello there. I recently had a new kitchen installed. There is a large switch that lights up when switched on above the oven and hob. I thought this switch had to be on for the oven or hob to work. However the oven and hob work if this switch is off or on, it seems to make no difference at all...
  28. S

    BG jobs

    Requirements You MUST have the following as a minimum With a clear focus on customer awareness and the commercial aims of British Gas you will carry out installations and repairs to wiring systems and central heating wiring systems within customers' premises to the highest standards with a...
  29. S

    Rcd Protection.

    I'll cut a long story short, I installed an in-line fan for a customer of mine about 6 months ago, i took a supply from the lighting circuit into a cupboard within the bathroom, where the customer wanted the isolator installed. The cable was clipped direct within the loft, then to a small length...
  30. the pict

    Tri phase board out singles in

    I am doing commercial refurb at the mo, everything is supplied from an old Memshield 3 phase board, the landlord wants the various spaces metered so he can bill the tenants separatly, at present he is just adding a flat rate to the rent, I have no issues with how to go about it however one unit...
  31. A

    poor rcd tripping times

    Hi all After having the shower circuit upgraded to 10mm cable, new shower and pull switch the tripping times recorded for the existing rcd are as follows. 76ms x1 65ms x1(180) 28.6ms x5 38.3ms x5 (180). These times appear not to meet the standards for the minor works cert and im after...
  32. O

    Commercial Gas Meter Room with Water Heater also Installed

    A large Commercial/Industrial HQ type building with Large Gas Meter installed within its own Gas Meter Room 1M W x 2M L x 3M H approx While investigating a suitable cable route I was concerned to discover that a water heater is fitted adjacent to the Gas Meter. Does any one have any observations...
  33. S

    MCS Accreditation Transfer

    Hi Everyone, So i finally came to the decision to make my exit out of the Solar PV industry and move onto other things. I have got a buyer who has been a surveyor for a National Solar PV company and has decided to take the reigns of his own venture. My only question i have which i think i...
  34. N

    RCD tripping times, 0.4 or <200 etc.....

    I always been told that an 30m/A RCD should trip within 200m/s (x1) and 40m/s (x5). But something iv never taken much notice of before is on test sheet the maximum disconnection time of a circuit less than 32A is 0.4. So....which is it? within 0.4 or within 200m/s????
  35. K

    Neutral lead on RCBO'S

    What exactly are the neutral leads for? and if a neutral to earth happened on a board with just RCBO'S in it, why doesnt the fault travel along that neutral and affect the other RCBO's?
  36. B

    Domestic underfloor heating advice please

    Hi I went to see a job this evening for a building firm that I do their electrical work for them reguarly. The house was extended last year which comprised of a lounge and 1 bedroomabove. the elecrical firm installed a seperate ccu with RCD protection with one mcb for the ring main for the...
  37. N

    Domestic MCB vv RCD

    I was called to a customer today where the oven had blownup over the weekend. Well to be more precise the oven element had fractured and the moisture in the mineral had caused the element to pass current to earth. Now my understanding is that the RCD should have tripped out (which it did)...
  38. rainstorm

    GU10 LED's

    Evening all, Has anyone been fitting "Lamp & Gear" 4W LED's? I've fitted quite a few, mainly in shop lighting to existing fittings, and have had a few failures, some within weeks. Some have been in downlighters and some in spotlight fittings (not enclosed). Just wondering if I've been unlucky!
  39. SibertSolar

    DNO's stating that gen meters are not "Ofgem Approved"

    Hi all, I've had a couple of enquiries lately from clients who have been (somewhat surprisingly) informed by their DNO that the generation meter is not Ofgem approved. Why, all of a sudden, are DNO's deciding that MID approval is not adequate/accepted? Don't they understand the history/nature...
  40. S

    Wylex bs 4293 100ma type s RCD Tripping times

    Does anyone know what the tripping times for an Wylex bs 4293 100ma type s RCD are? Ive been searching the net and just keep getting more and more confused about this i know an bs6009/9 should trip within 130ms-500ms but cant make headway for the tripping times for an older bs4293 rcd.
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