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  1. H

    Larger installations, what to inspect

    Before adding anything to a circuit it is necessary to ensure that main bonding and earthing are up to standards. This is fairly straight forward for a domestic property, but what does it mean for a larger property. The example I'm thinking of is the school I work in (part-time now, slowly...
  2. J

    larger domestic jobs/hmo's/studios etc- regulations

    Afternoon had an interesting job pop up on my rated people app today- was for rewiring 10x art studios- all the bits and pieces in each studio- consumer unit for each one etc- sounded like quite a nice job to land in the net. However I didnt go for it as I don't think I am quite ready to go...
  3. W

    Larger 6kWp+ domestic install before the FIT cut

    I'm not an electrician, just a householder (though do work in an area given a kick in the family jewels by government decision last year). I am technically minded so want to understand that proposed systems are worth the spend. I have a decent south facing roof space that can take around 25-27...
  4. driverman

    Rotary switches.

    Hi, As daft as it seems I have never installed a rotary isolation switch in my life. I've wired for an AHSP whereby 2 x 1 circuits are required, one of which was wired in 10.0mm. AHSP installers require 2 x isolator switches indoors by control equipment. They insist on isolator switches indoors...
  5. The Solar King

    G83/2 Larger than 4kW Inverters

    Starting to run in to difficulties here. Several inverters that were registered under G83/1 do not appear to be so under G83/2. What are people currently using? Am looking at the moment for a 5kW for an east west system. Only option so far is Solar Edge 5000 which the prospective customer would...
  6. O

    "larger" downlight adaptor plate

    Ok, so I've got a client who's happy to pay for the JCC downlights and the JCC adaptor plates - BUT when I checked the existing downlight holes they measure at 155-160mm in diameter! The JCC's are spec'ed up to 135mm diameter So my question is are their any similar products that can accomodate...
  7. M

    Diversity on a larger scale

    Hi guys, I was just wondering if anyone would be able to help me in the right direction. I'm out in afghanistan working on 50hz systems and we are currently re-wiring a number of buildings (Including the sub mains). After applying diversity to each building we've calculated that a 3 phase 32a...
  8. M

    Advice on Pulling 6 mm2 single core cable through 20 mm Conduit

    Hi, I would like to ask your advice about how difficult it might be to pull cables through 20 mm plastic conduit. (easy, moderate, hard, impossible) I am running two separate lines for a cooker and hob in 6 mm2 single core stranded cable. Both runs will follow the same route. 4 meter run from...
  9. S

    Larger than Required cable Size - Is this OK.

    Here's the situation. For whatever reason this domestic installation has ended up with a washing machine hard wire to a fused, switched (with neon) switch (that was obviously once a cooker switch) supplied by a 10mm T&E on a 16A MCB. A 13A fuse is installed in the switch. The cooker (which...
  10. Sparky Ninja

    EICR Inspection schedules for larger installations (>100A)

    Hi all. I am in the middle of reviewing some fairly large EICR's - colleges and schools etc - and the condition report inspection schedule as per Appendix 6 has been used. It's not been used properly as a lot of it has been N/A'd when clearly it shouldn't have. Anyway's my query is this, for...
  11. R

    periodic testing and the new condition report

    good morning everyone , as some of you may know i`m a school sparkie , 24 years man n boy , full apprenticeship , jib reg , 2391 , 17th , nvq , right my question , i`ve updated my powersuite lite so i now have the new contion reports , that states its for domestic and similar premises with up to...
  12. D

    Strange fault - larger cable tripps mcb ????? Why ???

    Hi There I have a very strange one here , that no one iv asked seems to know the answer to . On a recent test i found a 6mm XPLE SWA cabel protected by a 63A D rated mcb , for 3 phase motor circuit . I desided to derate the mcb to a 50A but it triipped when ther motor was running . So i then...
  13. D

    MCB Problem - Possibly needs a larger rated MCB?

    Hello eveyone! I've recently passed a DEI and 17th Edition course and I've been asked by a friend about an electrical problem and because I don't have any experience I was wondering if someone could check I've come up with the right solution please? :confused: The problem is this. My friend's...
  14. R

    Calculating voltage drop on larger SWA cables

    Hi All A question I've asked many a lecturer and none of them have come up with the same answer. When looking at the current carrying capacities for SWA cables, from about 35mm onwards you get an r, x, z value. What are these and which one do you use when carrying out voltage drop...
  15. D

    Underfloor heating mats

    Hi all, been asked to quote for putting in underfloor heating, but have never done it before. Whats the ' standard way' of wiring them in ? Have checked some online ones and they are around 300W , Ib of around 1.5 amp , so can fuse spur off ring ? or best dedicate circuit ? Wattage prob...
  16. E

    Can some one explain how it works

    Hi all, Ive been given an oppurtunity to meet a company that does all sorts of building works, from schools to local authority and businesses... Ive never had to deal with anyone like this in the past so i feel like a little fish swimming upto a big fish The thing i would like to know is...
  17. D

    Help on a larger system's design

    Hi all, We've been asked to look at installing PV to some large farmyard storage barns. We're organising a structural and asbestos survey but I think we'll also need a commercial electrical survey and some help designing the array itself. If anyone's got experience at this level or used such...
  18. P

    timeguard light switch

    Anyone know of anything similar to this 24 Hour / 7 Day Security Light Switch that can switch low energy bulbs of 7 to 12 watts, all the ones i have come across seem to want to only switch larger loads of 20W or more even the ones with separate fluorescent adaptors still say they are for larger...
  19. J

    Question regarding changing Consumer Unit for a larger one

    Hi there, Could i possible get someones views on this? Weve had a new kitchen installed during which we decided that we would have an induction hob. when we bought the hob they told us it would need to be on its own RCD in the same way our existing cooker was. So before the new units...

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