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  1. R

    Kitchen island sockets

    Hello. I have a new kitchen going in with a island in the middle. A 10mm t&e (protected by a 40A mcb) has been laid under kitchen floor for the hob that's going on it. No other cables can be run to it now. Trouble is I would now like two double sockets on it. Can this be done? I thought...
  2. D

    EICR code

    I'm doing a EICR on a caravan site. Came across 5 circuits each supplying about 13 16A socket outlets. All are protected by 63 A mcbs and all wired in 6mm twin armoured cable buried underground. The cable rating for the cable is 46A with the ref installed etc. Im undecided if I should code 3...
  3. Z

    Simple question regarding Non RCD protected SWA run from CU

    As the title suggests, I'm running a submain. The space in which I have to work at the supply end is extremely limited though. The CU at the supply where the SWA needs to terminate is mounted on the inside of the external wall in the porch. Ideally, I'd just run the SWA through the wall and up...
  4. B

    Zs to high on MCCB Protected circuit?

    Hello to the experts of the forum! I am currently checking an installation and the measured r1+r2 of the cable (4c 70mm swa of 550mtrs) is 0.8Ohms using the armourings as the cpc. Ive checked with schneider and the max Zs is 0.38 Ohms (5s disconnection time). This installation is new and i'm...
  5. Hellmooth

    Running new lighting circuit earth

    Hi quick question, got a newly wired lighting circuit that has had the earths chopped, would be easier for me to run a new earth alongside, is there a minimum size of earth if ran in singles and not protected by an outer sheath, got 4mm in my head but not sure where from!
  6. J

    copy of 16th ed- requirments for rcd protection

    has anyone got a link/pdf of the requirements for rcd protection in the 16th ed -more for socket outlets ***sorry if its 25-30 years old- it would be 15th ed right****
  7. N

    Safe isolation of individual RCD protected circuits

    is it impossible on RCD protected circuits ? Reason I ask. I was doing some minor work in my house, spur off ring final. Turned off applicable MCB, checked at the socket with the voltage tester, no voltage. Soon as I started conecting the spur the rcd tripped. I guess this is normal, how do...
  8. S

    Garage Sockets

    Im looking to add 4 new sockets into a garage, there is no live sockets or anything to come off In the garage already so Im looking for something the otherside of the wall to come off of to get my live connection. I have located a socket indoors which already has two wires already going to it...
  9. H

    commercial dsitribution board change leaving existing circuits non rcd protected

    I am changing a commercial distribution board like for like, Can someone confirm im correct? Ive only allowed rcd (rcbo) protection for new circuits or circuits im working on, and noting in my installation cert, that those existing lighting circuits don't comply with amendment 3 regarding rcd...
  10. A

    2.5mm2 ring main protected by 20amp breakers

    So an old colleague of mine stipulates that ring main should be protected by 20 amp breakers. Why you ask? Well he said because a piece of 2.5mm2 can only take circa 26 amps and if the ring main broke at any point it would effectively make it two radials, and it would be protected by a 32 amp...
  11. E

    Maximum Zs for distribution circuits protected by 60947-2 MCCB's

    Anyone know where I can view up to date reference documents etc to acquire the Maximum Zs for distribution circuits protected by 60947-2 MCCB's? Regards David
  12. Dave OCD

    Supply for Combi Boiler - RCD required ?

    Allright chaps I have to connect a new Combi this Saturday morning, intending to fit a 3 amp fused switched FCU and take the supply off a handy socket [about 2 feet away and on a RFC not a spur] The consumer unit is an old MEM with cartridge fuses and there's no RCD, [TNCS system with Ze of...
  13. N

    Everything RCD protected?

    Hi all, My understanding is that everything should be RCD protected now, as it is unlikely that all the criteria is met for it to not need RCD protection. I went to my friends house the other day and the consumer unit had a periodic inspection and test carried out by the local council last...
  14. D

    Armour cable ran to garage on 16a breaker

    Hi Everyone, I have armour cable running from my house to my garage in a new build, it is connected to 2.5 that connects to my consumer unit, can i put a socket before armour cable for my wifes new battery hoover without any adverse effects? its protected by a 16a breaker then runs to garage...
  15. M

    cooker tt no rcd

    hi extended a 32 amp cooker circuit, adding a cooker switch and outlet plate. extended as it is a 7kw range cooker now situated in fireplace. old cooker now not going to be used. problem is its on a 16th edition board and is on tt. the cooker and lighting are non rcd protected. ideal...
  16. S

    rcd or no rcd ?

    Does a 16 amp commando socket installed in swa in a warehouse need to be rcd protected ?
  17. sparksburnout

    Zs out of spec on an RCD protected circuit

    Please accept my apologies if this is in the wrong category, and also my ignorance as I feel I should know this but I think the heat has confused me. In the theoretical scenario where you are doing an EICR on an RCD protected circuit, but the Zs for that circuit is actually (just, say) out of...
  18. B

    3kw Immersion blowing sfcu 13a fuse about once a month...any ideas?

    On dedicated 16amp mcb Wired in 2.5t&e to sfcu (13a fuse) then 2.5mm heat resistant flex. Fuse has popped twice in last 8 weeks etc. Element R 18ohms. all seems ok? Should I just swap sfcu for 20amp double pole switch? haven't clamped to measure the draw yet as didn't have it with me. Cheers
  19. F

    Economy 7 Testing

    OK, I've done a search for the above on the forum and I don't really think a definitive answer has been given, so I pose the question for discussion; how would you carry out live tests on an economy 7 circuit where you cannot gain night access? I pose the following: 1) For non RCD protected E7...
  20. C

    Help with adding RCD protected circuit to old Wylex board

    Hi All, First off.. I'm NOT an electrician and am not about to commence DIY electrical work! Just looking to get clued up before calling a sparky out. I'm having some work done on our bathroom which involves the fitting of Warmup underfloor heating and I've got an issue in that we have an old...

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