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  1. Amp David

    Single or double pole RCBOs???

    Installed a garage CU, 2 way. As the house is TNC-S an earth rod has been installed, which is giving an Ra of 102 ohms. The supply to the garage is protected by a MCB on the non RCD side of the CU, as installation methods don't require RCD protection. The circuit in the garage has been...
  2. W

    Outside PIR Floodlight

    Hello People A friend of a friend has asked me to put a 150W PIR security light at the back of their house as they believe someone is coming into their garden at night. I said no problem and would just tap into the lighting circuit under the floor boards but they don't want any of the house...
  3. K

    RCD protected sockets

    I have a cafe to re-wire and they have 2 freezers that Iam going to wire dedicated sockets for. I dont want to put these with RCD. Will it be possible to use SY cable as opposed to SWA cable will be in plastic trunking surface. I was on the understanding has to be more than 50mm flush, steel...
  4. U

    Surge Protected Socket Outlets

    just having a scan through the examiners notes posted regarding the 2391 noticed on of the comments made was ' "could not state the minimum test voltage to be used and the minimum acceptable value of insulation resistance when carrying out a insulation resistance test on a circuit containing...
  5. R

    Split Board

    Hi there All, Why if a Domestic Lighting circuit if feed off the unprotected side of a slpit-board does the RCD on the protected side Open if an upstairs light (dimmer) is cycled on and off 8-10 times? The light of course stays On! I have checked that the correct number of neutrals match the...
  6. marksparky

    rcd to be or not to be

    :confused:Hi folks i am soon to be carrying out some work at a beauty salon some extra sockets, lights and a disabled alarm to be added but not nessescary for new circuits, the current wiring not in steel conduit or buried 50mm do i have to change the lighting circuit at dis board to be rcd...
  7. S

    Existing external lighting circuit.

    I want to add a light fitting to an existing circuit (installed around 5 years ago). has one fitting on the circuit at present with an switch in the garage on a 6 amp MCB, tested out fine, do I have to put an RCBO on the circuitif I add on to it ? Thanks in advance :confused:
  8. N

    1mm cpc in ring mains

    Hi guys my local authority have asked me to carry out some PIR's on some properties with regards to upgrading them to 17th edition. I suspect that the rings will be 2.5 t+e and will have a 1mm cpc, if left will the properties comply with a 1mm cpc using a 32 A mcb (obviously RCD protected) or...
  9. T

    council building p.i.r

    Called to a public council building to carry out a p.i.r on it Came across disabled shower room with, hand dryer, water heater, and convector heater 3kw all class 1 ,all Supplied by switched fused spurs in the shower room 30marcd protected style Shower without basin/wet room fig701.1 Now all...
  10. E

    2 RCD's

    Hi guys I was just thinking about what someone put about a question I asked a couple of days ago. I asked about putting an RCD proceted fused spur on a ring main to feed an outside light. they said the RCD fused spur will be fine as long as its not protected by another RCD on the cu. My question...
  11. T

    shower

    Hi all I've been asked to put in a shower needing a 40 amp breaker but there is only a 30 rcd on the 1 half of the board what is the easiest way of doing this as a freind of mine sid that as long as you have a disconection of .5 secs you dont need to but i cant find anything to confirm this. is...
  12. tuckermot

    using a rcd spur!!!

    :)can anyone answer this question please !!!! fuse board is non rcd with 3036 rewirables job is to run power and light out side !! Question !! when taking the feed from the lighting radial or ring final if i used a fused rcd spur to extend the circuits would this be acceptable with...
  13. M

    rcd question

    Hi all, this is my 1st post and my first electrical job for a while. I apologise if these questions are simple but i would rather sound stupid and be safe than be quite and dangerous. I have recently been made redundant and took a course and updated to the 17th and part p(did a 3 yr...
  14. A

    Commercial kitchen tables

    we have a site where in a school kitchen there is a stainless table with just a sandwich maker on it, we are being told enviro health officer said it wants bonding is this correct? the socket is rcd protected.
  15. D

    testing additional cu

    Hi all im new to the site, hope all ok. i have just re-wired my garage for the purpose of getting registered again. The garage is fed from main consumer unitby 2.5 t+e and then joins a swa, which is all existing. I have re wired the garage, put a 2 way rcd unit in, 1 ring main, 1 lighting...
  16. H

    Sub Mains

    Does a 16mm TWE sub main feeding a consumer unit with 2 x RCD's and a main sw, wired under floor boards need rcd protection ??
  17. W

    time delay rcd on tt system

    can someone please tell me why when you change an old rewireable fuseboard to a circuit breaker consumer unit does it have to consist of a time delay rcd on a tt system? and also what would happen if you didn't put a time delay rcd in?
  18. H

    mk rcbo 6a

    Does anyone know where i can purchase mk rcbo 6a.No wholesalers have any in stock in the area where i live.Would purchase approx 10 at a time.Thanks in advance.
  19. K

    rcd in flats

    just in middle of pricing rewire of block of 5 flats and was wondering about the isolation of each flat was going to supply each flat in 16mm2 t+e from the communal area do the 5 16mm2 t+e supplying each flat have to be rcd protected as each flat will be rcd protected and dont want the...
  20. C

    ccu rcds

    hi guys just thinking about something when u change a cu as a upgrade r u putting everthing on rcds ie bathroom light on the upstairs ciruit and the other thing because of the cables not being 50mm in the wall do these have to be protected aswell :o:o:o

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