rcd's | Page 8

rcd's

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  1. D

    RCD's

    HI all. I'm a newbie trying to learn as much as i can to get a head start for when i start official training, enjoying it so far! I had a thought regarding RCDs, I acknowledge its probably not cost effective, but would it be acceptable to have every socket in a household as the RCD incorprated...
  2. P

    Split Load Board Certification Question

    Hi,How does everyone fill out the certs for a split load board to include the RCDS if issuing a DOMESTIC ELECTRICAL CERTIFICATE? How do you include the details of the split loads and the submain RCD characteristics into the boxes provided? Do you test RCD tripping times for each circuit even if...
  3. C

    Mcb's, rcd's and rcbo's

    Can someone please explain to me the difference between an mcb, rcd and an rcbo and in wat circumstances is each used, I knw an mcb is your circuit breaker and rcd is a circuit breaker but wat u wud use in say a wet area but y is it better then an mcb is it a better disconnection time and iv...
  4. S

    Dont you just love RCD's.

    Done a job today. new high integrity CU. All wiring test out spot on as new and well within spec for everything. Changed CU, lovely. Started plugging appliances back in. Fridge trips RCD ,Freezer trips RCD, washing machine trips RCD, everything else fine. Told householder he needs new...
  5. S

    Hi Zs solved by changing RCD ???

    Hi everybody, Ok, here is the picture. Main house is TN-S Ze is 0.25 ohms There is a 16mm swa fed from a 60a isolator, which in turn is fed from 25mm tails into henley blocks. The swa is clipped outside the side of the house, buried in the garden and along approx 25 meters into a small...
  6. E

    Shop rcd's

    Does a shop have to have rcd's or can it run on normal protection ?
  7. D

    RCD's On lighting etc

    Hi guys wondering if you can help. I did my 17th update as i took a break from the trade for a few years. I finally go back to my firm tomorrow and its all changed. Trying to get my head around the RCD stuff. RCD's on everything now right including lighting thats not capped etc ect Do...
  8. N

    RCD's and how they should work

    OK chaps RCD's we all know what they do ,they work if a fault to earth is detected basically an imbalance ,my concerns about these is that recently ive had three gardening tools in all class 2 two core , cables cut in half , didnt blow the fuse or trip the RCD so live ends floating about ,me...
  9. G

    TN-S and RCD's

    Just done a load of inspections on a caravan park where the entire distribution system is TN-S. Problem is that quite a few of the Ze's are above 0.8 ohms stipulated as maximum. The question is, does the use of RCD's mitigate the above parameter readings? or will they have to get the Ze's...
  10. V

    time delay rcd's

    is there a good use for time delayed rcd's any more. they dont seem to have a point now were on the 17th......or am i wrong....again..
  11. H

    Re wireable fuses and rcd's.

    Hello all. I'm qualified but not competent. Lacking in experience, a catch 22 as I keep being told by prospective employers over and over again. I need to rewire my kitchen before a new one is fitted and it will be good practice. The wiring is currently a mess. Lights and sockets on the same...
  12. H

    Shower and RCD's

    Hi, can someone please help me. My shower is on a separate unit. My RCD has tripped, i have checked the wiring, and tried to reset the RCD but to no avail, my shower will not work. I have replaced the MCB, but still nothing. Does my RCD need replacing do you think, or could it besomething else...
  13. G

    RCD's In TT Systems

    I am quoteing to change an old consumer unit to 17th edition on a TT installation. I have checked the regs and it looks like the preffered option is to give added protection by changing the 100A main switch to a 100A 100mA RCD together with the 30mA RCD protection already in the board. Firstly...
  14. H

    How come some rcd's......

    ........ trip on a neutral to earth fault but then some dont:confused:
  15. J

    Qs on assessment day ??

    can any one give me sum examples of the king of questions they will ask me.??? eg why do zs test things like that???
  16. D

    RCD's (needed or not)

    Hi, Just changed a mains board in a factory (3ph, 36 way) Put the power circuits on RCB'Os and the lighting circuits on MCB's. The wiring is either singles in a 3x2" trunking or using SWA tied onto tray. Am i correct in thinking that the lighting circuits do not have to be on RCD's??
  17. S

    WYLEX 100mA 80A RCD

    Hi all, Does any one know if a WYLEX 100mA 80A RCD WEM 80/2 is time delayed. It currenty protects a TT system and I will be upgrading the consumer unit to an 17th edition unit with 2X30mA RCD's. I worried about discrimination, and dont want it tripping before the 30mA RCDS's I know removing it...
  18. T

    BS4293 & ELCB RCD'S Obsolete.

    When you come to do work in a property either an addition or alteration to a circuit, what are you doing when you find either of these RCDS in the board? (BS4293 Current breaker & ELCB Voltage operated breaker) I know there obsolete now so should be taken out of service, correct? So would...
  19. D

    Does cold weather affect RCD's?

    Does anyone know if cold weather can affect RCD's, I have just been testing the 63A 30mA RCD in the garage, this previously tested absolutely fine when doing the test at 30mA, but now it fails to trip in under 400ms, however when doing the 5x test it is fine :confused:, the test button works...
  20. P

    RCDTripping,

    Hi, My RCD (B Type) in my warehouse trips every now and again and there is a small compresser and pump and a couple of washing machines along with a couple of other small bits, All on seperate circuits. Just wondering could i change the RCD to a C Type and would this sort the problem? Thanks.

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