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common

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  1. A

    lighting circuits- Type B or Type C MCB

    What do you guys tend to use Type B MCB for lighting circuits but know that some use Type C even when the loadings are low. What do others prefer and why?
  2. H

    Emergency Lighting - Common Points / Modes of Failure?

    Hi guys, be kind, I used to be in the trainee section and need some advice regarding emergency lighting and common points / modes of failure which is a relatively new area for me. Two situations. I have some work in a commercial setting, and have recently noticed that one of the non-maintained...
  3. I

    2 gang 2 way switch with only one common terminal

    Hi all, new here and after some advice on a twin dimmer switch purchased from a large warehouse type diy store. It is marked as a two gang two way dimmer, so I was expecting to find six terminals; one common and two switched live on each of the two sides. Yet there is only one common. Now...
  4. S

    House extension so need to remove and replace FIT installation

    What is the deal with temporarily moving an array to complete building works? No doubt it will be a complete nightmare but hopefully some good experience here? Do they notify or keep quiet?
  5. E

    manufacturer's instructions vs common sense!

    Ok I know this is dragged up time and time again regarding the 3a fuse on a fan debate but i had an interesting one today. i am installing a belling 100dft range cooker, the manufacturer's instructions are tight lipped about the actual wattage of the bleeding thing but the info I got was that...
  6. T

    the more common ways you have been stung.

    i was just wondering if its just me being a soft un or does every customer have morals and gratitude and trust but at the end of the job turns into a cmjvvmj !
  7. HappyHippyDad

    Intelligence V's common sense!

    I have just finished a handover at work and the doctor came up to me to have a chat about his electrics! He is a good doctor and very intelligent. During the weekend, just before a party he was throwing, the 'sockets' MCB trips. He starts panicking as all his guests will be turning up. He...
  8. R

    Control 4 and relays

    Hi Maybe it's an easy task but I could do with some help. I want to link 2 outside lights integrating into a control 4 door station (intercom) so when someone presses the intercom the lights will come on. On the intercom there is a n/c, n/o and a common terminals which I have a cat 5 running to...
  9. W

    two way light switching

    my son has just moved into a new house and has asked me to have a look at a problem with his lounge lights. his lounge has a switch on one side of the room (call it main switch) and on the other side is a double switch. one switch is the downstairs switch for the landing light which works fine...
  10. L

    Common parts lighting

    Hi a little help guys I have to install 4 lights with emergency lighting as back up but to be run of sensors with one on each floor and when activated all the lights come on so therefore all link but just cannot get my head round this does any one have a link to diagrams or have they done this...
  11. E

    2way switching and intermediate conundrum

    Good evening all im in a bit of a pickle. I've wired 2way switching that controls 4 sets of lights from 4 different points. Basically 4g switch on each floor. ive some how really confused myself. I'm having to change some of the modules as intermediate works out in different location for one...
  12. M

    Parallel cables

    Help with calculation please. If separate cable measure : 10Ω, 5Ω, 5Ω, 4Ω and 2Ω what would it be in parallel? I get this so far 1 1 1 1 1 1 = What happens next? 10 + 5 + 5 + 5 + 4 + 2
  13. N

    Two Way Switch

    Is there a correct way to wire a two way light switch, I have one where the two sets of cables are wired Red - Common L1 Black (switched live and Yellow. L2 Red and Blue, another is Red Common, L1 Red and Yellow, L2 Black switched live and Blue.
  14. W

    3 Phase 4 wire, Line Harmonics, Common N question

    Theoretically speaking If I have a 3 phase 4 wire supply L1 L2 L3 and N And the 3 hot phases are 120 degrees offset, bar any faults and line harmonics etc, the max load on the common (shared) N, would be that of the heaviest load on a single phase right , EG L1 draws 63a L2 draws 69a and L3...
  15. gutterball

    spot the fault

    went to change a light fitting on found no earth to lights, client said last spark to look at fault on lighting circuit couldn't find the problem so left cpc out of board. took me about 15min's to find it.
  16. N

    Two gang two way wiring not working properly

    I am testing a property that has the following problem - There are three switches, one two gang two way at the bottom of the stairs (call it hall) - controlling hall with one, landing other One two gang two way at the top of the stairs (landing), controlling hall with one landing with the...
  17. I

    HI just some common quetions about electricians

    HI everyone I have just finished year 10 and I'm really looking forward to be working as an electrician just wanted to know.... what do the average electricians usually make. I searched this question in Google but it gave me totally different answers so yea thanks everyone :)
  18. G

    help with 303 question city and guilds

    State TWO faults which may be found for EACH of the following.a) Luminaries b) Flexible cable/cords c) Wiring Can any one help me with this one?
  19. G

    Most common

    most common causes for rcds to trip when main DB upgraded ? appliances , borrowed neutral , fault elements ?? any more less obvious ??
  20. A

    Eicr on a pub

    Dont you just love it, all the punters must think they are a dab hand at electrics, and the must all be willing to do it for a few pints. First switch i drop the cover off and i find this, its like a rats nest, Anyone else do many eicr's on pubs? And do you come across thing like this quite...

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