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  1. A

    3 phase problem

    Hi all This is probably very easy but for the life of me I haven't been able to discover the answer and solution. Three phase taken to a tpn fused isolator, then taken to a sub meter and split to three spn consumer units (each being sub metered again) The neutral has been taken to a Henley...
  2. J

    Electrical quote - correct information?

    Hope this is in the right section! Had an electrician round to quote me for some new sockets etc. He said my RCB was 16th edition, and suggested that be replaced. He looked at a ceiling rose, and said because the wires were black and red, they must be over 30 years old, and hinted at a full...
  3. matt1386

    Is this diagram correct

    Hi again all, I started college a few weeks late so im a bit behind with the practical assessments The tutor has said he will draw some diagrams with me next time im there to help me catch up I thought id give it a go myself at home so just wondering if somebody can tell me if this is correct...
  4. R

    part p correct documentation

    Can any confirm what books you need, Apart from the Electricity at work regs 1989 i got that. 0 Do you have to have the latest edition of everything? I got the IEE GN3 which i believe has now been changed IET GN3? Is that correct and will i need to update Also on the web site it said GN1? (they...
  5. C

    Not sure if this is the correct forum but wiring advice please

    Hi, sorry to bother you and I'm not sure if this is the correct forum or if this should go in the DIY help forum (it wont let me post there anyway) but I've got a quick question if you could help me. We've asked for some outdoor lighting at work but the boss won't let us install any 'properly'...
  6. rmaynard

    Thoughts needed - Battery back-up

    Iv been thinking about a way to keep the lights on during a power cut and have come up with the following idea, it will be mainly used in domestic properties, iv included an automatic change-over, im picking up a ups today and am going to trial it at home, just wondering if anyone has any...
  7. the pict

    Is this correct

    In casual conversation with a spark he remarked that if an "old board" by which I assume he means a rewirable board if you encounter asbestos flashpads and asbestos fuse liner it does not comply and should be condemned, I didn't question this as I dont know the guy, but I haven't heard this...
  8. G

    Advice on correct certification

    Hi all, I'm having a discussion about the correct NICEIC Certs to produce on a job. The scenario is, we have carried out works out on a big commercial site which include full rewires on three separate distribution boards each being 18 way 3 phase, the main SWA feeding each DB has stayed also the...
  9. J

    Rcd fails test.

    Hi, I've been installing a new shower, using a shower consumer unit complete with rcd. All the tests passed, r1 And r2 were 0.23 ohms, insulation resistance was >299M ohms, polarity was correct. But when I test the rcd I cannot get it to trip. It passes when the test button is pressed but will...
  10. L

    Correct depth for SWA

    What is the correct depth for installing SWA cable ?
  11. 1

    Discrimination and correct implementation of Zs

    Scenario: 3 phase DNO with 100A fuses into a control unit feeding 2x 5kVA txs with combined load of 40A. We're adding 2 more 5kVA txs, one with 14A, the other 21A. What I've come up with so far: 63A fuse consumer side will need replacing with an 80A BS 88-2 (gG) fuse (max Zs 0.57Ω)...
  12. R

    Correct Contactor and MCB

    Hi All I am going to be installing some high bay lighting which will consist of 3 x 400w metalhalide fittings so 1200w in total with runs of approx 60 meters in 2.5mm cable. I will be wiring the circuit via a 20amp contactor with a control circuit of a two way switch system to activate or...
  13. R

    Correct me if I'm wrong but .....

    Correct me if I'm wrong but ..... To become an electrician in the UK I have completed an apprenticeship and continue to be working for a local company going on 5 years total now. I did 3 years in college, plus 2 years on site experience (NVQ level 3) Also did AM2 (what's the point if not...
  14. T

    What is the correct qualifications?

    Hi All, I'm new to the site, so hello all. I've only managed to find old postings to my questions so i'm hoping someone can help. I'm looking to move into property development, and its making me wish more and more that i had studied a trade at college. Im know looking at doing a course at...
  15. J

    Assignment guide

    Hi, i am really struggling to find the relevant books and guidance notes to complete my assignment at Level 3 - 2365. Can anyone please help.
  16. V

    Is my wiring setup okay?

    Hello All, First post. So, I have designed the following setup: The question is, does it look okay? The RCD FCU is on a ring main, using 2 cores for earth from the FCU to Outdoor socket box. Cheers...
  17. J

    Extractor Fan-too simple to be correct?

    I need to put an extractor fan in a small downstairs toilet with no window. I know it has to be fused to 3amps and I know it has to have a run over facility, and that it must be linked to the light switch/switch to conform to building regs. It will be a staff toilet and I am aware that people...
  18. F

    Calculating Voltage Drop on a Ring main

    Hi Guys, I'm fairly new to the industry and have sat and passed all the relevant exams to become a Domestic installer. I'm a little stuck with one of my pieces to be assessed by NICEIC. I'm doing a full rewire at my dads house and would like to check that I'm calculating the cable volt drop...
  19. D

    Is this a plausible wiring diagram for a 12V DC timer?

    Hi, I want to wire up a 12V DC timer (CN101A) to turn an appliance on and off. I have the found on the internet the following wiring diagram for the timer and not being too experienced I was wondering whether it will work if I make the connections as shown: The timer does not show + or - so I...
  20. E

    Full Refurbishment And Socket Heights

    We seem to be getting conflicting answers on whether the recommendations in Part M relating to installing sockets and switches at 450mm to 1200mm respectively also apply to existing dwellings undergoing a full refurbishment (and rewire). Can anyone put the record straight? BC are involved on...

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