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explain

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  1. 1capybara

    Can anyone pls explain 431.1.1 current cant exceed 145% of the smallest wire on the circuit?

    This can have several interpretations. 1. Break trip rating cant be above 145% of the ampacity rating of the wire? That doesnt make sense because the breaker should be protecting the wire by tripping first. 2. Load cant exceed 145% the ampacity rating of the wire? Load should be less than the...
  2. BarryJ90

    Best videos for explain One way, two way lighting circuits

    hi guys Anyone know of any good videos on YouTube for this? I found some myself but I'm guessing a lot of you guys will know from experience the better guys to watch. I know Pete shares a lot of this JW guy so I'm guessing he is good?
  3. W

    part p can someone explain

    So im hearing all different versions from people. some people are saying that you need to pass a part p exam and become a part p electrician. Ive also heard that thers no such thing that its only a paragraph in the building regs and that anyone can pay a building control for a higher fee or if...
  4. J

    EAL level 3 engineering maintenance electrical

    Hi all, I've just started the course and am in the process of trying to answer the knowledge questions. However am struggling with some of the answers. Has anybody completed these and are able to help. Maybe have there old questions ( god loves a tryer). Or do you know any decent books or...
  5. Pete999

    Pete's Videos Can't sleep? watch this Geezer for 5 mins

  6. Marvo

    Please Explain The Lack Of Brexit

    Is the UK leaving the EU or not? I see court cases, I see votes in parliament. There's talk of a hard Brexit, a soft Brexit, Scotland says they're not allowing it...... Wasn't there a national referendum with a clear majority or did I miss something? Seems like a lot of smoke and mirrors to me...
  7. P

    Explain the difference between a transformer and auto-transformer

    Hi there, I understand that a transformer is used to either step up or step down the supply voltage. I know that the basic principle is that if there are more windings in the primary coil than the secondary coil then, the voltage is stepped down and if there a more windings in the secondary coil...
  8. P

    Please help, I can't explain to my boss ! RCD protection

    Good afternoon gents and ladies. So I am having an argument, I say if I do any work on nearly any circuit, namely lighting and power, commercial I have to upgrade protective devices so the circuit would be up to regs and on this case have either RCBO or RCD, I ask you kindly to help me and...
  9. R

    Please explain this motor plate

    Please could someone explain to me about this motor plate for a pump and why the numbers don't seem to add up, such as why the amps don't correlate with the watts when connected to the nominal voltage. Also what kind and type of protection is needed for the pump. Many thanks.
  10. H

    explain this.....

    So on the test results (see pictures) it states TT system, earth rod, however from the picture of the supply it can be seen that there is a suppliers earth which looks like tncs to me.
  11. P

    Can someone explain Part-P to me.....

    Hi, Basically I've been informed by someone that i need my part P.... Im apprentice trained fully qualified electrician with a gold JIB card, NVQ 3, AM2 17th edition etc etc... and have been working mainly in industrial installations for the last 5 years. I was always under the impressions...
  12. M

    HI,i need to talk to someone for advice as its hard to explain my problem.

    Would someone either give me a phone no. or ring me on 07703987497 to talk about my prob as its hard to explain on the forum.Cheers mackemdave.
  13. M

    Can someone explain this meter setup

    Hi, I moved into my flat today and discovered this meter setup , not had anything like this before, In the flat there are 2 storage heaters and the rest are convectors, these are all wired into the bottom panel and work off the right hand meter along with the shower and the emmersion. The...
  14. W

    Light switch assistance please

    Hi guys, it's my first ever post and i'm probably posting in the wrong place Iv'e just started level 2 at College and i was just wondering if anyone could explain how to wire Light Switches and ceiling roses. When do you use Twin Brown or three core for example ?? Could you explain the Loop...
  15. dez0178

    Can anyone explain the best way to fault find on a ring main.

    Hi, Can anyone help please. I am doing an assignment for college level 3. I am trying too understand how to find a fault on a ring main circuit. I have read about splitting the ring, finding which end has the fault test again until the fault is found. But could anyone explain step by step on how...
  16. B

    Eicr

    Been to do EICR for a letting agent tonight which i do a few for, turns up and the owner has had the painters in.. Well I explain the test and code 1's are serious faults like live cables Etc.. You mean like this as she pulls the kitchen draw out.. The kitchen ring main cut to power a light in...
  17. H

    TV Aerial Setup Advice?

    Hey, I'm looking for some help and advice on our aerial setup across the house as we've got some problems as of today. As far as I can tell our setup looks like this: htt p://i.Upload the image directly to the thread.c om/5ev7tzB.gif (remove the two spaces to see the image, sorry mods but it's the easiest way to explain.)...
  18. vjsmarwick

    a puzzler can anyone explain it ?

    Was at a house tonight that has 15 GU10 led fittings with 1.2W lights. They are in 3 rows of 5 the 2 outside rows are on together and switched from 1 end and work fine. The middle row are 2 way switched but when switched off always have a slight glow ! Any one have any ideas why ? I have...
  19. Floody

    Can someone explain Volts, Amps & Watts

    Ill be honest with you, I dont know what is watt (pun) when it comes to these 3. Id love for someone to be able to explain this in the more easiest way to read you can possibly think of :D I think this wont only benefit me, but alot of us trainees as I know that this question is wanting to be...
  20. M

    need someone to explain what is "Hybrid Solar Inverters"

    what is "Hybrid Solar Inverters"? Does it mean off-grid solar inverter, which is connected to the local grid? I think there must be some difference from traditional off-grid inverters. Anyone who knows pls help me.

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