example

example

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  1. W

    What is an example of functional earth?

    Doing some college work atm and come across a question asking me to provide an example of functional earth. I asked my boss at work but he doesn't even know what it is. The regs says " Earthing of a point or points in a system or in an electrical installation or in equipment for purposes other...
  2. J

    Confused by Scaddan example in Electric Wiring for Domestic Installers

    Hi, I'm a self-build amateur - I'll be running cables and getting system sign-off/inspection by certified competent person, and am just working through circuit design basics. I'm referring to Scaddan's 'Electric Wiring for Domestic Installers' (16th ed for 18th ed IET), which includes example...
  3. Lister1987

    Hotel Design Project - Real example

    For those that have this design project, I figured it would be useful to give an idea of what it may look ok like IRL, so that you have an idea. Rooms will have Thier own board. Cb as main switch, RCD to protect sockets, several radials split over the room, lights (see below) and an MCB for Air...
  4. clanky

    BS7671 : Help Needed on the Example Question

    Hello, I took the opportunity over the lockdown to do 18th Ed course but theres a few bits im struggling with. Because its distance learning, the college i signed up with havent exactly been that helpful. So hopefully someone on here knows the answers! Its to do with the example working out...
  5. James

    A shining example of customer service

    https://www.ladbible.com/community/uk-electricians-pay-boy-wage-after-working-in-his-house-for-six-weeks-20210329
  6. P

    What will V1, V2, V3 and V4 in the example be?

    Hi every one I have a problem which is very simple. I wanted to know what will the voltage on these four spots be. Amperage is not important for me and i don't think there are enough data to find the i1 and i2 on the circuit. Thanks in advance for answering⚘
  7. HappyHippyDad

    Can I use the sheath of the SWA as the CPC in this example?

    Morning.. I have a garage fed by 4mm, 2 core SWA. It is a 25m run from the CU. Can I use the armour as the CPC? The Main house is TT. I have always used 3 core so have not come across this before. i am about to check my notes as I know I have information on this and will find the formula to...
  8. M

    Ferrous enclosure termination example

    Hello all, visit to site today to see in an install of a 315A 400V supply to a machine. Client mentioned previously they were going to use single core AWA cables from the distribution board to the machine so I advised them amongst other things to factor reg 525.1 and how they terminate the...
  9. HappyHippyDad

    Would it be possible to use a changeover switch in this example?

    I am having a play in my shed :). It has a 12v supply fed from a solar panel I have 3 gang light switch which switches the following 1. 4 x 7w LED MR16 downlights. 2. 1 x 12v LED striplight (12w)(the tapelight thingy that just sticks on) 3. 1 x 20W 12v floodlight I basically want to have a...
  10. S

    An Example for us All

    This popped up on my FB page today and I thought it worth posting here, in the hope that the electrician involved may be a member and as an example of how to create that elusive attribute called good will:
  11. pirate

    Just another example of what you find every day

    Yes, it's those damn light fittings again! Really annoyed I didn't get a picture. Anyway, a mate asked me to look at a lighting problem in his house, where a switch put on 2 lights, and the other switch (2 gang) did nothing, whereas he wanted 1 switch to put on center light and one to put on...
  12. M

    Any Smart Meter Installers out there? Need help with example questions

    I am applying for a Smart Meter Installer position and I've managed to get a hold of some example questions for an assessment that is part of the application process. A lot of them are straight forward enough but some of them have me pretty stumped. I'm not sure how you are supposed to know...
  13. MODECSOFT

    Video - Cable size calculation example

    In this video tutorial we demonstrate the steps needed to complete a comprehensive and accurate single cable size calculation using ElectricalOM Software in accordance with BS7671 IET wiring regulations.
  14. D

    Indirect Contact rotection Using RCDs?

    Could anyone please explain why an RCD is needed outside the equipotential zone, how it operates and also why it needs to operate with in a certain specified time ?
  15. FatAlan

    How easy / costly to move one of these?

    Looking at a plot of land with one of these stuck in the middle. How easy / costly would it be to get it re postioned?
  16. M

    Calculating r1 from R1 + R2

    Confused my self calculating r1 or 21 from R1+R2 on a ring circuit did this a while back and compared calculations with measurements to see the differences. but tried the other day think i have muddled the equation! or maybe because its monday haha can someone show me an example
  17. K

    Help with 2365, 305. Task C. Example question

    Hi all, I am currently studying my C&G 2365 and need some help for unit 305. An example question that I have is shown below. I wonder if you could tell me if I am on the right lines and have these correct. I do however not know where to start for b so any help would be greatly appreciated. A...
  18. 1Justin

    Another good example why R1+R2 isn't equal to Zs-Ze.

    Be warned it you are tempted by shortuts. I know in domestic work on old houses, we often have a race against the clock, and it can get stressful and sometimes very difficult, but some cut corners could bite. I have just fixed errors left behind by NIC member who fitted new 17th ed'n consumer...
  19. M

    real example of bills reduced needed

    Hi Chris check out Blue Solar or give them a call on 0161 *** **** They should be able to get you a full design install and commsion for a 4kw system for circa £5000
  20. A

    Believe it or not this example has supposedly been tested and certified!

    To my absolute amazement the DB and all circuits illustrated above have I am informed been tested to 17th edition standard. How many 17th edition problems can you spot here? I am wary of just how many other issues will be discovered when I start doing a few circuit tests of my own! Though I have...

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