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...
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...
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...
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⚘
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...
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...
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...
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:
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...
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...
moosemaster
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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.
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
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...
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
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...
andybird
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Can somebody help me with the below please?
A raidial socket outlet circuit is suplied by 2.5mm cable and is 20M long. Given the Ze of the instalation is 0.43Ω and that the resistivty of the cable is 7.41Ω/m at 20c, what is the calculated ZS?
Working on a big house belonging to a boss of a billion £ building company
There is a dual rcd in the house feeding a dual rcd in the poolroom ,my boss said to provide two double sockets for the builders/site and gives us 2 rcd sockets, now we have 3 rcds in series. The site foreman goes to the...
Solar Funding Scheme Launched
Receive up to £10,000 from government scheme, funding available for installation
The Solar Funding Scheme is now available to homes in England and Wales for the installation of solar PV panels.
Under the scheme you can install with no up-front cost, allowing you...
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