SPURS AND ZS ON RING CIRCUITS - CAN I SPUR - HOW MANY SPURS - DOES ZS CHANGE - FUSED & UNFUSED SPURS
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- Опубликовано: 2 июн 2023
- This LearnElectrics video is about spurs on ring circuits. It’s a short video about a simple approach to understanding this important aspect of our work as electricians and also looks at how Zs might change for certain spurs.
There are always lots of questions on the internet, in chat rooms and in comments boxes about spurs.
How many sockets are permitted? For example.
What is the difference between un-fused and fused spurs and why does it matter?
If I can have a double socket then why can’t I have two single sockets? A difficult thing for many, to accept. And … does Zs change, and so on.
And the reason for this video, a recent question, … why are some drawings in technical books so complicated?
This is video number 203 and to view all our videos type in LearnElectrics all one word into the RUclips search bar.
Visit our RUclips channel where we have many more videos on a wide range of electrical topics.
🎉 this video cleared all of my doubts
Fantastic. Happy that it helped, its done its job. Dave.
Once again the love the content of your videos 👏🏼👏🏼👏🏼
Nice feedback. Very much appreciated.
Excellent video once again. Thanks a lot for taking the time to do this it’s much appreciated!
Glad it was useful and thanks for watching.
Thank you so much Dave as always very informative.
Very welcome Anthony, thanks for your support.
Another great video ….! keep it up Dave👍
Thanks, I'm doing my best. Lots more to come, spread the word. Dave.
Just started my Journey to become a Domestic Electrical installer, really struggled learning from the text book sent out to me. I'm funding this course out of my own pocket and I've really been struggling to get my 10 hours (study/ learning) in a week on top of my full time job. You cant imagine how much of a godsend you have been for me. Everytime I get lost in my books I come to your channel and I understand it everytime after watching. Thankyou so much for the work you do. 🤘🏻
Really nice of you to let me know Benjamin. Keep watching. If you go to LearnElectrics.com there is a search box there and typing in a search word will show you all the relevant videos with direct links to them. Stick with it buddy, don't expect overnight success, build up your experience at every opportunity. Make yourself some practice boards and build different circuits, anything. Its a good trade to be in, its taken me around the world several times. Dave.
5 years ago (when I was 29 yo), I started on the same journey you are embarking on. I have been a qualified electrician for roughly 5 months now and still watch these videos myself. Keep it up, and good luck 👍
As always brilliant concise thanks much appreciated
Thank you Steve, appreciated feedback. Thanks for watching. Dave.
Excellent videos, very helpful thank you.
Thanks for the feedback, appreciated.
Great breakdown. Thanks.
Glad it was helpful Daniel, thanks for the feedback, appreciated. Dave.
Your videos are absolutely brilliant. Thank you so much for taking the time to make them.
Glad you like them Ivan. Thanks for watching, lots more to come. Dave.
That's a great video. Thank you so much
Glad you liked it, lots more to come. Dave.
Thank you Dave. Great video
Thanks for watching, more to come. Dave.
Thanks Dave--excellent explanation-
Thank you David, thanks for the support. Dave.
Many thanks! Super useful as always.
Great response, thank you. Dave.
Excellent explanation. I had this argument with a guy in my local only yesterday. And he insisted that I was wrong and I don’t know what I’m talking about. He was telling me he just fitted three new sockets in his living room and it was easy he came off an existing socket , i tried to explain to him that he can’t do it like that. And on its went till I got annoyed with him. Some people just don’t like being wrong . Can’t wait to see him in the week and show him this video . I just know he will still say I’m wrong and the video is wrong .I’m just to soft hearted and like to help people even when they are beyond help.
Another brilliant video Dave as always 👍
Kindly pay attention that this limitation is for ring circuits which are rare in buildings. For radial socket circuits you can have more than one socket in a branch.
That is often the case Sean. I've learnt to walk away over the years. There are plenty of folk out there who do want to learn and do want to do it right. Thanks for watching. Dave.
Ring circuits very common in the UK Sajad. A similar video on Radial circuits is in progress. Thanks for watching.
Great Video
Thank you and thanks for watching.
Excellent 👍
Thank you Brian, great support as always. Dave.
God bless you!!!
Thank you, glad it was useful to you. Dave.
Great video Dave. I suppose if your spurring off a ring that’s nearing its maximum 80% Zs of 1.1 ohms (it would be a big ring, I know!!) then in theory fitting a fcu with a 13A fuse, basically gives you a higher Zs for compliance at the extremity of the circuit. Food for thought!! Thanks Dave👍👍
That's one way of looking at it and there are other ways to solve the Zs problem too. Thanks for watching. Dave.
Outstanding video again Dave. I wasn't aware that you can't come off the Ccu with a DSO without a FCU. A lot of text books show that you can. Why is it they say that you can't nowadays. Surely it is the same as coming off anywhere on the ring
Good practice to protect the single T/E cable. Yes, you're right, many books do show it and it is the electrician's choice. I don't like spurring in 4mm if there are already two 2.5mm conductors in the hole. Thanks for the input. Dave.
Nice video! But what about a switched spur coming of the ring and controlling the supply to the kitchen LEDs with a 3A fuse. Can that switch be used regularly to switch the LEDs on and off ? Technically I don't see the problem, but there might be something I don't know
A switched FCU as you explain is ok. As with all switches, check the switching capacity which will be shown inside the switch, often marked as 10A.
Excellent vid.reading from fuse zs is always higher how to write it on certificate?
Thanks
Use the comments column or write it on the back of the certificate. See comments ... etc. Thanks for watching. Dave.
Hi. If I used 4mm T&E to spur off a ring circuit consisting of 2.5mm T&E could I then add as many sockets as I wanted to without incorporating a 13 amp fused unit?
It wouldn't then comply with wiring regs guidance. Personally, I always follow what the book says and fit an FCU. Thanks for watching. Dave.
Zs is the key......
Thanks for watching. Appreciated.