Just wondering regarding SPDs on TT systems, not so much to do with the short tails but should they be RCD’d on TT anyway as in essence they are a varistor sitting between Line and the TT Earth? Do they do different types of SPD for TN-S, TN-CS and TT? I have seen SPD’s incorporated into isolator switches - I think it is Wylex REC2SPD but I’m unsure if these are suitable for TT should the SPD fail and short L-E.
534.4.6 discusses fault protection even in the event of an SPD failure. In a TT system the installation of SPDs downstream of an R.C.D. can be made. (see figure 16A2 of Appendix 16). 534.4.7 says that where any SPD is positioned on the load side of an R.C.D. an R.C.D. having an immunity to surge currents of at least 3kA 8/20 shall be used. Type S R.C.D.s in accordance with BS EN 61008-1 and 61009-1 satisfy this requirement
You can use spds up stream of RCDs in TT but they have to be setup as shown in this article. Its an old one but explains it well imo. Thanks for getting involved in the comments! electrical-engineering-portal.com/surge-protective-devices-spds-rcd
Great films by you and your crew, great work. The Youth Group Mentoring programme will only succeed if contractors support it, your support is invaluable.
Very impressed with this install and crabtree board. Having no exposed busbar and dp breakers is very nice. That install looks top notch, lots of attention to detail and having a good plumber as well ticks all the boxes. Great watch Mark
Hi Mark. Nice to see you using flexible cable for the mains supply cable. Takes me back to the days of 19.044 & 19.052 cables more flexible. Great work Regards Richard Bragg
Nice to see patch work afterwards goes a long way with the customer. Many don't. We are looking for a new apprentice so if you know anyone local to us in Worcestershire point them in our direction 🙂 Great content thank you keep them coming
Brilliant mate. We have a lot looking round that way! Can I share in the A121 group? If so email to apply on would be perfect. Thanks for the kind comment.
Nice to see every eventuality covered with the time delay rcd and the A RCBO’s ( never felt the need to put one in myself ) but as you said it's a personal thing and if the budget allows why not👍
I got confused with neutral switched RCBO. could you explain it in detail please. I have been installing RCBOs and never came across this term before. is this something only relevant for TT installs? appreciate your content.
Hi mate. Some rcbos do not disconnect the neutral under a fault. In that case if you have an upfront time delayed rcd on a tt install it can also take that as well. Newer rcbos have a switched neutral that disconnects when the rcbo operates isolating the fault. Hope that makes sense. Thanks Mark
Can I ask why you decided to use type A Rcbo's in a posed to type B? The light switched in the bedroom installed behind the doors. Were there placed there because the walls are stud, ease of installation? I really enjoy your uploads. It's really great that you explain as you walk through the installation. What is you pp for a larger kitchen ring or 2 radials? Appreciate your tutorials pal 👍🏻.
Hey mate. The doors are moving around in opening as the refurbishment goes along. So the switches will make more sense then. The RCBOs are still type B on the MCB element but are type A rcd as apposed to type AC that was more traditionally used until a year or two ago. Hope that helps and thanks for getting involved in the comments.
Hi mark was recommended to check you out been out of college for about half a year now I have my level 2 and 3 electrical installation c&g I have about a month experience in domestic full new rewires but the guy I was working with can no longer take me on I want to get my nvq and have a similar role to an apprentice do u or anyone in the comments have any tips on where to find people that need apprentices or company’s I can get in touch with to get back into work I would appreciate it
@@datguy0448 we have a couple of employers looking for apprentices in your area. One a 3rd year level onwards if possible. If you are on instagram DM apprentice121 there and I can send you details etc.
Just wondering regarding SPDs on TT systems, not so much to do with the short tails but should they be RCD’d on TT anyway as in essence they are a varistor sitting between Line and the TT Earth? Do they do different types of SPD for TN-S, TN-CS and TT? I have seen SPD’s incorporated into isolator switches - I think it is Wylex REC2SPD but I’m unsure if these are suitable for TT should the SPD fail and short L-E.
534.4.6 discusses fault protection even in the event of an SPD failure. In a TT system the installation of SPDs downstream of an R.C.D. can be made. (see figure 16A2 of Appendix 16). 534.4.7 says that where any SPD is positioned on the load side of an R.C.D. an R.C.D. having an immunity to surge currents of at least 3kA 8/20 shall be used. Type S R.C.D.s in accordance with BS EN 61008-1 and 61009-1 satisfy this requirement
You can use spds up stream of RCDs in TT but they have to be setup as shown in this article. Its an old one but explains it well imo. Thanks for getting involved in the comments! electrical-engineering-portal.com/surge-protective-devices-spds-rcd
That’s brilliant thanks, SPDs are something I’m not that up to speed on.
Great films by you and your crew, great work.
The Youth Group Mentoring programme will only succeed if contractors support it, your support is invaluable.
I agree Bob! Happy to support in anyway I can
Mark, Interesting film especially for college students, well.done.
Cheers Bob. Very kind, thats the idea!
Nice to see the up front 100m/A timed delayed RCD Mark Looking good
Thanks. I think it makes a difference. Belts and braces lol
Credit were credits due these videos are so much easier to watch with you looking down the camera, top work!
Lol, I am trying! Learning curve. Thanks for the comment
Very impressed with this install and crabtree board.
Having no exposed busbar and dp breakers is very nice.
That install looks top notch, lots of attention to detail and having a good plumber as well ticks all the boxes.
Great watch Mark
Thanks very kind
Hi Mark.
Nice to see you using flexible cable for the mains supply cable.
Takes me back to the days of 19.044 & 19.052 cables more flexible.
Great work
Regards
Richard Bragg
Thanks. Flexi tails are brilliant.
Nice to see patch work afterwards goes a long way with the customer. Many don't.
We are looking for a new apprentice so if you know anyone local to us in Worcestershire point them in our direction 🙂
Great content thank you keep them coming
Brilliant mate. We have a lot looking round that way! Can I share in the A121 group? If so email to apply on would be perfect. Thanks for the kind comment.
@@electrician247 yes feel free to share happy with that. andy@arelectric.co.uk Thanks Mark 👍
Nice to see every eventuality covered with the time delay rcd and the A RCBO’s ( never felt the need to put one in myself ) but as you said it's a personal thing and if the budget allows why not👍
Thank you! Very kind
Crabtree have always made class boards,like the way the breakers push in for contact rather then the other boards with the hit or miss busbar 👍
I was impressed with this one
Good thinking with the board and upfront rcd
Thanks Richard. Made sense to me
Hi, The Electricity Board May let you have a PME Earthing supply for this property free of Charge SSE do here down in Dorset.
The question was asked. No dice
Nice job on the board 😎
Thanks. I tried
Nice one marko "the boss" allison
Cheers Sam.
I got confused with neutral switched RCBO. could you explain it in detail please. I have been installing RCBOs and never came across this term before. is this something only relevant for TT installs? appreciate your content.
Hi mate. Some rcbos do not disconnect the neutral under a fault. In that case if you have an upfront time delayed rcd on a tt install it can also take that as well.
Newer rcbos have a switched neutral that disconnects when the rcbo operates isolating the fault.
Hope that makes sense.
Thanks
Mark
Can I ask why you decided to use type A Rcbo's in a posed to type B? The light switched in the bedroom installed behind the doors. Were there placed there because the walls are stud, ease of installation?
I really enjoy your uploads. It's really great that you explain as you walk through the installation. What is you pp for a larger kitchen ring or 2 radials? Appreciate your tutorials pal 👍🏻.
Hey mate. The doors are moving around in opening as the refurbishment goes along. So the switches will make more sense then.
The RCBOs are still type B on the MCB element but are type A rcd as apposed to type AC that was more traditionally used until a year or two ago.
Hope that helps and thanks for getting involved in the comments.
@@electrician247 Makes sense thanks for the explanations 👍🏻
Hi mark was recommended to check you out been out of college for about half a year now I have my level 2 and 3 electrical installation c&g I have about a month experience in domestic full new rewires but the guy I was working with can no longer take me on I want to get my nvq and have a similar role to an apprentice do u or anyone in the comments have any tips on where to find people that need apprentices or company’s I can get in touch with to get back into work I would appreciate it
Hi Mate, where are you based? Happy to help. Mark
@@electrician247 I’m from Birmingham
@@electrician247 would u recommend a option skills nvq course I already have my level 2 and 3
@@datguy0448 we have a couple of employers looking for apprentices in your area. One a 3rd year level onwards if possible. If you are on instagram DM apprentice121 there and I can send you details etc.
@@electrician247 inboxed you
What sockets are those ? Edit. Oh click
Yep mate click!
I wonder if we will see the apprentice or Mathew working first 😂
Happens rarely lol
If I pop round will you be buying the mcdonalds? 😆😆😆
Anytime Richard.
@Mark Allison Awesome 😎