You’d make a great teacher Tom!

The willy on the notice board lol

I agree that dual rcd aren’t the best but in a court of law you would show them page 36 - 37 of the on site guide which completely contradicts the 2 x regs you said and approves the use of dual rcd boards.

The new camera is sure good, great res and super quality pic! Nice work on the Lighting even got a back light in too! Great content as ever. Full respect

Loving the constant uploads Tom, keep it up!

You and dave savoury are awesome sparks. So informative. Cleared up a few things in my struggles 🙌

I am surprised that dual RCD boards are still being sold with AC RCD's

Great video as always. Totally agree about RCBO's. Spent lot's of time investigating faults with dual RCD boards. Many people do not understand that there are different types of RCD too. Hope to see more of your outside commercial work. All the best from Bill

Very good Tom indeed! Love how you got the LED running lights on the van in the background too👌🏻

This is one of your best videos IMO (as a trainee electrician)! Please create more videos like this and you’ll be getting 👍🏽 on a regular basis from me and others I’m sure 😁

Thanks Tom, excellent explanation

Great explanation and reasoning 👍👍

Have to say that was a brilliant explanation. Keep throwing this sort of video into the mix, and it will help so many people. Thanks.

Thank you for explaining Thomas !👍

Another great video has always Thomas 👍

Interesting video, well done.

Thanks for the clarification.

Excellent video.....

Much appreciated for your efforts in this video and shedding light on.

Great work, great content and couldn't agree with you more Tom. If fitting new protection then why not do it right first time?

That opening shot with the black bucket truck and LED running lights behind you in the bright orange jacket looked so cool!!!

I’m learning more from you than my college teacher and on my last year in college (level 3) :/. Always open to an apprenticeship 😁👍

Often RCD protection is not needed on EV charging circuits if there is RCD protection (usually 6mA) built into the unit itself. A type AC RCD won't trip because the DC current will actually freeze the RCD in place - that's how a no-trip Zs test works. Great video Tom, keep them coming 👍

Love the rant. I feel this

Great video, I personally avoid fitting dual rcd boards for same reasons you mentioned in video (present faults) no rcd prior. After explaining benefits to the client of type A rcbo's boards (future profing/safety) 95% of my clients go ahead with RCBO boards. Fusebox Type 2 SPD loaded whith RCBO's is my standard setup currently.

Great video

Spot on 👍

Nice one mate new subscriber 👌👌

Great and informative video Tom as always. What if you have a TT supply, can you use single pole RCBO's or do you need double pole?

Best sparky content on KZfaq ⚡💪

Totally agree with you Tom. Been fitting Hager Type A RCBO boards for the last 2 years. Won't quote or fit a split load RCD board anymore as I don't think they're fit for purpose. As you say, if the client wants a split load board then I don't want that client

Well done 👍 Technical Tom👍

These videos are very educational.

I love your rants !!!!!

Thank you, I have learnt a lot from this upload, brilliant 😀

I bought a 7 way Fusebox board for my shed and Rcbos. Way overboard for what I need but it was cheap and I know whatever I put in the shed/workshop will be protected. I think it was only £120 for the lot.

Tom. Couldn’t have a better teacher than you matey 👍🏻

Thank You Tom for explaining all that very informative.

Great video 😎

I am amazed that UK has not regulated the AC type out. NZ has been type A for a very long time now and a max of 3 MCB downstream per RCD. I would prefer RCBO as it also has less space as we have to fit double pole version.

Great video, not a sparky but bloody love stuff like this

Good explanation. A single RCD board lead me to have to remotely get an electrician into our house while on holiday after damp and a nicked wire in the garage caused everything to trip out. She suggested and RCBO board to avoid the problem in future and I was happy to pay.

Your spot-on with your RCD comment. I had two fuse boards fitted when the property was rewired back in 1981. When the eldest came along in 1986 I fitted one RCD to supply these consumer unit's (quite expensive at the time). The problem I had being nearly every time the supply switched off and on in quick succession due to a fault in the area, the trip would go off as well and have to be reset. Finaly changed the set-up to one consumer unit last year with RCBO's. It's been tested a few times by external influences and everything still remains on.

I just stopped installing them all together on my rewires, but don't have any call backs on previous installs I done before. I guess it's all about how you install it. One job luckily I installed a RCBO board because an USB socket next to kettle was tripping kitchen sockets and it's only caused the kitchen sockets to trip.

Totally agree Tom, I wouldn't fit anything else than RCBO.

Keep teaching tom your good 👍

Great video as usual, good lesson, but who is the artist up on the right hand corner of the board, Keep up the good work 👍

I only ever fit RCBO boards and with Type A rcd not AC and always chuck in the SPD as well. I simply wont fit type AC or a split-load boards unless there is a very specific requirement.

That was brilliant! Cheers, Onion.

I've tickled your like button. I will be going for a STI test tomorrow :)

I completely agree with your sentiments; protect/isolate each circuit. But if power is lost, a property will be dark regardless of the fuse board contents. Would you be a proponent of battery backup emergency lighting?, it may save Betty in a power outage.

Very educational, thank you.

Great video Tom learnt a lot from it and I think ur right about rcbo is the way especially now that prices for them have come down a lot for them 👍👍

Another advantage with RCBO's is with lightning strike, there's a really small chance of it tripping unlike RCD's who are much more sensitive. In Norway we stopped installing RCD's for 10-12 years ago except for Type B RCD which is mandatory to install with EV's (regulated in 2014) Only when we install a wallcharger with DC filter (Easee Home charger) there's no need for type B RCD

Tom! Anymore info on the mech you teased about a few videos ago!?

Any ideas as to where you can get the mini /compact Crabtree Starbreaker RCBOs at a sensible price? They are about 3 times the figure you mentioned 😕

More of this type of content please

Excellent video dude. Great points well made. I like the fusebox boards they are a decent budget board.

this has been a good video to explain what is a RCBO, make easy ... may be you can come out with a video series "Thomas Nagy Explain"..😀

100% with you Tom. I had our board changed under v17 of the regs a few years ago. We have a fault on one of our circuits. Dual RCD board. Every time it trips we lose our lights. Given what I know know, I would have RCBO board fitted. At the time I had a separate garage board independent of the house because I go out into the empire of dirt and play with stuff. Trips often. Does not effect the house. Also I can turn off the house which then safe while any work is being done in the house. I still have power in the house via an extension and vice versa. Put it another way, why would you not have an RCBO board? Considering the % price of labour against the price of fuse board change how much are you saving?

Spot on 👌👌

Many thanks for that, instructive and enjoyable. This gives me more confidence to discuss what I really want the electrician who will be swapping out my old (fuse-wire cartridge) fusebox with a consumer unit, to supply and fix. Although our house is not a large one, I feel happier with RCBO's-makes sense to me.

here i am still using those old school bottle glass fuses in my house and it works fine.

It's weird that I knew this but didn't know this at the same time... in Australia we don't really see this problem, as only much older places are slapped onto a single rcd. In newer installations to be compliant we must have a 'maximum' of 3 circuits to an rcd and it must be split between lighting and power per rcd. So at a minimum in a new installation, your hws, ac, oven and hot plate ect. are on their own rcbo, but then you would have a couple rcds with power. power, light. (purely because of the price). I'm definitely going to remember this video if I'm ever fault finding in an older place! Thankyou for the video Tom!

Fantastic Mr Nagy 👍👍. Need to to keep up with your videos 😁😁 I’ve Hit the usual 👍

Hi Tom totally loving the channel keep it up but i have one question ..... looking at the top right hand side of your board are you now going to go by Thomas Sagy ???

Great updates on board's

Good video Tom, exactly what I've been saying to customers for years! Question mate, would you be up for giving a chat to some of our learners at Northampton College sometime?

Smiley face got a small winky lol 😂

Grate video Tom! But what with the hidden drawing in the upper right corner of the drawing.

Also, typically double pole on RCBOs so will disconnect the neutral too. :)

Older kettles? How do modern kettles differ?

Great video! Question: is there a benefit if I use RCD enabled power outlets for my home appliances while having the board equipped with RCBO? Would this be a duplication of effort?

Fantastic explanation Tom, really appreciate you and your teams effort that go into these videos. Even though I got my qualifications from college, I've found that content like this is worth its weight in gold. In years to come I can see you in more of a teachers role but if you fancy teaching sooner I'd love to pop down the unit with biscuits 😉 All the best....Postie Jay thats met you a few times 🤣

Completely unrelated but where did you get your jacket? With the cold season here, I'm trying to find a quality jacket/hoodie to wear out in the field.

Great Video, in South Africa we don't have such devices as RCBO's we only have RCD but here it is called an Earth leakage device I have never even seen Dual RCD boards here if something causes nuisance tripping it is just put just after the main switch without earth leakage protection.

As an old retired plumber I have no understanding what you are talking about BUT I really enjoy watching. Thanks for the excellent enjoyable and entertaining content. Good luck with everything you are doing.

Hello Thomas , great item to adress , if you can go into it a bit deaper with diffences fo RCD , RCBO and AFDD's when to use or not to .

Great video, what is your stance on AFDD breakers or combo AFDD/RCBO breakers? Here in the US, just about every circuit requires AFCI (AFDD) breakers, and many things require GFCI as well. I know that the RCBO/RCD is a 30ma trip vs our GFCI at 5ma trip. The GFCI is required for anything wet/damp areas. Also as of 2020 rules require SPDs on all installs here too. 👍 I like our tailless breakers (AFCI/GFCI) that have plug in neutrals as well so there are no tails to wire in for the neutral. Just line/neutral run in and that's it.

3 bed town house built 2013 - can confirm dual RCD board. Something else to add to my list!

RIP Betty Crocker

Great argument Tom, but you have to work within the customers budget. I. like you; think RCBO's are the best. In fact the Wylex combined RCBO/Arc Fault Protection Devices are probably better again and combine that with a Surge Protection Unit and you've got the best money can buy. If i was having a board change and money was no object, i would go for the best money could buy.

Keep up the good work.... 👷‍♂️🧑‍🔧🇧🇩

In the Netherlands the maximum allowed number of circuits per single phase RCD is 4.

Totally agree with your comments on the unsuitability of dual RCD on properties I’ve refused to install them for the last 15 years, if you spend the time go explain in plain English the difference between dual RCD and RCBO’s most people accept the idea of the RCBO boards and pay the extra for them. The big issue of dual RCD boards is then the previous electrician has install the upstairs and downstairs lighting circuits on the old Wylex board with rewireable fuses and has shared a neutral you can’t split the circuits on either of the RCD’s at least with RCBO’s you can keep them on one breaker because all the ring final circuits will be on separate RCBO’s meaning there’s always a lamp that can be used to illuminate their way downstairs

The knob on the board was a classic!

Owing to a small computer infestation, I had RCDs replaced with RCBOs years ago because cumulative earth leakage current was causing nuisance tripping. This will only get worse with more people working from home and the IOT.

It's people like you Tom that get me into shit. I absolutely LOVE your content and the stuff I learn from it scares the absolute crap out of qualified people that I ask to quote for stuff! I had a plumber run a mile because of the knowledge I've gained from Pete Booth aka pb plumber today! It's hilarious how people react when you do research and know a reasonable amount about what your talking about. They genuinely think your a qualified trade or regulator inspector testing them or taking the piss out of them. I love these videos mate, your a legend!

Totally agree.

Betty Crocker must be sick of electricians messing about in her house?

Preaching to the converted, Tom. Love RCBO boards. Quite simply, the faulty circuit will obviously (hopefully)! only take out the RCBO that supplies it. Minimal circuits go down in the house, fair chance most (or enough) lighting will stay on. Straight away, you can see which circuit has caused the trip, potentially leading you into the cause of the problem a bit quicker. With fault finding, trying to find that gitting appliance causing the trip, you are only tripping out the circuit concerned, not half, or all of the house. Recently, friend of mine had a nuisance trip. Always at about 3am. Driving him and missus potty. "Standard" board, one rcd protecting everything. Told him he would have to be very patient and methodical, and basically go into "Sherlock Holmes" mode. Eventually found the prob, a very ancient, tucked away old doorbell psu from previous owner, that hadn't been disconnected. Suggested if he could afford it, get a board upgrade, and all RCBOs. Moved into new house recently, upgraded a few things, put a new board in, all RCBOs. Nice compact board, smaller than old plastic board, even with more circuits! (Intruder alarm used to be spurred off upstairs lights on a 2.5mm cable! - presumably by an alarm engineer). Now on its own circuit. Lots of space to work inside the board, as I chose the "new" compact RCBOs. Love how, when Crabtree launched theirs, they said "same price as the larger ones". Also like them as they provide double pole switching, completely isolating the circuit. Great for testing, and also less nuisance tripping if you are working on an "isolated" circuit, and do the old trip out by accidentally touching the neutral or something like that. The RCBOs are all type Bs. You briefly mentioned surge protection, Tom. It seems to be the current "flavour of the moment". I know a lot of leccies have mixed views on it, and like you say, can also depend on where you are as to if there is a great need for it. There could be an argument that most domestic premises have managed without it for years, so why the compelling need for it now? My thoughts are that if you've got a suitable RCBO populated board, you've probably got a good amount of reasonable protection, certainly the most protection that has been afforded for years. (Think back to double pole rewireable fuses - a miracle if they were wired correctly with the correct fuse wire, or more likely a nail or tin foil in the place of fuse wire). Also another "flavour of the moment" seems to be AFDDs. Again, do you think they offer any realistic extra protection, particularly for domestic premises, or to be cynical, is it a way to just flog a bit more hardware for the consumer unit? I think John Ward has tried to do some "real life" (or as "real life" as possible) tests with AFDDs with some results that might question the claimed effectiveness of these devices. Would you do a chat with your thoughts on surge protection and AFDDs, particularly for domestic premises sometime, Tom? Also why has someone appeared to have drawn a "thingy" on the flipchart?

Could not agree more!

Nice video Tom. 2 things; If you've got someone who already has a dual rcd board, could you move the lighting circuit(s) to outside of the RCDs and just fit RCBO(s) to just the lighting circuit to provide extra discrimination that way? Also it would be helpful for Nagy Weekly to have the episode numbers in the text descriptions rather than just hidden in the thumbnail. Cheers!

I just couldn’t imagine fitting anything less than RCBO’s now. We will see an increase in electronic equipment in houses, driving the requirement for A type’s. You certainly don’t want to be in a situation were type AC RCD’s are blinded by DC leakage. Offering Surge Protection and AFDD’s will also become far more prevalent.

That is why in the Netherlands the regs state that there should me a maximum of 4 circuits behind a RCD in order to prevent nuicance tripping. It is common here to see boards with multiple rcd's. Also the regs recommend that you should divide your circuits in such a way that there is always some light in the vicinity when a circuit or rcd trips.

Have you ever measured the power draw of rcbo's? I've read various specs listing upto a couple of watts each, so a 16 way board with rcbo's would really add up and waste quite a bit. Are there boards where you could have an RCD covering a few mcbs and a switch covering rcbo's for socket circuits?

Nicely explained. My 30 year old safety switches will be replaced with RCBO after Xmas.

I think there is a (slightly backwards) reason to occasionally use RCDs. That is where you've got a circuit that might trip an RCD but you wouldn't notice quickly and it would cause issues if off for a long period. In a similar vein to running the smoke alarms from a lighting circuit because you might turn the alarms off but you wouldn't want to lose the lights. Say you have a sewage processor on its own RCBO, it trips, you don't notice for a week, you've got a week's worth of poo that hasn't been dealt with. Or you've got a garage with freezer. Put that on a radial fed from an RCBO, it trips, no one notices for a few days, melted freezer. If those had also tripped the internet then you might have saved a bunch of smelly stuff. Short of having DBs that have some sort of alarm when a circuit trips, it can occasionally be advantageous to not keep a circuit to itself. Power or phase loss or alarms are a thing, however you have to get over the aversion to fitting non standard things on a DIN rail (which is standard practice in a lot of areas).

Hi Tom< I fit mostly rcbo cu's (fusebox) If I fit dual rcd cu's its has 100a A type rcds and both types have spds in

Its all about price. Even council housing CU upgrades still only want Dual RCD board to comply with 18th Edition. They dont even want SPD installed despite it being mandatory nowadays.