Fitting an RCBO in a Consumer Unit
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- Опубликовано: 15 май 2024
- A look at a typical RCBO and how it is connected in a consumer unit.
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Someone employ this man to make training videos! Accurate, clear and well thought through.
But his delivery would make me fall asleap......
A man like that could run the country....😊
Mr Ward you have the best teaching voice I have heard in a very long time! Love your videos, very informative, thank you.
John Ward, sincerely a big thank you for the content you provide, you have a clean and no-fluff presentation style and you have saved me from electrocuting myself many times. You are a legend in the game 💪🏻
Hi John, simply the best. no additional explanation needed on any of your videos. I wish you were my college lecturer when I was at college, as I did not understand most of what he said it's only years later through practice I realise what he was trying to explain could have been said so much more in a simple and practical way. Good stuff, all the best.
The best electrical info on RUclips, very clear professional and concise
great video brilliant HD quality. ..And most of all I like your blunt honesty when it comes to cheap crappy anything. ..nice work
Well done John, nicely delivered. Thank you.
john is a great tutor and very easy to understand.
I needed to fit an RCBO filled consumer unit due to lack of space in a small cupboard. I usually fit MCBs, so your video was very helpful = thank you.
Thank you for making these videos, easy to understand and you take the time explain the terms you are using. I will definitely be using RCBO's for my CU.
Brilliant, RCBO's the way to go. thank you Ian
Crickey John,
where were you when i was going through my 1-3 C & G Electrical installations courses? . I'm watching your brilliant videos as a refresher .I'm not actually working as an electrician but in the electronics field. I do this as A DIY hobby. Found your approach and guidance more helpful than reading & spending hours at college.
I'm watching all your videos , i only wanted a quick refresh on SWA. Cheers. regards Del
'Cheapomatic cu from some diy shed'.......love that, you crack me up John! Have to say your videos are excellent matey, keep them coming!
Such a good teacher. Will use rcbos for my DIY solar powered pond project.
Excellent video as always , clear and easy to understand .
Very Educational and well explained thanks for sharing your knowledge. please continue the good work Mr Ward
Amazing tutorial and explanation! Thank You!
Nice one JW, explained perfectly
I never comment but I had to say Exceptional video thank you, explains everything, I can't thank you enough
Great video and your voice is perfect for explaining things. Thanks
What a guy! Brilliant teacher, subbed!
Great explanation especially your discussion of functional earths.
John thanks for the video ,you are the only one I who has actually explained what the white wire is for even though briefly.pity you didn't have one that was long enough to connect.as I have seen these grouped together .and I have seen these individually connect to each relative circuit on the earth bar,what is your take on this? thanks
Double pole switching seems to be common in mini-RCBO’s available in GB this year. Now it’s arc fault detection (AFD) that fattens up the physical size to two slots wide.. and the price to about £120 for a combined RCBO-AFDD. Still, progress is being made!
Thank-you John. Ended up here because i was curious about what the white wire did.
Thank you John very well explained.
Hi John I started watching your channel about a year ago and all I can say is keep it up excellent, easy plain English description by far the the best on RUclips . Just got a question what do you think of the lewden populated 14 way consumer unit with rsbo and should I fit spd . Thanks keep up the good work
I thank you alot john to this fantastic & great video
Hi John, really enjoy your videos. Just wondering what approach do you recomend on say a 3 row CU if the neutral fly lead is to short to reach the neutral bar. Is it acceptable to put ferrule on the fly lead and extend it via a wago connector? Thanks
great videos. very helpful thank you. you make a great teacher.
Thx
For sharing your knowledge.....
Really helpful .
Wonderful explanation, what a great teacher...
These particularly useful for lights circuit in case of any power trips you it won't effect your lights circuit and won't incomplete dark at night. Which could be hazardous.
Thank you for taking the effort to share this. it was very helpful
Thank you for the demonstration,
Hi John I love your videos. If you get time would you be able to make a video on how to crimp lugs? Especially in things like change over switches which all seem to use bolts as connectors so where you need to use lugs to connect to the bolts.
Thanks Mr Ward for the helpful video :-)
Does the above 1P+N RCBO have differential trip indicator..?
Or, is its indicator merely a contact indicator? :-)
Informative video and well presented. 👍
Very clear, thanks JW
Hi J W nice channel, could you shorten the black cable and add a bootlace ferrule or would that be contravening the IEEE Regs?
Hi .. I have only just seen your series of videos. I wish I had these when I was doing my 2391. Thanks
Exellent demo sir.
"El Cheapo"... brilliant, I'm using that one 😁
excellent video, I am impressed
i assume somewhat like a GFI/ AFCI type breaker used in the US. it is interesting that on the UK breakers is more markings of what is going on.
Great tutorial as usual
Hi John,
How do you do inspect & test an RCBO.
Hello..
Can you make a video on what happens to the neutral cable goes back to the substation or whatever in detailed.
John, if you were doing this in your garage for a hybrid inverter, off grid solar. Say you had 2 or 3 rcbo fed circuits, with the functional earth, will it matter if there's a neutral to ground bond or not? I think I want to keep neutral and ground apart due to the grid AC in cable in case of dull days not charging the battery. Any advice greatly appreciated.
Excellent explanation
Hope you train the Mrs in all this good stuff 😎
Good day John...wanted to ask ..say you need to add just one Rcd and the individual circuits will be with RCBO...will the RCD trip as well as the RCBO (if there is a fault) if they are both 30ma? Thanks
I can imagine that RCD testing now using an RCBO for every circuit is going to add a lot more time to the complete testing procedures.
I don't think you have to fit RCBO per circuit, nothing stops you to have the RCBO shown here feed 2 or more circuit breakers/circuits after it..
Great video as usual. Could we have a follow up video on testing with RCBO's?
Excellent video
Very useful info.
Hi John. Good video. I just want to add a circuit breaker. It's a new CU and there is space for additions. Can you advise me?
What's your opinion on the merits of SP RCBOs vs DP RCBOs'. I see that Wylex (Siemens) have single width DP RCBOs. Can't see that there are other manufactures providing single width DP RCBOs.
RCBO is common in China since 10 years back. Their RCBO has an additional square button to indicate if the trip is due to mcb side or RCB function in the event of a tripping.
This is depending on the manufacturer. I've got one made by ABB, if the RCD-part is tripping it's showing a blue "flag". You can see it here on this pic. If you switch it off manually or you've got overload or short circuit (L to N) the flag will not appear:
www.klibo.de/fileadmin/_processed_/b/b/csm_40375243_640_41f6b34423.jpg
Brilliant, Thank you.
At 10:15 you talk about the black lead of the RCBO having the end of the wire being welded into a solid piece, how would shortening the wire and soldering the new end of the wire affect the installation?
When you have RCD's and RCBO's in the same board how do you deal with the live into the devices?
Hello John, fantastic video as usual,
Would you agree that another disadvantage of the RCBO is if it trips, how would you know whether it did it due to overload or due to current leakage?
Disconnecting faulty consumer (i.e. from the socket) which exhibits either kind of the fault can be only class as a partial success (you can change the consumer) as you still don't know what kind of failure it suffers.How quickly and effectively would you recommend to detect it?
Thanks very much,
Great collection of videos,
Kriss.
krisbham probably own multimeter would enable individual power points or lighting circuit testing for megohm readings.
@@austin1722 not much use for the homeowner... 😒
without testing equipment I think there's no way to know. however both problems would require the same solutions implemented anyway, right?
Thank you John. That's me sorted in plain English.
Thanks JW this helps
In KSA we have adopted the US system that is split phase 220 / 110 what confused me is that in my home panel there is no bonding between earth bus and the nutral bus like most panel in usa in fact the earh bus is isolated from the panel. Does the earth work in this condition. Any explanation
Great video John.
Anyway from 9:30 you advice the RCBO's neutral is connected to the main neutral bar and the two RCDs as it were be connected to their own/different neutral bars, reason being it's best the current is kept separate.
My question is the main neutral bar, from wiring standards will definitely have to be looped to the other two neutral bars hence the three neutral bars will be at the same potential, so is it really necessary to put each RCD on different neutral bars????????
Again, in the case where you don't have space to add more neutral bars, what do you do then??????
The three neutral bars are at the same potential, the difference is where the wires go before they get there. Both the line and neutral wires for a particular circuit must pass through the RCD. If the neutral was connected directly, the RCD would sense the full load current on the line, nothing for the neutral and trip with any load.
Well noted.
Can you please do a video on the construction/building of an Automatic Transfer Switch (ATS)?
Bigclivedotcom has done one on those:-
ruclips.net/video/babtv00R-Nc/видео.html
Are the narrow RCBOs even available in other countries than UK or IE? In most of Europe you can't get them. My guess is because they are more expensive, contain electronics, and are usually a single pole, so only disconnect the live. The simpler and cheaper double width modules, usually disconnect both L and N, and usually don't contain electronic, and doesn't require extra functional ground.
I've noticed that Wylex CU's have a slightly offset connection for the line busbar at the main switch (and the RCD's for that matter). This is slightly annoying as it means that the busbars must have an end terminal/tab, offset from the rest. Would be nice for all busbar"tabs" to be in a straight line to give more flexibilty in upgrades - e.g. replacing an RCD controlling 3 MCB's with RCBO's means buying another longer busbar to connect to the main switch when the RCD had been replaced by the RCBO's
can you run two radial circuits on the one rcbo?
Hi John, thanks for the video, I am fitting a new zone 1 bathroom light which requires it to be wired to a 30mA RCD, however there is no space on the consumer unit for another RCD. Am I right in assuming I can replace the current MCB to which the bathroom light is connected with a 30mA RCBO instead of trying to fit an RCD?
Many thanks
Yes, provided it will fit in the consumer unit (RCBOs are usually much taller so there may not be space).
Another option is to fit an RCD fused spur outside the bathroom for the lighting only, or to fit a separate RCD next to the consumer unit for the lighting circuit - existing MCB - short cable to new RCD - connect to existing lighting circuit.
Hi John thank you for the great video as always. On my older CU the main switch is only single pole which isolates the Line side of the mains supply and the main Neutral in is connected directly to a busbar. There is also and RCCB and a second Neutral busbar both of which are populated. My question is does it matter which of these Neutral busbars i connect the RCBO Neutral to. My RCBO does not have the attached Neutral and Earth wires like the one you used in the video
Yes it does matter - the RCBO connects to the same neutral bar as the rest of the circuit breakers, and not the second one which is only for devices covered by the other RCCB.
A single pole main switch is not compliant now, and never was.
@@jwflame Thank you very much John for your reply and clarification , Always enjoy your videos keep up the great work.
Hi John. Great video as per usual but I have have one niggling question, and that is, are there some ones ashes kept in that urn on the shelf in your office?
It's empty, no ashes there or anywhere else.
Thanks John
Hello John, I live remotely and am prone to power cuts. I have a 4kVA generator to get things running again whenever this happens. My problem is the RCBOs trip as soon as I connect the gen. I've put a good dedicated Earth on the generator but to no avail. I'm considering replacing the RCBOs with MCBs but thought I'd first pick your brains. Peter
How are you changing between Generator and Grid Supply, Peter? Changeover Switch?
Type Cs may help. designed for use with motors. Anyone care to comment?
Not a pin but a bootlace ferrule, as the typical pin is not rated for 32A of current flow.
Interesting, as here in South Africa the Heinemann breakers are top entry only, so all the wiring is power in at top and tails at the bottom as opposed to the UK style. Makes for fun with DIN boxes as well, as those RCD devices will not fit here, you need a reversed one.
The normal circuit breakers and RCDs can used in both directions, it doesn't matter if you go in from the upper side and go out on the lower side or the other way arround. Only this style of RCBO demands it to go in from the lower side and go out through the upper side. But standard in Europe is to go into the lower side and go out through the upper side.
Another superb video John,
regarding not shortening the neutral lead on the RCBO, Is it ok to shorten then fit a Ferrule?
ooops... you answered the question at 11min 30sec
Here in Belgium , all RCD's and circuit breakers are dual pole / 3 fase+N in new installations.
Domestic installations in the UK are single phase.
Thanks!
A very interesting video on RCBO’s. I am looking at installing a 50A MCB - Type C (not RCD protected) in my current consumer unit and running a 10mm armoured cable to the garage consumer unit. In the garage I intend to install a 6A RCBO - Type B for lights and a 16A RCBO - Type B for a double power socket (no ring, no spur).
My question is do I install in my garage consumer unit a 40A - Type C MCB for my EV circuit on the basis the EV circuit has a Matt:e RVD Protection Device that switches both live and neutral circuits and if there is a fault. Also, if I fitted a 40A RCBO it would just fight with the RCD protection in the Matt:e Device and it would just be a toss-up which tripped first?
These rcbo devices create extremely high levels of dirty electricity, in turn creates fibromyalgia increases to the suicide rate, hopefully these devices are phased out in the future just stuck with mcbs
Any reason for the pigtails on some RCBOs?
It is recommended to use a torque screwdriver now to tighten the breaker terminals . The torque range is now somtimes printed on the side of the MCB/RCBO .
It's recommended but not mandatory. The reason for the recommendation of a torque screwdriver is not because the screws weren't tighten up too less. Actually some guys tightend the screws too hard and damaged the cases of the MCBs/RCDs or RCBOs. They hadn't their wrist torque calibrated correctly I suppose, it clicked to late ;-P
But I've bought this one here:
www.amazon.co.uk/Wiha-SLIMTORQUE-Starter-18-Pieces-T18-2872/dp/B007TTTRYK/ref=sr_1_12?ie=UTF8&qid=1513385053&sr=8-12&keywords=wiha+vde+torque
But I've ordered it on Amazon.de (german branch of Amazon) because I'm from Germany.
thank you for an informative video
Be awsome if u showed installed a whole fuse box to a house or unit
hi JW, keep up the good work. just
a small question, do we need seperate neutral bars on top for the rcbo's installed within a regular cheap consumer unit ?
+jasdeep singh No, all of the neutral leads connect to the same neutral bar, which is the same one that circuit neutrals connect to when using MCBs. It's therefore very easy to change from MCB to RCBO.
+John Ward thank u sir...
@@jwflame
You cannot mix mcb with rcbo
Also another question, since i notice those RCDs are rated 63A and are followed in the right case by a B40, B32 and B6 breaker. Is that a safe setup or common setup? Combined they overtake the 63A rating although i know the cases in which you would consume at once 79 amps on a circuit are limited. Also i never saw a 100A breaker, here a single phase house is supplied with 32Amps, you get more only on a three phase setup but that requires a different type of panel
Safe and very common - it's the actual loads which matter, not the rating of the individual devices.
someone said to me that the top of breakers is the (IN) and the bottom is the (OUT), you here said the opposite, is there a standard to this or polarity doesn't matter in breakers?
Hi John a great video what happens if you have more rcbo than the main neutral bar holds
Consumer units are supplied with enough terminal holes in the neutral bars and often a few spare, so that situation should never happen. However you can buy the bars separately for most consumer units if for some reason you needed more.
@@jwflame thank you
Sir please tell how to check a original hager MCB? because in the market many seller sells duplicate MCB's with the mark of Hager
nice video.
what about the values written in boxes (6000 & 3) in front of RCBO?
+Tinu Thomas 6000 is the sort circuit capacity (6000 amps), 3 is the energy limiting class, from which the let-through energy in the event of a fault can be obtained.
Would it be acceptable to solder the end of that neutral run to make a nice connection to the N bus bar? I have terrible OCD and couldn’t cope with the untidiness of the extra wire.
No, solder is too soft to use under screw terminals, it tends to flow under pressure which results in a loose connection.
John, thanks for the videos. In the example you give, what size of cable is used to link RCD to circuit breakers and to N bars
It's typically 10mm² or 16mm² and made from a very large number of fine strands. Size depends on the load it will carry in normal use, so the size of the consumer unit, number and type of devices fitted inside are all relevant.
Split load consumer units are supplied with the wires already installed, so it is not something you would normally have to buy separately.
Thank you.
Hi Jon,
if i want to install all RCBO's in my consumer unit, do i need to keep the RCDs that come with the unit?
i've got 19 circuits and want to use a 22 module unit... thanks
No, an RCBO is an RCD and MCB in the same device.
You need a consumer unit with a main switch and as many RCBOs as required.
Nice video ,is RCBo require for AC 1.5Ton in Uk?
Air conditioners don't require RCDs / RCBOs unless the manufacturer states they do. The circuit cable may require one, depending on how it's installed.
Hi John what is your take on trimming down the neutral fly lead or should it be left original length
Can be cut, but if so it will need a terminal crimped on the end, as the wires used are normally very fine ones.
@@jwflame hi John thanks have got a few bg ones and the leads are massive. So just put a boot lace ferrel type crimp on
Very good
Thankyou
220 v 60Hz this breaker is possible?
Hi John. I've always wondered why RCBO's functional neutral CSA are all the same size. I would have thought a 50Amp functional neutral would be larger than a 6A. It's most probably a stupid question. Thanks, James.
I thought the same as you. Did you get answer to this question yet?
@@mixer7586 Cost. Someone in China has been shown how to put a blue wire in a plastic box and tighten it up. They have no idea what they are doing, but if they cut 6" of wire and put it in they get paid. You want to introduce half a dozen different wire sizes? Oh no, cheaper and quicker to jut buy one big roll of wire and that will do.