Lighting Circuits Part 2 - Wiring Multiple Switches, 2 way and Intermediates

[@rogerarbery9850]

The rare ability of an individual to impart complicated instructions in its simplistic form to the masses ,most of whom like myself find this electrical world a mystery. Teachers out there please note , this is how you teach , now no longer a mystery , many thanks from a grateful student

[@danielteyehuago1633]

Exactly

[@alitheoneandonly]

So useful 6 years later. I’m in college doing electrical installation and I’m always 1 step ahead because of your videos. Thank you so much!

[@jayp913]

JW I am not an electrician but like to learn and know how things work. I have tried for so long to understand how lighting circuits and especially two way lighting works. This series really explains it in plain simple English and is worth its weight in gold. Thank you so much for putting this up, along with your other content; it's brilliant. Keep it up mate and thanks again!

[@TheJask101]

I love the dig at the end there , brilliant !

[@KevinPughCM]

Super clear videos. Much appreciated. Thank you for taking the time to make and share them.

[@shaun27ful]

Hi thank you for this video I'm not a qualified electrician but I know the basics and multiple way switching can get a bit confusing thank you so much for your video I always like your videos please keep them coming

[@grahamd4764]

Same here. I have been working with electrics since I was twelve but not paper qualified.

[@frankhorisk3485]

My house has a landing light controlled by 5 switches. One downstairs and one outside each of the 4 doors opening onto the said landing.

[@adamrmorris]

Still a useful video 4 years later, as usual the clear and matter of fact style is both informative and practical - thanks JW 👍

[@Simon_Portillo]

that is the best explanation on 2 way and intermediate switching I have seen!

[@akey69er]

Seriously why aren't lectures more like you? Everything seems a lot more simple than they were ever explained to me before

[@benbaselet2026]

It's rare to find people who know their field very well but still can lecture to complete newbies without skipping important details or jumping back and forth etc. If everyone in the education business was this good the world would be a better place.

[@Mr.Therapist1]

I know!

[@reubzswain5821]

Agreed! Explanations are so easy to understand...

[@superbadiii4856]

Love the sarcasm at the end. In the name of safety let’s swap all the cable colours around.

[@randomj6188]

Hi John Just started my electrical course a couple of weeks ago and your videos are a massive help in understanding all the different parts involved. I was worried I wouldn't understand switches but you have made it so simple to comprehend, Many thanks and keep up the good work. Its all very much appreciated.

[@malk6277]

Thank you: tremendously helpful. Brown, Black, Grey... WHHHHYYYYY !?!?

[@alanporter2694]

Thank you john, you are a great teacher. I have always wanted to understand electrical lighting cicuits and you bring much needed clarity to my knowledge on the subject. Best regards.

[@andyeeeeie]

Cheers JW you’re great simple, clear and very helpful

[@HolywellFilms]

FABULOUS... I would like to go back to college now with you as my lecture. 😁👍

[@benandchrisdivers8512]

Brilliant videos. If you aren't already, I think you'd make an excellent tutor at a college.

[@harispapastathis2985]

This helped me understand how circuits with intermediate switches work. Thank you.

[@ColinRichardson]

I had seen both method 1 (conduit) and method 2 (house style) and always wondered why would they even do that.. (yes, I am watching a video of something I already knew) Method 1 always seemed easier to understand and uses less cabling.. Why would anyone use method 2?? It wasn't until I seen the way that John drawn it I had the 'AHA' moment and noticed Method 2 works better when power goes to the light, but just before being wired in, the switch is (kinda) like a spur. (Not really, but it's how I am going to remember it) But Method 1 works when the power comes from Location A, gets a switch along the way, but the light is in Location B, and the light will just be connected to neutral in whatever way it wants.

[@bobholmes4215]

Brilliant. Struggled with this for years and now totally clear. Thank you. 30 minutes of my day well spent.

[@JasonSmith-yb3ci]

Fantastic instructional mate! Your my go to to refresh and learn. Keep up the fantastic work, it's greatly appreciated!

[@whitehorse7587]

Dear John, -- I think important correction, You should be saying Red, YELLOW, BLUE which then become Brown Black Grey ... Granted this matters less in this specific (lighting) case as that usually relates to swapping over L1/L2, but still I think from point of view of discussing official colour change this is a problem. E.g. when talking 3-phases, this will reverse the phase-order... Essentially this is (as I see it) factually incorrect. Hope that helps!.

[@jwflame]

Yes, no idea why the order ended up as red-blue-yellow at the left side of the page.

[@sbusweb]

I'd like to suggest you use the youtube text-overlay-facility to point this out briefly in the video, with many thanks!.

[@ronniedove5297]

3 days of going mad over some simple wiring and at 12:21 in this video at last I solved it. Many thanks

[@jess.hawkins]

Brb just gonna make me a 52-switched light fitting :D

[@trueriver1950]

Cool. One switch for every week of the year makes a lot of sense

[@lucianlazar8865]

Thanks

[@leegreveson]

I should have revised this video this morning. What I thought would be a straightforward consumer unit upgrade had turned into a baptism of fire. Having to change all connection as neutrals were being switched instead of line, then on a two way light the Single core cables, all red, not descenrable from each other could not fathom what was going on, not getting readings as expected, one switch worked, other didn't, hair loss was inevitable till I plumbed for switch must be faulty. Unsurprisingly, switch was faulty. Lesson learned, go round checking all accessories before I start!!! So now we're leaving the EU, can we go back to our original colours, especially red, white and blue for 3 core, how patriotic. Oh yes, great videos John.

[@jivanchavda176]

Lee Greveson h

[@CbrigBear87]

Yes! Patriotic sparkies I can handle.

[@loosecannon5813]

No reverse from Europe, brexit or no-brexit, a group called CENELEC is quietly standardising all our electrics.

[@andrewhaines3259]

Quite some years ago, I had a garage, with a single light, operated by a single switch by the rear door. I wanted to add a switch to be able to turn the light on from the main garage door. My then boss, tried various ways of explaining how to do this, but to no avail! I just didn't get it. This video has made it very clear how it should be done. If only the Internet and KZbin had existed then, and I still had the garage.........!

[@AZTechLabs]

BEST EXPLANATION EVER. Now you know how logic gates work in computer chips kids. :)

[@grahamd4764]

You can turn you light on from fifty different switches ...lol!!

[@heronimousbrapson863]

In Canada, the one way switches have an "on" position indicated on the switch handle, wheras the 2 way and intermediate ones don't. I'm not sure if the wiring code permits 2 way and intermediate switches to be used in one way applications.

[@TheChipmunk2008]

I wondered how you were going to do the grey.. well played sir!

[@faikhawrami]

Really you have got a talent to give lectures..we are looking at your video here in Iraq

[@andrewpiper2908]

Mr Ward. You are an absolute gangster of the electrical education world. I absolutely love your videos. Thank you very much sir.

[@g7eit]

Such a simple way of explaining how this works. Great work.

[@themunchkinbear]

What a fantastic video. As a non-electrician I’ve never really considered how the circuits actually work. Any time I’ve had to replace a switch I’ve just continuity tested the switches and replaced like for like.

[@stephenvjoseph]

I'm so glad KZbin recommended your channel to me. You are so knowledgable, I get to learn something new every time I watch your channel.:)

[@richardzambrano4659]

Hi there, your video is very helpful. I wonder if you could help me with a question. I recently installed a dimmer switch in a circuit with two switches to control the lights in a room from two different points. The dimmer is a 2-way switch and works fine. However, if the dimmer is off the other switch doesn't switch on the lights. On the other hand if the dimmer is on I can switch off the lights from the other switch, but can't switch them on again with the dimmer. According to the instructions it should work fine. I installed the same dimmer in other rooms and they work fine but they are only a single point which makes it simple.

[@martinporter8569]

What a talented instructor. Cheers.

[@WizardFondler]

Thank you for not using marker on paper... until 23:30 that noise haunts me! Otherwise amazing information!

[@Jackzuk]

One of my light switch are red blue and white, was driving me mad as to why, so thanks for explaining.

[@RavenLuni]

To be glued to the screen for half an hour while my brain fills with new knowledge. Its a rare talent to be able to provide that. Thankyou.

[@warrengray610]

when john is drawing the system it shows the possible states, 1-way=2states, and 4 states with the two-way example, good work john,

[@LeiChat]

Thanks for this series. Cheeky request: Please could you do a video that combines the 2 way wiring and the ceiling rose wiring from Part 1? The light on our landing has a rose with 3 blues, 3 browns and 1 blue with brown sleeve + 1 brown. The switch on the landing has Com: black (brown sleeve), L1 two browns, L2 grey (brown sleeve) + blue (brown sleeve) The switch in the hall has Com: black (brown sleeve), L1 one brown, L2 one grey (brown sleeve) The switch wiring seems to match what's shown in the V3 section in this video kzbin.info/www/bejne/paHSdqath9WSoMk but I'd like to understand how those wires link up to the ceiling rose.

[@fillyfresh]

Black and Blue. Red and Brown sauce. Good way to remember which corrosponds to which. Thanks for the videos :)

[@rickgalbraith2752]

That last wiring example with the two switch setup I found to be just plain weird. I don't really think we use it in Canada. The other thing I found in another video was rating 2.5 mm2 wire at 26 amps. 2.5mm2 wire is between our 12awg and 14 awg wire. Where 14awg is the skinnier wire which is rated at 15 amp and 12awg is rated at 20 amp in Canada. The 15 amp circuit at 120 volts is the common one, whereas the 20 amp circuit is just coming into use for kitchen appliances, because the former standard was split 15amp circuit for kitchen use. The split circuit could actually give 240 volts across the two hot wires, so the duplex outlet was split - a joiner bar was broken off that connected the two hot terminals. A special two-pole breaker was used which turned off both hot lines simultaneously. Wiring for that outlet was white for neutral, black for one hot line and red for the other, or two separate cables with white and black. Ground(earth) in Canadian wiring is a bare copper wire usually or occasionally a green conductor. The split circuits met their demise with more use of the GFCI (RCD) outlets. So a 20 amp version of the outlet became available. Actually, the outlets were always rated at 20 amps, but a plug that is used on an item requiring 20 amps is slightly different, with the neutral pin being turned 90 degrees. The outlet is configured so it can take either the 15 amp or the 20 amp plug.

[@groovejet77]

Wow! Thank you! 🤯

[@p-techkh9443]

Hello, I thank you very much for this video

[@roberthallas349]

Hi John, I hope you are still doing your KZbin videos, I have a question, I want to control five led wall lights, with individual switches, with two two way light switches, first of all, is this feasible and safe ( from the consumer unit, fused at six amps ) and secondly, this is off grid, do you think that this will work ok. Many thanks for any advice that you can give. I am now going to look through any other videos that you have posted. Once again, thank you.

[@runbou3019]

អគុណបងthank👍👏

[@MikeWmusic10]

Thanks for this John, helped me sort out a 'two way' switch that had been wrong for years. Gave me an idea for a video suggestion, any tips on how to figure out where old wires are going where in a building without ripping them all out of the wall?

[@garybeckett4461]

Part 1 vid .. i came away with clear understanding. Part 2 vid .. i did not find so clear. Would love to say make yur vids clearer John but have been thru comments. Looks like its me not u. I need to rewatch .. suspect more complexity in this vid. Thanks anyway.

[@PapaCuppa]

Obligatory thank you comment as at this point I'm binging your videos

[@justintemp]

Sorry for the random question but are upstairs lights usually connected in series, in one, then out to next light? Noticed bathroom spots not working and room ceiling rose. Other room spots are working.. Could be bulbs but if one bulb goes does that mean rest of lights further down that circuit wont work?

[@AlexofSmeg]

The way you speak is amusing. raising the pitch/tone at the end of every sentence you say. Do you speak like that all the time? like down at pub chatting about football with mates for example?

[@buleetu]

Hi everyone I have a new vanity mirror in my bathroom I used twin and earth wire blue and brown in this country and ran the line from above the sink where the mirror is up the wall and across the ceiling to the main bathroom light There were 2 brown wires together going into a connector and the main bathroom light brown wire connected to it on the opposite side of the connector. And 2 blue wires together going into a connector and the main lights blue wire connected to these on the opposite side of the connector the same way as above. So I connected my new mirror light into the main bathroom lights side of the connector matching the colours brown to brown and blue to blue But now I can't switch the mirror light on and off without the main bathroom light being on What did I do wrong?? I know I probably worded this question way too much for you pros because I think this is a very simple task for you guys but is it just a matter of putting the neutral wire separate from the line coming in from the switch? And if so how do I do it? Many thanks for any advice I might get

[@industrial.inoxidable]

Hello Friend. I am in a project to make a cnc table. I still have to wire the race limit switches that go to the card. I have a diagram of the card and the limits. You can help me ? I can send it to you by email. I would greatly appreciate it

[@Bodragon]

"Intermediate" switches also known as "crossovers". Well, that's what I was taught back in the seventies.

[@MsTommyknocker]

Why are the 3-way switches called "correspondence switches" in Scandinavian countries??

[@1414141x]

Yes, I thought it might be because of Europe. Perhaps we can go back to the red and black when we have loosened our ties with Europe !

[@johnmehaffey9953]

My mate was a time served electrician and he had to stop working due to ill health but he was always helping people out and one day asked me to take him to a friends house where the local residents association had rewired the house, he put the hall light on and the landing lights came on and vice versa and then the upstairs switch that turned the landing lights off and on didn’t work, the first thing he did was draw a diagram of how they should work and then had a look to see how it was wired, half an hour later and half a roll of wiring and it was sorted and the reason why we needed to rewire was he found a screw through the conduit and plastered over, me I made the tea I’d the most important job that day and it was a freebie

[@capt.usamasaid8582]

It's a valuable lecture, many thanks

[@KLiCuk1]

This is GOLD ! Thank you

[@johnsimonson7206]

Recently started electrical installation in college and have found your videos invaluable. Thank you.

[@nomadicsoul34]

Mr Ward you are a fantastic teacher ! thank you .

[@ArcMediaFilms]

Hi JW great video thanks. With the strappers on a 2 way switch could L1 from one two way switch be linked to L2 on the other 2 way switch? Or should the strappers go from L1 on one switch to L1 on the other switch ? Thanks Glenn

[@jwflame]

They would normally go L1-L1 and L2-L2. If L1-L2 then it will still work, but the light will be on when both switches are off or both are on, rather than the more usual arrangement where the light is on if the switches are in different positions.

[@reedy8585]

So how does a 2 way dimmer switch work ? and would there be any issue having 1 dimmer switch and 1 toggle switch controlling a single light fitting ?

[@jwflame]

The switch wiring is exactly the same as in the video. The only minor item with a dimmer and a normal switch is that the other switch is only on/off, so, the light can only be turned on/off at whatever the dimmer is set to.

[@poorboymechanic5280]

In a word ; Superb!!

[@simeonpalenzuela9241]

I am in the Philippines and am grateful that I can watch video from Mr John Ward an expert in electrical from the UK. Thanks sir.

[@garyoa1]

And of course if you find black, blue and white... you need a multi meter.

[@christopherclark8293]

As an Aussie, I find the dead pan English delivery funny to listen to! But damn man, this is one of the best tutes I’ve ever seen. Well done!

[@MS-Patriot2]

@Christopher Clark - John is a legend. He was invited to lecture at a college and they almost made him smile. My favourite electrics guru.

[@badbanano]

Old trolley system used to switch neutrals to save wire in. A knob and tube system.

[@theravedaddy]

lol! the WHITE wire....commonly used in thailand, it can be live or neutral or earth although if it starts out as an earth it wont be one when it reaches a socket. they rarely connect it past the consumer board.

[@georgezama]

If you don't mind me asking, where are the neutral and earth wires placed in this positions? Thank you very much for uploading these informative and helpful videos! Kind regards, George

[@jwflame]

Earth is taken to all points, light fittings and switches included. Neutrals can be take to the light fittings only, or to both the switches and the lights. Although the basic switches in this example don't require a neutral, it's useful to have a neutral there for installing smart switches in the future. N&E connections covered in this video: kzbin.info/www/bejne/mp_Th2puZshpidk

[@brandonmifsud2619]

I am using a relay with my raspberry pi to switch on and off a bulb. I have an idea in my mind but I don't know if this will work or not. My idea is to use a relay switch with a 2 way 1 gang switch. As you know, 1 of the switches will have the live connected to the common and the other switch with the bulb connected to the common. I want to connect the common of the relay with the common of the switch and the NO/NC with the bulb so if the switch is off I can still turn on the bulb using the relay. With the idea if I cannot pass from the door I can pass from the window. Will I burn the relay if I have the relay on and switches on together?

[@jwflame]

That's fine - the relay contacts are just the equivalent of another switch. Doesn't matter if one, both or none are switched on.

[@stebeardX]

good video, well presented. only pick up would be order of colours RED, YELLOW, BLUE to BROWN, BLACK, GREY just so not to get confused when wiring 3 phase.

[@shaunsautorepairs5410]

thats very interesting i didnt realise you could use the two way switches backwards using three core cable. i have always used them in the tradional way but you need to use four core cable which you did not mention. two lives,neutral and earth. very clearly explained though. thanks

[@KazKasozi]

Great and clear explanations. I also find it interesting that there's an organ in your workshop!

[@240soundwave]

So the ceiling rose is the same as a junction box? What is confusing me is why in this video there is no neutral. If your lights are connected to the junction box already an you want to add a switch you have to run it to the junction box as well right? and not to the other switch like in this video. Any thoughts from anyone would be appreciated, I don't want it to go bang bang.

[@pineappleroad]

A ceiling rose is kinda like a light fixture with a built in junction box And in the UK the wire is generally run directly between the switches

[@trueriver1950]

4:20. Not that unlikely, in my opinion, to want three places to control a light. In the house where I grew up we had a hall that could be enter from the front, the back, or from upstairs. There were no switches by the front door, but it could be controlled from the back or the top. When you entered from the front you had to stumble in the dark to the other end of the hallway This was the standard wiring for zillions of similar houses built and wired in the thirties, but it would have been much more convenient to have a switch at top and front and back. We did eventually get that, and I'll tell you a story about that if you look at my reply to this comment

[@trueriver1950]

When I was 9 or so we were rewired to upgrade the 1930's electrics after the power in my bedroom was condemned (it didn't have an earth, would you believe and when my parents called in an electrician for something else, that electrician explained why that matters.) That first spark gave a price for the job he had been called in for, and a price for a full rewire be done rather than fixing the immediate fault. Safety standards had moved on since the house was built and the rubber based insulation was not considered safe any more (or was past the end of its safe life perhaps?). He suggested not doing the piecemeal repair and charged a small call out for the advice, refundable if he got the rewire contract. He didn't actually get the full contract and I'll explain why. My father decided if it was going to be a big job he wanted several quotes. One of the other sparks that came was very friendly to me and started answering my incessant questions and wouldn't let Dad shut me up. Because I was already a precocious child, I asked the friendly electrician could we have three switches to control the hall lights instead I of just two. My Dad said "That's not possible, surely?" but the spark said "actually it is" and turning to me asked if I knew what the name of the extra switch was. I didn't, I just knew my friend's house had one line that. He said the extra switch was called an intermediate switch and promised to explain how it worked IF my parents gave him the work: looking at my Dad as he said that. Of course they did give him the job. I still don't know if his price was the best, but even if it was it's not why he got the job While he was working at our house he showed a natural desire to teach, but I only realised as an adult that that might also have been a useful sales technique when he came across proud parents ;) He not only honoured his promise but brought a 6V battery and a 6V bulb in a holder and wired it up for me to play with, using the real switches that were going to be installed in our house. It's simple: you already understand the two way switch, the intermediate just swaps over the wires that context the two way switches. And he never once complained when I followed him round asking questions. He even claimed he needed my help to turn the handle on the megger* though he sensibly wouldn't let me touch any of the real wires at any time. It's not a good habit, he said, for untrained people. *In the sixties a megger was powered by rotating a crank rather than internal batteries. At least his was. He explained what it did, too. Just goes to show that knowing the regs is only part of what gets the work. And my guess is that JW would get that sort of job for the same reason. To teach well you have to love doing it.

[@thesmarttrader9980]

This is best video I’ve watched this year. Thanks a lot Boss

[@hannahswann747]

I am South African and your dry English humour about mixing up the "dull" new colours to create a "big bang" tickled me. Beggars belief that .Gov implemented someone's dim idea to increase risk throughout UK by changing what wasn't broken?! I simply can't fathom that one. I have no problem grasping your very lovely lessons, though. Thank you! xox

[@charliemarie4360]

We called the first method the strapping wire method.

[@ojukwusixtus3076]

This teaching is a topnotch, you made it so simple, I couldn't drop my phone till the end. truly you are a great Teacher, thanks to @Robert of Access Academy, another electrical guru who recommended your channel to us, his student.

[@gooddeedsleadto7499]

In my building the upstairs light only turns on when the downstairs & upstairs switch is in down position. Rest of the combinations keep the upstairs light off. How should I determine which switch is bad, upstairs or downstairs switch? Thankful for explaining it so well.

[@TonyP9279]

Here in the U.S., what you call the 2-way switch, we call a 3-way switch and your intermediate switch a 4-way switch.

[@johnspallen3132]

jw rocks again explaining stuff to simply, wish u were about when I was an apprentice in the early 80s. Still enjoy your videos 📹 john ( northern Ireland)

[@sil-ly4yj]

John - thanks for these videos. The best I have seen so far. I get the concept but I don't quite get how to extend the concept to multi gangs. In my bedroom I want a 3-gang (1-main light, 2-bedside lamp A, 3- bedside lamp B) a 2-gang (1-main light, 2-bedside lamp A) and another 2-gang(1-main light,2, bedside lamp B). I can't find a way to wire all the 2-ways together. I understand that all of these will be 2-ways. However I can't get all the wiring diagram right.

[@huseinkerkuk]

too long for me,,any way thank you

[@UndisputableFact]

At 18:39 why does it not cause a problem with the line doubling back on itself and causing a loop? Doesn’t it short circuit or anything?

[@piratedprivacy9052]

Its all within the same/nearly as same potential when it comes to feeding a Permanent Line(phase) & connecting it up to Load-Points. Even with any worst scenario Wiring Mismatch within Switching Configuration Network, no short circuit normally occur. It merely fail to function, or perform abnormally...

[@jamesgrimwood1285]

This really really confused me as a kid. I just couldn't figure out how two switches could control one light. That there could be other switch arrangements than a SPST type was a whole new concept the first time I took one to bits.

[@AxelMontaner]

In the conversion method you instruct that the switch 1 connections should be connected to the corresponding switch 2 connections. For clarity, imagine a face: Switch 1's nose connects to switch 2's nose (common 1 to common 2). However, you have switch 1's "Left Eye" connected to Switch 2's "Right Eye". Is this correct? If it were "corresponding", the figure should look like this - : X : - with wires crossing over the common wire. Please clarify.

[@jstone1211]

I agree with the many comments below. Showing an electrical schematic clearly shows HOW and WHY each wire is connected to a specific terminal. Those vids that show just the wiring confuses people IMO. As an electrical engineer (retired) turned electrician I have always shown this type of schematic. I know they understand the connections after being confused. Great vid.

[@niallers8572]

you forgot to mention that green only was the old earth as apposed to green and yellow nowadays. keep up the good work john nice videos, could you make a video of you playing the organ and also how do you feel about the brexit? :)

[@jamesmyrthong6112]

Thank You John. You simplified the complex one in details. Thanks from India🇮🇳.

[@boramalivecable]

very bad explaination even no name wire

[@arvo56]

I just fitted a second switch in my garage,-was fed up fumbling in the dark,-so I followed John's 2nd method[above] in this video,- works perfectly, easy to follow, so thanks John!

[@makiem713]

Explained better than most electricians here

[@stellarandrews9538]

How stupid, How can you say it’s less common too use 3 switches ? It’s very common in house with 3 floors. Long hallways or as in Spain most people have a switch either side of the bed And main switch near the room door. Personally I’ve got 3 switches powering main light and 4 lamps in the sitting room.

[@PhilReynoldsLondonGeek]

I have two-way switching in my bedroom - and there is a spare box by my side of the bed (there is a switch the other side). There is no wiring in the spare box or I would have looked into three-way switching. As it is I now have remotely controlled LED bulbs in both fittings, enabling control from my side of the bed.

[@hionmaiden663]

Hello John, just a suggestion, in order to help people understand the switch connections, how about labelling the connections on your drawings. As you have drawn them side-on instead of top to top. In this case L1 is at the top, L2 at the bottom. Where the confusion can occur is with the Inter Switch; is L1 on the top and L2 on the bottom, or is L1 on the left with L2 on the right? As your drawing shows L1 to L1 and L2 to L2. However if the Inter Switch is L1 left and L2 right that means L1 to L1 and L2 to L1. I recently installed an Inter Switch and wired up L1 to L1 and L2 to L2, it did not work, the two original switches did; but the Inter did not. What if? what if the drawing is on the side as shown that makes L1 to L1 and L2 to L1, so I swapped the wires over on the Inter so that S1's L1/L2 went to L1 and S2's L1/L2 went to L2......It worked! Wire Colours.....Must admit that is exactly how I assessed the new wire colours Red = Brown, Blue = Black (because black was 'N' before becoming blue) and Yellow = Grey.

[@johnschlesinger2009]

One minor quibble. The phase rotation using the old colours was red, yellow, blue. You reversed yellow and blue on this video. A very clear explanation of switching arrangements. Students will be helped by this.