Refitting a School Kitchen EP.1 | Thomas Nagy

Been tasked with retro fitting some LED lights in a school.
(The old lamps were disposed of correctly - Relax)
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This video is for entertainment purposes only. If you use the information from this video for your own projects then you assume complete responsibility for the results.

[@taftse]

What we usually do in schools is put a small sub-board in the practical rooms so that it is easy to reset the RCB's when needed, and we usually have one key switch (instead of the red button) at the teachers desk to turn on and off all power to the students desks, we found the kids loved to mess with the red button too much and it allows the teacher to only allow the students to use the equipment when they switched it on Also thanks for not cutting the data cables the amount of times I had to re run them because someone wasn't thinking ahead Also my electrician recently replaced a few light fixtures for Led's similar to the ones you put up but they had the ability to click in a small emergency pod in the centre of the panel really neat little panels

[@lewistempleman9752]

Great advices 👍🏻👍🏻

[@AbsoluteTVYT]

I completely agree, as a 16 year old student myself. This is how our refurbished science labs are set up (for electrics and gas).

[@acelectricalsecurity]

Those lights are a good idea and very neat, plus they self test as well, good if you don't have a key switch, they are made by Ansell.

[@MaxPlayle]

As a student also, I’d agree. It’s useful to have a sub-board in the practical rooms because if the RCD trips then it’s useful to not have to call facilities management staff to come and reset it at a central location, the teacher present could just flick the switch. Also, the red mushroom buttons weren’t played to too badly where I was, although the option to lock them was there...

[@tcpnetworks]

In Australia - we sub-board EVERYTHING. A 3 phase supply to the room, then a DB with DIN contactors. Neat and tidy, lower-labor fees for yanking cable.

[@loosecannon5813]

With cables above suspended ceilings we need to remember the 'premature collapse' reg.521.10.202 That ceiling will come down in a fire of a good size, that 'spaghetti' is going to be a deadly hazard to firefighters. I believe any retrospective work should include making safe that spaghetti, quote for it at the outset - even if your just replacing 1 light fitting.

[@JCCamp]

loose cannon he did say metal clips...

[@supersparks7770]

loose cannon well done ? I was just about to quote that myself ? Stainless steel zip or not there shouldn’t be any extra weight added to the ceiling fixings as well ? I’ve seen so many false ceilings collapse due this sort of thing

[@pault4793]

Correct we need remenber 521.10.202 , unfortunately you need to quote whats on the spec on not forward think, (subject to if you observe a C1, you need to win the work THEN on the 1st site visit let the client know and get as a extra, it you cost in work at tender stage not on the spec you will lose the work , as others will go for a extra after winning the job

[@edcooper2396]

What do you do about the deadly spaghetti that is the collapsed ceiling?

[@jonnywilson9117]

@@edcooper2396 that would be on the floor. The same can't be said about the wiring.

[@tommyk_ketchup]

speaking as someone who fits data cabling, just want to say thank you for coiling them up and not just cutting them off 🥳

[@davepusey]

Agreed, but if he didn't mark which socket they originally went to then you've still got to retrace them out again?

[@tommyk_ketchup]

decent tone and probe will make it easy enough to identify the cables, easier than re-running anyhow! although most people will want to upgrade their cabling these days anyway so probably be a new run of cat 6a and just use em as a pull rope 🙁

[@Xenon777_]

As for those LED emergency lights, it's best to run those non-maintained. When running in maintained they would usually stay on 24/7 like the one in the background at 17:11. When the LEDs are running 24/7 they will soon reach their rated lifetime which is usually around 30,000 hours. I'd say LED emergency lights are acceptable for using in non-maintained mode but for maintained, I'd still use the fluorescent ones because they of course have replaceable tubes. When the LED ones reach the end of their life the whole fitting will have to be replaced rather than a simple change of tube.

[@DanielAntonsen94]

Mounted the same type of LED panels in Norway as well, love them. You can also mount them in roofs with a tiny housing where you just slide it in.

[@williamcross3904]

Great video Tom. Something to watch during this lockdown!!! Looks like one of them jobs that leads to more work the access control stuff looks interesting.

[@skiathosmobi]

Great presentation, easygoing, no stress 👍👍

[@Raysnature]

Retrofitted those exact panels in a church hall a little while back. Love em.

[@deltalambda3864]

i installed one of those klick connectors in our dining room for the low hanging light above the table so when we have parties or loads of people around the table gets moved aside and the pendant gets unhooked. the downlighters keep the place lit.

[@aaronhudson6704]

Hi I'm always watching your videos you've inspired me to become a electrician keep up the good work

[@Cardetailingburnley]

Glad you have got the job you have bloody worked hard for it.

[@taylor22270]

I’ve got 3 of those panels in my garage and 2 in my shed..super clean light and easy to fit

[@GreenHawkConstructionltd]

Great video as usual I must admit watching your videos have inspired me to start my own channel for my construction company keep up the good work

[@considerlizards]

Go for it

[@cameronboyd6063]

Love the fresh trim lad

[@andrewyeo2353]

In self isolation from mrs and she shouted through plasterboard wall nagy has got a new one so straight on the you tube thanks for entertaining tom

[@RyanMoodGAMING]

Love the videos, keep up the great work

[@davepusey]

We have those LED panels in our office at work. Been there about 5 years now without any issues. Some of my collegues have had issues with glare from the light directly above them, and we've found the connector between the panel and the driver is really handy as it means you can independently disable individual panels without affecting the rest of the grid.

[@paulmorrey733]

Thanks Tom

[@affy675]

Nice job that, we do lots of schools, your EM Stop button will need to have a key lock off so the teacher can leave the room locked off when they leave. We usually pull a new sub main to the kitchen and have a local db in the kitchen. Going off track we tend to put T&E in dado trunking as some of the kids like to pull lid off and cut singles with scissors 😑

[@JimWhitaker]

You should not be interfering with Darwin!

[@Malandrin]

haircut, and nice el-work as always mate!

[@paulharrison6408]

That's Rehau trunking! Good stuff and lot cheaper than Marshall tuflex etc. Also bottom lid is part of the carcass so negates need to fit bottom lid as per other makes!! Saves time as a result. We used to get ours from Bemco wholesalers

[@calumclark1719]

The NVC LED Pannels are really good and easy to work with

[@mp45code]

Quick comment on cable selection: if allowed by local code some kind of multicore wire (e.g. Oelflex 12g0.75mm², higher count if you need returns for "on" indication) might be making sense for the contactor switches (shared supply) and also the emergency switch (dedicated pair). If you are concerned about the insulation put into a flex tube. Saves time and space. Makes everythin very neat because you run one cable from the control box to your contactor box.

[@seanmac2384]

Rehau is a 5 min walk from my house. Just might add, their trunking is quality

[@arslanelectration6306]

Good job sir ♥️

[@jaykhan4739]

Grate video Tom

[@fatpedro5588]

Thomas Nagy's Price It Right 👍🏻

[@johndowney8575]

I miss the flicker😂😂

[@9plusinstalaciones]

Hahahaahaha

[@seventeanine9066]

I'm single now but when i wasn't i use to flickher alot

[@djwazz07]

With regards to cable on ceiling grid, you can buy ceiling grid clips that sit on the grid and have a plastic top that can hold upto 8 cables (maybe more if needed) we used then on a university in Liverpool

[@skamuk1]

AT&T(GB) in Brentford stock that Rehau trunking mate, and they're still open to the public, just closed on Saturdays now. Recently fitted a load of it.

[@skamuk1]

If you're floating around near Old Street tomorrow I'm pretty sure I've got a spare one on site you can have.

[@lukekens6495]

Nice work

[@jamescrowder1931]

Hi tom I've used that rehau stuff before I got mine through electric centre which Is basically a part of edmundsons

[@mfselectrical6370]

Nice 👍 it’s a good idea to get a secondary fixing on stuff sitting in the grid in schools something like gripples usually they panels come with little right angle brackets got called to a school years ago where the kid had been whacked on the leg with a speaker tile after they’d been messing about with a ball made a right mess of the lads leg spent about 3 days adding gripples to everything in the school. And Rehau is a rexel brand might be worth a quick call to see if they can source you an end cap

[@micsen9]

Those CP3 Emergency terminals are quite nice you can set them up with both internal summer and 10 second delay timer if you have fire alarm signal on the Access control system. Also they are resettable which is awesome. Edit: It also turns red when triggered

[@pault4793]

Looked like a 72KVA intake ,a lot of primary schools have that size but not with a home ecomonics room, if its a secondary school seems pretty tight inatke size Use 32a Radials 4.0mm in LFS twin & earth forget rings, have done loads in the london schools, with diversity its down to experience, throw away that on site guide table, extremely unlikey that all hobs / ovens would be on , ventilation never a problem, all the best Tom Also i would consider a seperate board in the intake with i1 main contactor to bring on the board or 2no: 63A 4 pole contactor set up ( subject to design ) and a single stop/start by teachers desk, very rare for independant switches to control each circuit, bit of a waste and overkill in my opinion 4k -5 K value, All the best tom

[@garethg2501]

Them LED grid fittings can be fit with a battery backup, turning them into emergency lights. These are far brighter than the bulkhead lights and neatens up the ceiling more. Very easy to do as well

[@NicholasBrownC]

I recently installed some very similar 2'x4' LED fixtures in an elementary school here in the US. Interesting to see that y'all aren't required to safety wire the fixtures to the ceiling with steel wire, and can just lay them in the grid. In my state it's required that each fixture have a minimum of two safety wires to hold the fixtures in case the ceiling grid collapses. I think it's kind of silly with the light weight LED fixtures, but it makes plenty of sense for the older florescence fixtures. Those things are heavy!

[@9plusinstalaciones]

As for the cabling on the ceiling grid, I'd mention it to the client.

[@rossmurdoch7870]

You could run a 3 phase supply up to the room and install a little Control panel housing all the contactors, RCBOs, emergency switches etc.A little more design and MCP cost but wiring would be a doddle. I would do Radials to each appliance and a ring for the sockets as normal. It would be easy to get a cost for a little panel purpose built for the job.

[@joey06051988]

Hi Tom, I would put a seperate Distribution Board in a corner in the kitchen which would feed the entire kitchen, including sockets etc.. Every hob would be on their own circuit and the contactors with the emergency push button on theirs. Price wise it could be around £4k. Looking forward to see the end result. They are removing the sockets to prevent kids from charging their phones/devices. Cheers.

[@asmolbean9300]

Gotta love Docklands, it's my favourite part of the city tbh.

[@thomasnagy]

I like it too. Its a little 'rough and tumble' but it has a really down to earth feel. Not all parts but for the majority; i like east London

[@IBlaineee]

Alternative to thw bulkheads in a room like that we would just fit some emergency led panels.. Just the same as you fitted but you buy an additional emergency pack.

[@danfenlon173]

TOM Have a look at the 3w emergency spotlights, I always fit them in grids now, 100000 X neater than bulkheads.

[@philip426]

Just noticed the label on the DB of who the electrical contractor was & the state of the wiring is actually neat for them.

[@paulharrison6408]

No need to use maintenance free connectors before the driver. Connect the flex from the klik box straight into the driver . Much quicker and means 1 less joint plusxsaves on materials. Been doing it for last year or so. As long as the flex is no thicker than 0.75mm which pre made kliks are....then you're sorted mate.

[@mikeenglish1492]

Rehau Profila Compact, we use it all the time and get it no problem from Edmundsons Carlisle. Your branch should be able to source it from another branch in the Edmundsons group. Nice vid, interesting as usual👍

[@djdunc]

Nice to see someone else from Carlisle following Tom!

[@robholmes2381]

The paxton door system they have with the emergency exits we use at our school. Its setup so the emergency buttons if pressed trigger a relay on the Paxton system so it emails us. A lot of places don't even alarm them so you can simply press it and walk out! We're yet to find another school with a similar setup.

[@guffermeister]

I really like the paxton door system

[@paulmcfadyen689]

Rehau is a plastics manufacturer here in Scotland. Tbh I thought they only made uPVC window profiles but that's where that trunking comes from it seems

[@HeathenGeek]

00:00 ooh somebody's been watchin Edgar Wright movies for editing tips 🙂🙂 For the cables I think I would have left them over the grid. The ceiling should be fire rated? plus there's the metal grid to prevent premature collapse? And I think it would be safer. If there was a risk of premature collapse, it would look like sorting that out would be a seperate job. But I'm sitting at a keyboard and not at the job so don't have a clue.

[@Xenon777_]

T8s are what were in the ceiling lights and the fluorescent emergency lights use T5 tubes

[@davey6024]

That van is a beast tom. The back of mine looks like I had an epileptic fit in the back of the wholesalers and knocked over every shelving unit.

[@krisrickson853]

Couldn't of thought of any other example of how much of a shit hole your van is? Would you rip the piss into a downsyndrome or a diabetic etc? Arsehole let's hope you never get diagnosed with epilepsy and you have to stop working because they take your driving licence

[@mertguzel3878]

Best electiran ever

[@domacios]

I sugest push buttons with indicator light for contactors. Also enclosure with some sound isolation would be a good thing. Clients like silence operation of stuff you install, just an idea...

[@stuartthespark]

Hope you get the work, looks like an interesting install. You may have already designed the control panel. I was wondering are you going to use relays and spring return grid switches so when the emergency button is released, that all 8 contactors don't slam close at the same time. I would space out the contactors in a control panel with ventilation.

[@stefanwatson85]

Did a load of this kinda work at the NIC EIC main office and that’s all they wanted us to do, lash it across the ceiling...

[@jamesdaly4040]

Installed loads of commercial lighting all over uk we usually try to put the click connectors within 2meters of the lights but it can look messy.

[@LSF315]

Good video here, Tom and am looking forward to part two. (Don't think I heard you cuss once!)

[@banusbaby]

Them led panels actually get quite warm once they have been on a while, I try to place the driver and connection box on an adjoining tile if possible

[@sheargillsparkie9588]

I know we can all see you grafting away on the jobs you choose to portray on you tube, but I must say how impressed I am at the condition in which your tools, (and your whole van for that matter) are kept - being in such mint condition. Has lockdown availed you more time with which to keep them mint and much more organised than your average joe spark? Good show!

[@thomasnagy]

Nope, that's how I roll!

[@davidellis4218]

You can link the L1 and L in the bulkhead to make it maintained btw

[@ajhealy2917]

In Australia it is againts the regs (Illegal) to tie cables or anything to floating ceiling hangers, you have to mount Cat Wires across the roof void and tie everything to those

[@pricey4566]

Exactly my thoughts aj but its funny watching how the poms work it blows my mind australia seems to have a better standard in my opinion than alot of other countries LOL all

[@scottsparky1]

There's a good scrap value on those Ali reflectors. And also those tiles look like plaster board tiles which need to go in a specific skip

[@pjttaylor7186]

I got a batch of 58 of those, I have the best-iluminated loft and some mates have wonderful garage n shed lighting now waste not want not

[@peto22]

Use 24vdc contactors, only one control cable for grid switches eg. ölflex 12x0.75

[@laurencehucker6912]

i'd use a multicore YY for the gridswitch/EM stop by the door. feed the gridswitch itself through the em stop button so it breaks the feed to every contactor in one go. also means you only have to pull one cable up to the gridswitch. Also maybe 4mm radials for each station?

[@lukephillips1011]

Fancy seeing you here! I agree, good idea 👍

[@Luki1060]

Laurence Hucker you know I was sitting thinking how I would connect the e stop to all the contactors for separate circuits, but that works perfect! Is it ok to use the same feed for a1 of each contactor? Thanks!

[@tlangdon12]

If you need a way to connect the return from the EM stop to the common of each gridswitch, you could do worse that look at the Phoenix Contacts Distribution Block (e.g. P/N 3002758).

[@nickbuckle646]

YY Should not be used for fixed wiring/final circuits. I think that was a change in the 18th, same goes for SY. Give it a google, the problem seems to be B.S 7671 does not recognize them being manufactured to a Britsh Standard, think they made to a German spec.

[@TheMattSturgeon]

@@nickbuckle646 cable not being to a BS can be covered by declaring a deviation from BS7671 on the installation certificate. That would apply to NYY (hi tough) too in addition to SY and YY, although I wouldn't be surprised if there's actually a BS that they happen to comply with... There's another reg on not using flexible cable for fixed wiring too, but it doesn't apply to control circuits, so contactors should be ok. EDIT: might be worth reading articles such as this, as there is certainly more to the argument www.whyprysmian.co.uk/sy-yy-cy-cable.html

[@redcrow2006]

Fitted some of that trunking in work not long ago. Pretty sure it came from RS Components.

[@landy9020]

That dado trunking looks very similar to Schneider dado let me know if it is but certainly looks the same.

[@garethhodson3896]

Bet those Eaton RCBO’s won’t be cheap? LSF cable as it’s a school, have to watch the phasing and loads on the ovens too. - run a multicore to the switch put the common through the em stop first sounds like a nice job £1k materials £2.5k labour plus VAT but probably double that for London and lockdown work

[@olayontour8198]

Under DT class room regs require minimum of one E-Stop per wall easily accessible

[@craig926]

Alright mate just asking have you heard of the emergency panel pods? Basically it’s a small pod that fits on top the panel which means you don’t need the bulkheads mounted on the surface of the ceiling tiles. Gives off a good amount of light in emergency mode and a very nice neat finish! Great vid mate keep it up. 👍🏼

[@Wedelfreak]

That trunking is made by "OBO", so maybe try looking in that direction?

[@PaulL42654]

AC in every tool? Damn wish my school would have had that!

[@ARElectrics]

How you are going to do that job you have priced for is exactly how I would had thought to do it, spot on. I estimate the job would be roughly £5,500 plus VAT. I wouldn't do it any different to how you explained. What a great job. What light panels are they I do recognise those, only thing to be careful of is how thin they are, iv known some to sag in the middle over time. Do they come pre flexed aswel? Only thing I would probably do differently is that I would had wired the flex directly from the klick into the driver. That way the only connections are at the driver and at the klick plug. These are great in commercial premises where isolating a circuit isnt possible, you can just unplug the fitting for maintenance purposes. Not alot that can be done with the cabling from the klick boxes though. Sometimes you got to be careful you dont price yourself out of the work.

[@county5]

Looked like an adt Minerva fire panel to me it’s no walk in the park from my experience but like everything a disaster the first time but gets easier after that

[@davepusey]

I hope you marked the ends of the data cables with their original socket IDs. As someone who works in IT, this is one of the most frustrating things when data cabling is cut or disconnected but not marked as to where it previously went.

[@djseanie10o]

Rehau was the best dado to fit ever so handy and cheap enough but they have stopped manufacturing, we had to switch to MK dado

[@CallumWK]

Those break glasses are very cool... Also - if you do get a the fire alarm, i think their voids need protection 🤔

[@bourneelectricalable]

At the start of the video you see an i/o unit on wall connected to a fireray 5000 controller I think so probably higher out of shot there was a beam detector.

[@Growis83]

There's beam detection in the void he's working in.

[@pauljones908]

I would install a DB in the room fed via a contactor installed within the incomer section fed 16mm 5 core SWA (depending on loading) abd controlled with a lockable E stop at the teachers desk. This should prevent having all 8 circuits being fed through the same contactor enclosure preventing the danger when working on 1 contactor. Id put a 2A MCB on the auxiliary circuit to protect it. Like someone mentioned before id go for a 4mm T+E LSF radial to each station and keep 1 row on the same phase to prevent 400V between the 2 work stations.. although this will leave 1 phase with a higher load should they have a full class. I couldnt properly see but the 250A main switch is usually a switch disconector BSEN60947-3 so the 250A rating is the maximum current it can break when switching? Unless its a BSEN60947-2 which is an MCCB so it should have a dial underneath the switch at 0.8 - 1 x? Usually the incomer fuses are at 200A for a 250A switch disconnector so will probably need to check first. Ideally probably could have done with a load test when the school is open to check what its current load demand is before installing. Hope it helps and good luck

[@daniellovett3126]

Good luck with the fire panel Closed protocol adt panel 😂

[@123tinhat123]

Plus most schools are usually picky about who services the fire alarms usually done in house or a reputable fire alarm company, not a one man band.

[@tjunwin106]

Sounds good, We would put a local DB in the room with a shunt trip main switch so when the EM buttons are pressed it kills the whole DB, you could put a splitter box on that and have the contractors in there, always found this is quicker and uses less T&E and less labour having longer cable pulls! Also have you priced for LSF cable with it being a school/Public building ?

[@rattlehead85]

Nice Vid Tom!! 👍🏻👍🏻 The issue with the wiring on the grid ceiling is indeed a question of how far do you go? I’d ensure my cables were supported with metal tie wraps for the time being and report back like you said that you have found cables which are not adequately supported against collapse in the event of fire which is a potential risk to firefighters who may have to enter. (Get that documented to!) At least you do have some basket and cable management up there though...better than most places! What is the KW rating of one of them hobs that the client is supplying? Ideally they need to be running on 13a plug tops otherwise above 3kw each will need its own separate dedicated circuit which will be a ball ache with wiring. If they are on plug tops I’d wire a 10a circuit in 1.5 through a lockable mushroom button onto the grid switches...then back down to contractors. For the rings I’d run 6mm singles from each 32a Mcb to the supply side of each contractor then the ring cables from the load side of each in t&e up to sockets for each set up. 👌🏻

[@SirEngelmann]

The printing on the trunking is partially written in german. It says "Unterteil" which translates to "bottom part". I think that if you search for it at german distributors you may be able to find it. I am not at all an expert, so I can't guarantee that it is actually available there. Hope it helps, Greetings from germany

[@danielking1478]

Fire

[@alexcantley9137]

I'm thinking 5 days £5800 including the day you spent modifying the trunkings and the led lights and allowing a day for board work and testing My only thought is key switches to isolate with separate neons so you can tell when each circuit is energised

[@tomorichard]

New submain into classroom new basket hung from Perlins within classroom. BAnk of contactors fed via same circuit through multiple key switches Key operated em stop button controlling feed to contactors. Drop to key switch and stop button in steel conduit with switch wires contained in multi core flex.

[@daanwilmer]

Pricing a commercial job as someone who isn't quite used to thinking in those terms is quite difficult, and the actual price is probably several times higher than I initially expected, but still a very fair price (just outside of what I'm used to). As my initial hunch was around 2 grand, a better price would probably be somewhere in the ₤10,000 to ₤20,000 range.

[@ryanwatson6135]

I think that trunking is from newey and eyre from what i remember

[@Rose.Of.Hizaki]

🎶🎶🎶 Schoooooooools out for corona!!! 🎶🎶 🎸🎸

[@stevenflanigan9558]

Hi mate just a heads up on the fire alarm panel for future, it’s an addressable adt panel so hard to get the sortware for laptop programming unless you know someone who works/used to work for adt. If you come across faults with devices etc you would need to get adt to programme the heads with address etc which they charge a pretty penny to do. Hope this is of help mate.

[@danielchurchill7928]

Would go for roughly about 6k, maybe suggest some extraction on top of that as well.

[@markhendry2050]

Keep clear of the fire alarm,old adt Minerva closed protocol.Also the devices eg smokes heats call points are hard to acquire.

[@charleskevill6246]

If possible could you do a how to series? I'm a bms electrical apprentice. So as you can guess I dont do anything involving lightning systems, Or fire alarm. Or perhaps explain the basics as you would if you were teaching someone. Awesome video by the way.

[@Bin216]

It’s food technology, not home economics. When was that build done originally? The school I work in was built in 1999; all the 3 compartment trunk through the entire build was all bought in cheap as it was being discontinued. The school maintenance staff didn’t find out until several years later when some of it was smashed and the spare parts left on site at the end of the build had started to run out. The particular system they used has 3 parts which clip in to cover each junction, and are now super brittle (the lid and boxes for the centre section seem to be fairly common to lots of 3 compartment trunk, but all the other parts seem completely unobtainable).

[@paulyh4531]

That trunking is made by same company that makes double glazing units , perhaps that sort of firm would stock it ?

[@laurencebrown9204]

A bit of extract wouldn’t go amiss in there

[@dj_paultuk7052]

LED's do generate alot of heat. Hence why they have a Aluminium backplate. Personally i would try to keep the transformer block away from the rear of each panel. Given they will reach 60-70c.

[@garyusher5688]

Hi Tom, like the idea of remote switching for safety, how do you get involved with quoting for this type of work, do you need to be on an approved list with the council?

[@AraCarrano]

Great Video. Release the dimensions for the track and perhaps a viewer with fire rated filament can 3D print one for you.

[@vernanok1677]

Dunno about in Euro, but here in the states. Each light is supposed to have 2 points of support. (we use ceiling wire, labeled separately for the electricians) And we support the wires off that, as we arnt allowed to use other trades support. If you wanted you should have charged them to do that. Cause right now that craps not gonna fly, Literally. :p

[@markwilliams4274]

Ha ha, I did my Electrical Maintenance Engineer apprenticeship with Rehau.

[@user-or1lu3ku3m]

Here in the US when I'm pulling network cable I've only seen metal flex tubes going to each light, those klik connectors seem like overkill in that application to me