In your country, do you use pipe to run wire through very much?

[Mike Johnson]

Why are American video's so long winded, if I needed pre-wired conduit I'd go to Leroy Merlin and buy the pre-loaded flexible they sell and the rubber gland box's for speed, but I don't like them and use UK gland nuts on solid plastic box's.

https://www.leroymerlin.fr/produits/electricite-domotique/rallonge-multiprise-enrouleur-et-cable-electrique/fil-et-cable-electrique-gaine-prefilee-et-cable-internet/?pedagogicalFilters=%7B%22que-recherchez-vous%22%3A%22Gaine%20%C3%A9lectrique%20pr%C3%A9fil%C3%A9e%22%7D&page=1

https://www.leroymerlin.fr/v3/p/produits/boite-d-encastrement-etanche-a-l-air-multicloison-2-poste-s-lexman-e1500205872

https://www.leroymerlin.fr/v3/p/produits/boite-d-encastrement-cloison-pleine-1-poste-s-legrand-e30000

 

[telectrix]

going by OP's pic.,not surprised the USA need sprinklers in new properies when they build them out of highly combustible wood. still, suppose it's amn attempt to save the planet by chopping down trees that pollute the air with oxygen derived from poor old CO2.

 

[Mike Johnson]

Building out of timber in the US also allows the buildings to flex during the hurricane season.

 

[telectrix]

Americans use EMT

ear, metatarsals, throat?

 

[Dustydazzler]

I always thought Emt is America stood for emergency medical technician

 

[Mike Johnson]

Emet means truth in Hebrew, can't think that applies, especially to Trump.

 

[LastManOnline]

That is a nice looking building going up!

I can kind of see the point, EMT is pretty flame containing and it makes inspection easy (EMT yes/no?, not Hmm, is this cable of one of the approved types for this circuit?) but it also looks like a bit of a power-grab by the union, and other cables are quite safe when used appropriately. Still, hopefully least to higher standards than often seen in new builds.

The other think is how often is it fixed wiring that is at fault? I would expect it is the appliances and their flex that cause most fires.

Also another odd difference that I heard from @Megawatt is that USA generally has its GFCI/AFCI at the outlets, where as in the UK/Europe it is normal to have them at the breaker board so they protect the fixed wiring from faults (or limit the risk to DIYers drilling walls for a new shelf) as well as attached equipment.

Don't want to go off topic here but I think that pc1966 has hit on what should be a very, very significant thread "how often has FIXED WIRING caused fires"?

 

[Lucien Nunes]

if we had a lighter gauge steel conduit which could be easily bent with a hand bender and Used grub screw couplers (No more threading) then way more jobs would be done in conduit

In the 20's and 30's, VIR in slip conduit (i.e. unthreaded) was common in UK domestic and light commercial work, with lug-grip and pin-grip fittings. These developed a reputation for not making reliable contact and slip was considered by some writers to be a poor substitute for 'proper' conduit. Some of it was pretty shoddy, and the cheapest tube was not even seam welded and unsuitable for bending. There were some patented fittings that were supposed to give better contact; galvanised tube and fittings would have worked much better but at the time were too expensive.

So there was probably a strong incentive to move on from this inferior conduit system that offered neither the strength and reliable earthing of screwed work, nor the speed and ease of installation of TRS or lead-sheathed (the latter being truly moisture-proof in a way that no slip conduit was).

We had a few proprietary systems a bit like MC, e.g. the Hartley Octopus braided cables, but for whatever reason it was SWA that achieved widespread popularity and adoption into the standards and regs.

 

[davesparks]

there is a system available which uses standard steel conduit and the boxes have plain entries with a set screw to secure the conduit, i think it is called conlok.

It has been used in a couple of buildings locally and I can confirm it looks as bad as it sounds. the connections to the boxes all appear to end up skewed and prone to falling apart with the slightest impact.
[automerge]1599232526[/automerge]
see here for conlok

https://www.demoncato.co.uk/category/conlok-conduit-system/

and they've also come up with 'rollatray' what an amazingly crap looking product that is!

https://www.demoncato.co.uk/rollatray/

 

[LastManOnline]

In domestic situations I've only seen PVC conduit used. Others will be better placed to explain why it is used in every installation, but I always thought the basics were to protect the cable from trowels and also make future repairs or additions more straightforward.

My experience is minimal, but I've replaced cables by pulling through 30 or 40 year old oval conduit and was extremely grateful for it being there.

Yes the pvc pipe will protect from trowels etc but also from chemical damage caused by anything acidic in plaster/cement etc.
Like you up there in N. I. we don't use capping. Also don't know why, but I like it. Looks, easier to install and saves a whole lot of chasing. Chasing walls has come into focus more recently as some engineers are (understandably) unhappy with compromising the integrity of the inner leaf of the cavity. Regarding you point about rewiring it's always an advantage but in reality there is no way the bigger size T&E we now use can be pulled through. Oval conduit is already user unfriendly for rewires. I also don't think it is necessary to allow for future rewires (unless damaged). Pulled out some red and black T&E yesterday (a rare site down here) from the 70,s and it was in mint condition