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2.5mm flat cable with a sleeved CPC

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I recall seeing this a long time ago. Is it still available? Anyone know.
 
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LastManOnline said:
Rewires are a pain... period. In truth it would be rare to get 2 legs of the UK t&e through 20mm pipe (unless it's round rather than oval). But what I do is pull a single leg through and try and plan the circuit so that particular socket ends up as the last point on the radial
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Pretty much standard practice up here to use round conduit bushed into boxes.
 
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nicebutdim said:
New installations should have no down side, other than increased cost.

Where I could see it being a real pain is rewires. Pulling two legs of Irish 2.5 T&E through 20mm conduit isn't going to happen.
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The cost may not increase, as if it makes the job quicker labour times are reduced.
 
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I built a house in Phuket, Thailand a few years back.

They have as standard a flat T&E with insulated CPC, in horrible American colors, made locally and called 'Three core'. It's surprisingly good quality.

Apparently this is a common configuration in Asia.

[ElectriciansForums.net] 2.5mm flat cable with a sleeved CPC
 
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ipf said:
Twin and earth cable, 6242Y, with smaller cpc, has never been produced as such.
6193Y with 3 cores of the same size and insulated earth is available and meets the ROI requirements, I believe.
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It only meets I.S. 10101 Rules now if the I.S. 201-4 cable is to Dca, -a2, s2, d2 or higher standard. (LSF cable essentially.)
 
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pc1966 said:
I would be genuinly interested to know what the reasoning/justification was for ROI adopting the same size of CPC and pushing up costs. Anyone know?
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My assumption is that it was for increased harmonisation with European and other worldwide practices. It's probably fair to say that the reduced cross-sectional area cpc is a bit of a UK anomoly, notwithstanding the inherent safety of it where disconnection times are met (although it will result in higher touch voltages).
 
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Risteard said:
My assumption is that it was for increased harmonisation with European and other worldwide practices. It's probably fair to say that the reduced cross-sectional area cpc is a bit of a UK anomaly, notwithstanding the inherent safety of it where disconnection times are met (although it will result in higher touch voltages).
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I guess harmonisation is the most likely reason. It often explains decisions that don't strictly make sense but make life easier for someone else (e.g. cable manufacturers).

I'm not sure the touch voltage difference matters much in practice, as the usual specification is 0.4s for TN earthing where you would imagine a fraction (50% to 80%-ish) of Uo being present on metal objects during a fault, and 0.2s for TT when to all intents and purposes you get the full Uo supply present.

But the reality is any circuit using MCBs for OCPD, and that is going to be every new domestic install and the vast majority of commercial/industrial final circuits, is going to clear in 0.02s or less if it meets the ADS specification at all.
 
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pc1966 said:
I'm not sure the touch voltage difference matters much in practice,
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I have the impression the CPC was reduced in T&E to accommodate British ring circuits. With 32A mcb and cable that is 5mm in total, the reduced CPC is fine as it is doubled, also with two ways back to the CU.
 
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My reasoning was the ring circuit prompted it, to get cable cheaper, and smaller so easier to fit. In an installation 2.5mm cable is used more than any other. Keeping the cost of that down alone helps in the overall costs of an installation. Then they threw the rest in.
 
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Intoelectrics said:
I use metric for precision and imperial for rough measuring. e.g. a 2400 x 1200 sheet board I call an 8" x 4"
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One of my annoyances (there are many !) is that if you actually measure a sheet of board, it's often nearer 2440 x 1220 mm... but sold as 2400 x 1200 mm. The reason of course is that it's actually 8' x 4' !

I'm hoping that post EU, we will legally be able to use imperial sizes where they are relevant.
 
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DPG said:
Strange attitude again.
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You are out your depth conversing with graduate engineers - many here clearly are unable to see advantages of anything new. Outside of Cyberworld, I probably would not speak to you much in a professional capacity. You would be firmly told and directed what to do, with your input not wanted or ignored. That is not to say hands on electricians cannot add value - after a while you know the ones to talk to, and those you tell what to do.
 
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John-SJW said:
You are out your depth conversing with graduate engineers - many here clearly are unable to see advantages of anything new. Outside of Cyberworld, I probably would not speak to you much in a professional capacity. You would be firmly told and directed what to do, with your input not wanted or ignored. That is not to say hands on electricians cannot add value - after a while you know the ones to talk to, and those you tell what to do.
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That's a tall pedestal you have put yourself on John, you clearly have issues.
 
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John-SJW said:
You are out your depth conversing with graduate engineers - many here clearly are unable to see advantages of anything new. Outside of Cyberworld, I probably would not speak to you much in a professional capacity. You would be firmly told and directed what to do, with your input not wanted or ignored. That is not to say hands on electricians cannot add value - after a while you know the ones to talk to, and those you tell what to do.
Click to expand...

You know nothing of my background, so let's keep things on track.

Your attitude is what I have an issue with, not your technical knowledge or experience. This alone tells me all that I need to know about you, along with your post above.
 
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DPG said:
You know nothing of my background, so let's keep things on track.

Your attitude is what I have an issue with, not your technical knowledge or experience. This alone tells me all that I need to know about you, along with your post above.
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I care not a hoot what you think about my attitude. If you want to discuss that go to a PM with me. You are just clutter and noise on the thread. Far too many of them here.
 
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Intoelectrics said:
That's a tall pedestal you have put yourself on John, you clearly have issues.
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No, lifetime of dealing with many who think they know better because they picked it up, with little to no education. Many have said to me they have 30 years experience, so must know it all. In reality they have had 6 months repeated 60 times.
 
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