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Dodgy trade pictures for your amusement! - 1 Million Views!

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Discuss Dodgy trade pictures for your amusement! - 1 Million Views! in the UK Electrical Forum area at ElectriciansForums.net

Darkwood

Darkwood

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Right ... Just been nudged to set this up by Paul.M and sounds a good idea following recent threads I've done in the Arms..

Rules....No Offensive material... edit if required before posting as this is the public arena.
Anything to do with the trade or in and around it ...H&S pic's welcome.

[ElectriciansForums.net] Dodgy trade pictures for your amusement! - 1 Million Views!

I've posted this a few times and this is at a mates house following a kitchen refirb several yrs ago. :eek:mg_smile:

[ElectriciansForums.net] Dodgy trade pictures for your amusement! - 1 Million Views!
 
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Mike Johnson said:
Just a general enquiry, who else thinks that bending cables at right angles is not a good idea?
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If you’re referring to the cables that are supplying the RCDs etc that are at 90 degrees. They’re like that from the manufacturer.

As long as the bend radius in relation to the CSA is ok then I don’t have a problem with it.

It’s when you see them almost folded in two. But then it is deemed good practice to do so with a single 1-2.5mm CSA conductor to ensure a good electrical contact.

Never understand why that’s ok but but you couldn’t bend the cable back like that elsewhere.
 
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So bending a multi cored cable or a solid core which is worse, bending a solid core at right angles introduces massive tension and compression to the core which would be spread over a multi core cable.
 
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Mike Johnson said:
So bending a multi cored cable or a solid core which is worse, bending a solid core at right angles introduces massive tension and compression to the core which would be spread over a multi core cable.
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Considering they are made to a specification which is approved for sale in UK, ergo conforms to safety standards, I’d suggest they’re compliant.

Unless a defect is found, which given the amount of Chint boards around would likely have happened by now if there was.

It’s no different to these busbars in Schneider boards that are formed into a U-Shape to go around the neutral conductor in the main switch.

[ElectriciansForums.net] Dodgy trade pictures for your amusement! - 1 Million Views!


I also removed this from a board I changed today.

[ElectriciansForums.net] Dodgy trade pictures for your amusement! - 1 Million Views!
 
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I think you have just proved the point of how much stress is put on a core when bent at right angles, I wonder how much cracking has happened internally when bent the once, would be interesting to set up a test rig and measure the resistance between straight and bent at right angles or a radius once or twice.
 
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Mike Johnson said:
I think you have just proved the point of how much stress is put on a core when bent at right angles, I wonder how much cracking has happened internally when bent the once, would be interesting to set up a test rig and measure the resistance between straight and bent at right angles or a radius once or twice.
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I’m sure the boffins already have given the amount of bent and right angled cables and conductors out in the wild.
 
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Like any metal, solid copper links are possibly heated up to form a bend, then it stays that shape.

Some internal links are fine stranded, so easy to bend, but the crimps they put on the ends holds all the strands, and the formed shape, in place.
 
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Mike Johnson said:
So bending a multi cored cable or a solid core which is worse, bending a solid core at right angles introduces massive tension and compression to the core which would be spread over a multi core cable.
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They come manufactured like this Mike, the installer doesn't bend them to shape. I guess the manufacturers have done their tests and are happy.
 
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Just once.

Wasn’t the link that failed, it was a badly designed system where too much power was going through a link somehow, melted the insulation on the neutral link and the incoming live…..

Bang flash, out goes the DNO fuse and a Sunday call out for me.
 
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The milage would be in the amount of electricians that bend cables we spool off drums at right angles in an attempt to make the internal cable runs look like they are factory fitted, the amount of pic's on this Forum alone show a large number.
 
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Mike Johnson said:
The milage would be in the amount of electricians that bend cables we spool off drums at right angles in an attempt to make the internal cable runs look like they are factory fitted, the amount of pic's on this Forum alone show a large number.
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I can't think of a single image on this forum that shows anyone having done so. Such basic installation techniques are a fundamental part of any trainee's education.
 
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Mike Johnson said:
The milage would be in the amount of electricians that bend cables we spool off drums at right angles in an attempt to make the internal cable runs look like they are factory fitted, the amount of pic's on this Forum alone show a large number.
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Out of interest how would you deal with a set of tails that come in rear, side or bottom entry? You’d have to bend those to get them into the switch. So curious as to how you’d do it, given your stance on bending conductors.
 
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Bending a multi-core cable is totally different to bending a single-core conductor. In a multi-core cable the outer conductors are stretched but the inner conductors are compressed.
 
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westward10 said:
Bending a multi-core cable is totally different to bending a single-core conductor. In a multi-core cable the outer conductors are stretched but the inner conductors are compressed.
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Ok, so how would the termination be done for a single 2.5 conductor?

ESF state this as best practice and it’s what I was taught to do and see most other electricians doing the same. It’s a single solid conductor bent at 180deg.

I’ve never understood how this is fine but some find bending a cable at deg unacceptable. 🤷🏼‍♂️

[ElectriciansForums.net] Dodgy trade pictures for your amusement! - 1 Million Views!
 
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