Tinning Flex for Hob connection

[gembrain]

So the new hob comes with a 5 core insulated flex. 2 cores together for live, 2 together for neutral, and one for earth. Only thing is they have taken off a silly amount of the outer insulation.

Sparky says soldered better than not and doesn't mention ferrules. So I cut off the nicely terminated ends, cut to the right length, strip and twist the two pairs and then out with the soldering iron and a bit of solder and they're fixed. 

Hunting for a decent connector block I come across a thread mentioning 526.8.2 .....

"Soldering (tinning) of the whole conductor end of multiwire, fine wire, and very fine wire conductors is not permitted if screw terminals are used"

I assume this is meaning the fixed installation rather than appliances and Sparky will clearly be happy to fit it with the tinned ends but should I get myself a crimper and do it "properly".

And why are tinned ends a problem with a screw terminal? 

Thanks

 

[Blue Duck]

Whats wrong with 3 core flex?

 

[Andy™]

And why are tinned ends a problem with a screw terminal? 

cold flow

 

[apprentice87]

Hi there.

It is because lead is a material that "creeps" at room temperature. As you may have guessed, as the temperature rises, so does the rate of creep..

Have you ever looked at old lead pipes?? You will see that they have sagged down in between supports. They would not have been like that as installed. The material has "crept" with time under its own weight.

Anyway, in theory at least, the terminations are liable to slacken off with time..

Will the sparky care?? To be honest EVERY time i terminate stranded cables i use ferrules, BUT according to the factors where i get stuff, nobody else does.... In fact, to get uninsulated "bootlace" ferrules, i had to send away in the post, as the electrical factors do not stock them.....

Sparky will most likely not even be aware of the reg regarding this, but well done you!!!! I would get the ferrules though and do it properly. You will need the proper crimpers too

Ferrules https://www.rapidonline.com/truconnect-uninsulated-bootlace-ferrules-72043

Proper crimpers https://www.rapidonline.com/partex-bootlace-ferrule-crimping-tool-63944

P.S. Try and get a "selection box" [you know what i mean] of ferrules!! Another advantage while i think of it is it makes it easier to get cable strands in to the hole and there is the certainty of not having "stray" or broken off strands floating about... [Always a bad idea!!]

Hope this helps...

john..

 

[gembrain]

Whats wrong with 3 core flex?

Hob supplied with 5 cores coming out of it. I was surprised

 

[gembrain]

cold flow

Thanks - So in due course I would end up with a loose connection?

 

[Andy™]

Hob supplied with 5 cores coming out of it. I was surprised

dont be. there are a lot of them like that

Thanks - So in due course I would end up with a loose connection?

yep. apprentice87 said the same thing but in a bit more detail

 

[gembrain]

Thanks John and Andy - much appreciated

All makes sense and I will get the crimper and ferrules and do it proper!

 

[Apache]

Something like this:

http://www.ebay.co.uk/itm/CIMCO-press-pliers-crimp-tool-No-101906-set-3500-Uniso-ferrules-RAACO-Box-/391014989328?hash=item5b0a4f3e10:g:kZ8AAOSwiYFXJRnX

I'm tempted and I definitely don't need one!

 

[Sidewinder]

Something like this:

http://www.ebay.co.uk/itm/CIMCO-press-pliers-crimp-tool-No-101906-set-3500-Uniso-ferrules-RAACO-Box-/391014989328?hash=item5b0a4f3e10:g:kZ8AAOSwiYFXJRnX

I'm tempted and I definitely don't need one!

Crimp tool is carp.

 

[kerching]

I was doing exactly that today...crimping bootlaces ferules onto a 6mm 3 core cooker flex.

proper crimps

proper crimper.........I carry the ferules and crimpers on  the Van up to 50mm

why is a  bootlaces ferule on your Bootlaces not called a ferule?

just wondering 

 

[Apache]

what would you recommend?

 

[Andy™]

why is a  bootlaces ferule on your Bootlaces not called a ferule?

just wondering 

because they are called aglets

 

[Sidewinder]

what would you recommend?

I would recommend a Weidmuller crimper, but, the are not cheap.

Say for example a PZ6 roto 0.14-6mm sq IIRC.

Unless it's a ratchet type then it's really not worth bothering with.

 

[OnOff]

This is the one I have (made in Sweden by Pressmaster):

http://uk.rs-online.com/web/p/crimp-tools/3992031/?searchTerm=399-2031&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E266C753D656E266D6D3D6D61746368616C6C26706D3D5E283F69292852537C5253207C52532D293F5C647B337D285C73293F5B5C732D2F255C2E2C5D285C73293F5C647B332C347D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D4245522677633D4E4F4E45267573743D3339392D32303331267374613D3339393230333126

 

[kerching]

because they are called aglets

Not a lot of people know that.....I often wondered why they had a different name.

my mate is a Cordwainer and he does not know either

 

[Blue Duck]

Derived from the French & Latin words for needle.

I looked it up on Wikipedia thinking that it was more interesting than that....

 

[kerching]

Derived from the French & Latin words for needle.

I looked it up on Wikipedia thinking that it was more interesting than that....

Mmm that was a lot less exciting than I hoped for