Extending SWA cable indoor

[jacoscar]

I’m going to have an internal wall removed and on this wall there is a fused connection to a SWA cable going to the garage

The cable is not long enough to allow me to take it to a different wal

Is there a way to extend it and leave the junction buried in screed?

A quick search comes up with this
https://www.googleadservices.com/pa...wiV2Jj9juT0AhX1QUEAHcOqAQYQzzl6BAgBEB4&adurl=

 

[Robin0577]

The device in your link has screw terminals. That will not be acceptable. You need something which is maintenance free such as a crimped joint inside an epoxy resin filled enclosure.
https://www.tlc-direct.co.uk/Products/SWJK1.html

Even that will compromise the mechanical protection offered by the cable armour though, so I'm not entirely sure it would be compliant.

 

[jacoscar]

The device in your link has screw terminals. That will not be acceptable. You need something which is maintenance free such as a crimped joint inside an epoxy resin filled enclosure.
https://www.tlc-direct.co.uk/Products/SWJK1.html

Even that will compromise the mechanical protection offered by the cable armour though, so I'm not entirely sure it would be compliant.

Does it have to offer mechanical protection when indoor? I thought even normal cable was fine to run in a concrete floor

 

[ericmark]

There are two way commonly used to joint SWA cables, one as already stated is epoxy resin filled the other is epoxy lined shrink sleeve, the latter is neater but getting it all into the shrink sleeve is not always easy.

 

[jacoscar]

My SWA cable uses the armour as cpc, how do I join that?
Edit: I just saw they come with an earth continuity strip


What about this box?
https://www.tlc-direct.co.uk/Produc...--ECLGxX5NMzidcgX6GeyhLULI-8GoKkaAhamEALw_wcB

 

[flameport]

What about this box?

Despite it claiming to be waterproof, I wouldn't use that underground.
Items underground must be 100% filled, as any air space will inevitably get moisture in it and cause the joints to fail.

A resin joint as suggested previously is the only viable long term solution, and this one: https://www.screwfix.com/p/prysmian-puj2cc-2-5mm-resin-joint-kit-4-core-max/61439 is a far better choice as it's a known quality brand and includes all the parts required.

However it's not really a DIY solution as it requires a decent crimp tool and you only get one chance to get everything right.

 

[jacoscar]

Despite it claiming to be waterproof, I wouldn't use that underground.
Items underground must be 100% filled, as any air space will inevitably get moisture in it and cause the joints to fail.

A resin joint as suggested previously is the only viable long term solution, and this one: https://www.screwfix.com/p/prysmian-puj2cc-2-5mm-resin-joint-kit-4-core-max/61439 is a far better choice as it's a known quality brand and includes all the parts required.

However it's not really a DIY solution as it requires a decent crimp tool and you only get one chance to get everything right.

That’s exactly the product I ended up buying; I have a crimp tool so it shouldn’t be a problem

 

[bernardgreen]

I have a crimp tool so it shouldn’t be a problem

but is it the right tool for the crimps that you will be crimping ? There are dozens of different types of crimping tools for dozens of different types and sizes of crimps.

 

[jacoscar]

but is it the right tool for the crimps that you will be crimping ? There are dozens of different types of crimping tools for dozens of different types and sizes of crimps.

I think it’s the one on the left that I need, am I right?

 

[jacoscar]

 

[bernardgreen]

I think it’s the one on the left that I need, am I right?

Without knowing the size and type of crimp I cannot answer your question.

 

[jacoscar]

Without knowing the size and type of crimp I cannot answer your question.

The connector is the insulated ‘splicing’ type where you insert one wire at each end

Blue connector in the blue marked jaw?

I have always struggled to find proper information on what kind of jaw goes with what crimp so it’s normally a trial and error for me

 

[bernardgreen]

I have always struggled to find proper information on what kind of jaw goes with what crimp so it’s normally a trial and error for me

Same here, contacting the manufacturers doesn't always result in a clear cut answer.

But I think you are right about the crimp and tool combination.