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Underground S.W.A. Joint.
Zoomup
2277 Posts
Question
Q.1. Why not just overlap the steel wire armour strands and connect them with a big connector like the live cores?

Q.2. Why not provide an air vent hole to let the air out that would aid the filling process. After use the air vent hole could be capped off with a push fit cap.

https://www.bing.com/videos/search?q=youtube+underground+cable+jointing&docid=608005191810220304&mid=B35A506FF48B038CEFEDB35A506FF48B038CEFED&view=detail&FORM=VIRE

Z.
7 Replies
mapj1
3144 Posts
Fixed the link for you. (to do it yourself in the top bar is a triangle in circle between the chain 'link' button and the paperclip 'attach file' button Paste in the video URL  there directly,having clickd and 'copy video link' from the bing page. )
The constant force springs keep the armour circumferentially together and unstressed. But you could cut the armour long and comb it into a connector.
One day all wholesalers will hopefully sell the springs on their own.
Mike
Zoomup
2277 Posts
Thanks Mike.

Z.
perspicacious
500 Posts
I'd like to see that made off in a trench, not a table top where you can rotate the demonstration ends to suit, yet alone trying to maintain a reasonable peripheral thickness of resin.............. Oh. in the rain, mud, cold, dark as well...........

Regards

BOD
Zoomup
2277 Posts
perspicacious:
I'd like to see that made off in a trench, not a table top where you can rotate the demonstration ends to suit, yet alone trying to maintain a reasonable peripheral thickness of resin.............. Oh. in the rain, mud, cold, dark as well...........

Regards

BOD

That is what the apprentice holding the torch and brolly is for😊

Z.

In my experience, the job is much more difficult if one tries to do much with the armour, it is very stiff (particularly in larger cables) and there is a lot of cross-section to join which is difficult. If the joining is just the cores it is not bad, and can be quite compact. The link braid and springs seem to work, and more importantly stay working when encapsulated. I don't think I have ever had trouble getting the resin in, if you do just work a bit more slowly, the air bubbles do take time to come up and it is important that they all have.
I've never heard of an apprentice brolly holder BOD, are you a Master brolly holder?
perspicacious
500 Posts
I've never heard of an apprentice brolly holder BOD, are you a Master brolly holder?

I think you're crediting me with this post: 

That is what the apprentice holding the torch and brolly is for

actually written by Zoom.........

Regards

BOD

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