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Topic Title: swa connections ?
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Created On: 26 September 2013 03:52 PM
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 26 September 2013 03:52 PM
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goldenboy1818

Posts: 463
Joined: 22 February 2011

Whats the thoughts on swa joint boxes under the ground. Theres a large wall being built with basically a big cavity it the middle. This will be filled with mud for a flower bed. Client wants brick lights in the wall both sides. Thinking of running armour in this cavity, joining it in a waterproof box and flex + stuffing gland out to each light. Not sure if that will be ok now though as obviously connections will be under ground once the mud goes in. The original plan didn't include this flower bed in the middle so my first thoughts are different to now. Any advice please.
 26 September 2013 04:48 PM
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GB

Posts: 357
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Use something like the Wiska adaptable box and magic gel this gives IP68 so ok for underwater or under mud.
Your flexes sound a little suseptible to damage but that may just be a negative thought on my part.
You could also use a non armoured cable if it does not require mechanical protection, but it has to be suitable to your installation as the flex will need to be.
RCD protection required for any option.
 26 September 2013 04:52 PM
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GB

Posts: 357
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What about a NYY-J Cable for the complete job if you dont need mech protection.
 26 September 2013 05:50 PM
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daveparry1

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Why is rcd protection required then GB? there are no sockets involved.

Dave.
 26 September 2013 05:53 PM
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AJJewsbury

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Under mud sounds equivalent to "buried in the ground" to me - so 522.8.10 ?
- Andy.
 26 September 2013 07:18 PM
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redtoblackblewtopieces

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522.8.10 makes no reference to rcd protection , only that a buried cable should have a concentric earthed sheath I think so if a disconnection time of 0.4 seconds can be achieved and the wiring system conforms to 522.8.10 and internaly 522.6.101 then no rcd protection is required,?
Kevin

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 26 September 2013 08:06 PM
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GB

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I guess that was auto pilot?
But I would seriuosly consider Rcd protection for the installation as outlined, infact that would be my default position and I would need convincing as to why not.
 26 September 2013 08:20 PM
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goldenboy1818

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will all definitely have rcd protection just worried about connections and flex
 26 September 2013 08:38 PM
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OMS

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Originally posted by: goldenboy1818

will all definitely have rcd protection just worried about connections and flex


There speaks a man who hasn't spent much time digging for joint boxes that are full of water

Regards

OMS

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 26 September 2013 08:45 PM
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colinhaggett

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I would use resin joint kits myself. No way water is going to get into those.
 26 September 2013 08:51 PM
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Rulland

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Originally posted by: colinhaggett

I would use resin joint kits myself. No way water is going to get into those.


Do they do resin joints that allow for 'break outs' in a run?, I've only ever seen resin connectors for straight runs.

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 26 September 2013 08:53 PM
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GB

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The old nuisance tripping may be a potential problem which is why I am always surprised to find garden installations with the cheapest fittings c/w galv boxes and a gaskett if your lucky!!
Magic gell / decent fittings / poly carb boxes / cables out of danger & jobs a good un.
 26 September 2013 09:04 PM
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leckie

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I have been down this road big style. Use whatever boxes you want but fill them with magic gel, magic power gel, wiska gel, etc. this will seal all the joints. Protect any swa armoured, armour from corrosion. So seal from the outside as well! CW glands should do this. Do it belt and braces. Because if you don't, water will find its way. As OMS alluded to, I have dug up joints that I thought were perfect, but in fact weren't. 4 ft under plastic grass! Cost me a lot and I learnt my lesson. And I am talking about a quarter of a mile of driveway. Since then, I completely seal everything!
 26 September 2013 09:19 PM
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GB

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oops sounds expensive.
I guess we have all learned lessons the hard way.....unfortunately
 26 September 2013 09:21 PM
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goldenboy1818

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Never heard of this magic power gel etc ??
 26 September 2013 09:25 PM
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AJJewsbury

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Never heard of this magic power gel etc ??

Some info here: http://www.tlc-direct.co.uk/Ma....html#Wiska_Magic_Gel
- Andy.
 26 September 2013 09:27 PM
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prophet

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It seems expensive up front but you'll have piece of mind that the joints will be water tight.

Google magic gel
 26 September 2013 09:27 PM
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colinhaggett

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Originally posted by: Rulland

Originally posted by: colinhaggett



I would use resin joint kits myself. No way water is going to get into those.




Do they do resin joints that allow for 'break outs' in a run?, I've only ever seen resin connectors for straight runs.


You need inner skills when doing garden lighting with resin joints ?? plus the SWA isn't going to be overly big.

 26 September 2013 09:35 PM
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AJJewsbury

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Do they do resin joints that allow for 'break outs' in a run?, I've only ever seen resin connectors for straight runs.

Tee joints are available too - e.g. http://www.tlc-direct.co.uk/Products/SWJKT1.html
- Andy.
 26 September 2013 09:37 PM
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colinhaggett

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Originally posted by: AJJewsbury

Do they do resin joints that allow for 'break outs' in a run?, I've only ever seen resin connectors for straight runs.


Tee joints are available too - e.g. http://www.tlc-direct.co.uk/Products/SWJKT1.html

- Andy.


You'd need a good price to be using them Andy.

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