SWA in Conduit to MK Masterseal IP56 4 Terminal J / Box

[Jerseyman]

Need some advice please. I've fitted the above unit to my outside wall to take power to a shed about 2.5 m from the house. I have used SWA (3 core 2.5mm) cable for this.
The box is about 45cm above ground level, and I'm using the bottom entry for the SWA. For neatness, I have used some PVC conduit to sheath the SWA before it goes down under a concrete path to the shed. My question is :- Do I have to fit a CW 20mm cable gland to the box, or is it possible to use MK's 20MM Plain Conduit Entry Push Fit Adaptor, and twist and sheath the steel strands and terminate it to earth in the box in addition to the earth feed in the cable. Would this method be ok, as the SWA would be fully enclosed in the conduit which goes down into the concrete?
Inside the shed, it comes up through the concrete base, and is fixed using cleats to the wooden frame, and its terminated into a metalclad RCD socket with a BW 20mm Gland. I have also taken a feed to power a strip light via a 5amp FCU and switch.

J/box :- http://www.mkelectric.co.uk/products/item.asp?itemid=5532&rangeid=1031

MK's 20MM Plain Conduit Entry Push Fit Adaptor 56462 page 7:-
http://www.mkelectric.co.uk/PDF/technical/MASTERSEAL_prod.pdf

 

[securespark]

Use waterproof glands outdoors, and terminate correctly.

 

[Lectrician]

CW20s

It is a true bodge not to use a gland.

 

[Jerseyman]

Use waterproof glands outdoors, and terminate correctly.

CW20s

It is a true bodge not to use a gland.

Guess thats my answer then
Would it be ok to have the outer boot of the CW20 sliped over the pvc conduit, again for neatness, as the gland itself has its main seal to the cable using the rubber compression ring? Or is this also a no no.

 

[electronicsuk]

I don't see why not. Ideally the shroud would be in contact with the outer insulation of the SWA. However, as you mention, you already have a waterproof seal on the gland assembly itself. I can't imagine water is going to work its way up the conduit!

 

[Lectrician]

I dont see how it would be any neater to be honest.

CW20s - Not CW20.

 

[Jerseyman]

Ok, I've now fitted the gland as suggested, and have gone with the PVC conduit option, using the outer boot to cover the upper part of the conduit and gland.

I dont see how it would be any neater to be honest.

CW20s - Not CW20.

The reason I did it that way was because of the type of block used for the house wall (Ronez Split Block) It has a a rather rough undulating texture, and would have been near impossible to get a neat finish just using cable clips.
Had it been a normal brick, or rendered wall, then I would fully agree with you and not bothered with the conduit.

Question time again
Could someone here please enlighten me, and tell me the difference between a CW20 and a CW20s.... What does the "s" stand for?

20 IP66 Gland Kit Ext:-

http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=A331815&ts=54813&id=16877

And this

20S IP66 Gland Kit Ext:-

http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=A331815&ts=54813&id=18738

According to my order history, it is the latter that I have, made by Davico. The label just says "Size CW 20MMS"
But the pictures both look identical to me.

Thanks for all your help, I'm glad I found this site and reading some of the threads has been very interesting