Wiska Box Seals

[Deryck Tintagel]

I am looking at putting some SELV lighting in the garden - 12V LED driver in the garage so no worries about that side - but some lights will be supplied by one cable to then split near their destination

My question relates to the self-sealing WK 116 type boxes. Is the seal satisfactory or would a different box with a gland be recommended?

 

[sparkwright]

The trouble with that particular box is that there is no strain relief on the cables, something that a gland would offer.

Wiska make outdoor JBs with threaded entries, so you have a choice of just poking the cable through, or screwing a gland in.

Avoid top entry, as water is more likely to enter.

 

[JohnW2]

Avoid top entry, as water is more likely to enter.

Indeed.

In the case of SWA (or similar), I personally favour side-entry, since if one uses the bottom, water can possibly run into the cable and corrode the armour.

Kind Regards, John

 

[Harry Bloomfield]

Indeed.

In the case of SWA (or similar), I personally favour side-entry, since if one uses the bottom, water can possibly run into the cable and corrode the armour.

Kind Regards, John

Also drill a small drain hole at the lowest point to enable any moisture which does get in, as it will, to escape.

 

[Deryck Tintagel]

The trouble with that particular box is that there is no strain relief on the cables, something that a gland would offer.

Wiska make outdoor JBs with threaded entries, so you have a choice of just poking the cable through, or screwing a gland in.

Avoid top entry, as water is more likely to enter.

Ah! Not thought about strain relief especially as the cables could be tugged whilst in the garden - some cables will be laid on the surface to the light. TLC seem to have some sort of strain relief gizmo for the boxes but not sure how well it would work. I have also thought that some flexible conduit might also be worthwhile to give a little mechanical protection so glanding would be the natural choice

 

[Deryck Tintagel]

Also drill a small drain hole at the lowest point to enable any moisture which does get in, as it will, to escape.

Not quite sure how all will be mounted - one I think will be fixed to a post - most may be just lay on the surface. I will need to figure this one out!

 

[333rocky333]

When i done my garden i concreted in stumps of wooden fence post about 300mm high with hand made hardwood caps on top, the boxes were mounted on them.
Seems to be the trend now to fill boxes with electrical jelly and bury them, which i suppose is fine if done good

 

[JohnW2]

Ah! Not thought about strain relief especially as the cables could be tugged whilst in the garden - some cables will be laid on the surface to the light.

It would be adequate to clip the cables (firmly) to the wall/post/whatever close to where they enter the box (more than one clip per cable!).

Kind Regards, John

 

[Deryck Tintagel]

When i done my garden i concreted in stumps of wooden fence post about 300mm high with hand made hardwood caps on top, the boxes were mounted on them.
Seems to be the trend now to fill boxes with electrical jelly and bury them, which i suppose is fine if done good

That might work in my garden. I will have some 3" x 3" posts replaced later this year and I could re-use those and would look better than just lying around!