Need an outdoor JB

[safesinbad]

Just been to look at a job, spotlights(IP68) which are installed in slabs in back garden keep tripping RCD. Removed and found they are just connected using connector blocks and tape(didn't have a camera handy sorry). The junction boxes im after are the type which has some sort of silcone inside them already, just peel the sleeve and close and you're at IP68. Any ideas who makes them?

cheers

P.S. Can't find a pic on google either sorry

 

[sparkybird]

http://www.tlc-direct.co.uk/Manufacturers/Wiska/Boxes_Adaptable_Moulded/index.html

and scroll down the page for the 'magic jell' - works a treat in place of chicken fillets too....

 

[ban-all-sheds]

Nice boxes, but they can be a pain to gland into though because they have ribs on the inside which stop the nut tightening down.

Pratley boxes?

'magic jell' - works a treat in place of chicken fillets too....

 

[safesinbad]

SORRY forgot to mention the cables are NOT SWA they are FP200.

 

[ban-all-sheds]

Buried?

That's not right.

 

[safesinbad]

through a duct.

not the best cable choice i know

 

[ban-all-sheds]

through a duct.

Metal, I hope...

 

[safesinbad]

plastic covered with danger tape at 640mm deep, im happy ith that.

 

[ban-all-sheds]

You might be.

The people who wrote 522.8.10 won't be.

 

[safesinbad]

what does 522.8.10 say, i dont have regs handy

 

[ban-all-sheds]

"Except where installed in a conduit or duct which provides equivalent protection against mechanical damage, a cable buried in the ground shall incorporate an earthed armour or metal sheath or both, suitable for use as a protective conductor."

FP200 does not have armour or a metal sheath, and plastic ducting does not provide equivalent protection against mechanical damage.

What you have there doesn't comply. Nor did it under the 16th - 522-06-03 said the same thing, plus insulated concentric.

 

[safesinbad]

I disagree, IMO plastic ducting provides against mechanical damage in that location, anything capable of damaging that at that depth would also be capable of damaging an SWA cable. Question- would you turn the job down?

 

[mfarrow]

Nice boxes, but they can be a pain to gland into though because they have ribs on the inside which stop the nut tightening down.

The 1010's I'd agree with, but the 308s and 607s have integrated M20 and M25 threads respectively which don't need a nut on the inside.

I've just bought some 308s in fact and can't wait to install them.

 

[ban-all-sheds]

I made that observation when I thought the cable was SWA....

But even with threaded holes you should still have a lock nut, surely?

 

[Monkeh]

I made that observation when I thought the cable was SWA....

But even with threaded holes you should still have a lock nut, surely?

Why would you need one? I'd say the earth bar secures them pretty well: