SWA cable water proof junction box - what type?

[Knobhead]

If you don’t strip the inner serving just pass it through the wall with an additional CPC.

 

[ackbarthestar]

I agree with Malcolm, Wiska box with earthing nut (designed specifically for Wiska). Then terminate in box, no need to fill it with gel since the box is already IP67. Why conduit through the wall? who knows. I would stick some vaseline around the cable for the rear entry or bring it up through the bottom of the Wiska box via a stuffing gland.
T&E or HO7N flex to the SFCU on the other side. RFC is already covered by 30mA RCD.

 

[mechelec]

How about 20mm Galvanised 1 Way and Back Outlet Box with PVC counduit through the wall. SWA inner sheath and cores through the wall and therefore no connections in box. see below

http://www.******************/Products/CO20BX1BOG.html

or use a 20mm galv terminal box and use 20mm holesaw for the back entry

 

[Knobhead]

I can’t get my head around this fascination of terminating the cores in the box. Why introduce problems just feed the un stripped inner serving through the wall.

And please don’t tell me T+E is better protected!

 

[ackbarthestar]

I can’t get my head around this fascination of terminating the cores in the box. Why introduce problems just feed the un stripped inner serving through the wall.

And please don’t tell me T+E is better protected!

I don't think its an unnatural fascination. Perfectly acceptable to have available terminations to add an extra socket if needed at a later date.
What about that special water feature you always wanted but didn't have that spare IP socket to hand. ?

 

[mikehardy]

I am confused with all this jargon!! CPC, SFCU, RFS, what does it mean? Problem is simple, twin socket on the inside, from this a spur to the shed outside via SWA cable. The house wiring is protected with a Consumer unit with a 30mA RCD, do I need a second 30mA to protect the spur? In the shed the circuit is a light plus one double socket.

Mike.

 

[pushrod]

No you do not put two 30mA rcds in series. I suspect the problems might be more than you realize

 

[mikehardy]

Bonding the steel sheath of SWA in a Wiska junction box to the earth circuit terminal - can 2.5mm be used instead of 4mm.

 

[pushrod]

Yes - i think you said earlier your cores were only 2.5 mm

 

[mikehardy]

Thanks pushrod, one other query, I plan to come through the wall with 2.5 TE then up to the wiska JB using a gland this will mean about 50mm of exposed 2.5 TE on the outside of the wall before it passes through the hole in the brickwork - OK or not?

 

[Engineer54]

Thanks pushrod, one other query, I plan to come through the wall with 2.5 TE then up to the wiska JB using a gland this will mean about 50mm of exposed 2.5 TE on the outside of the wall before it passes through the hole in the brickwork - OK or not?

Why would you not put the wiska box over your hole in the wall and come in through the back of the box?? I don't understand this at all!!

 

[Risteard]

Bonding the steel sheath of SWA in a Wiska junction box to the earth circuit terminal - can 2.5mm be used instead of 4mm.

The armour must be earthed, not bonded, as it is an exposed conductive part.

 

[mikehardy]

Why would you not put the wiska box over your hole in the wall and come in through the back of the box?? I don't understand this at all!!

Good point - not thought of that!!

 

[Silly Sausage]

Mike, if you're within a short bike ride in south manchester I'd gladly come and help you out.

 

[Knobhead]

Nice offer Archy and one Mike should take up.