SWA cable water proof junction box - what type?

[mikehardy]

Hi I need to terminate 2.5mm 3 core SWA cable on the outside wall then connect through wall to a 13 amp socket connected to the house ring main. What sort of junction box to use on the outside wall? The other end of the SWA is in a garden shed, what sort of junction box should be used here? IP66 or 67? Need to be metal for ease of termination of SWA?.

Thanks for any info.

Mike.

 

[mogga]

PVC 3x3 use an earthnut on swa get the raychem gel to fill box Silicone behind box over hold in wall jobs a goodun

 

[Silly Sausage]

If he's planning on running the SWA cores through the wall to the socket how about some 20mm conduit for protection?

 

[mogga]

I never noticed that Archy

 

[malcolmsanford]

Wiska box should do you and you can get earth clamp from them

 

[mikehardy]

Thanks all, which is the best way to get power through the wall - use SWA tails or 2.5 twin and earth via a TB in the junction box?

Mike.

 

[Silly Sausage]

I'd pass the tails through the wall, saves an unnecessary joint then.

if you're going straight into the back of the socket.

 

[mikehardy]

Do I need to protect the tails as they go through the wall?

 

[Silly Sausage]

Personally I'd connect the two boxes together with 20mm PVC conduit and leave as much of the cable bedding on into the socket box.

 

[malcolmsanford]

Yes Mike as per reg 521.10.1 as those tails would be non sheathed then.

As Archy says really can't beat what he said

 

[Engineer54]

Or, ....You could mount an IP 66/7 socket outlet in place of the Wiska type JB. You will then have added provision for any electrical power garden tools thrown in!! ...lol!! Which is what i did on one of my external supplies in Cyprus. In Cyprus, a double costs around 10 / 11 Euros plus VAT!!

 

[Silly Sausage]

Assuming his RFC has RCD protection!

 

[Engineer54]

Assuming his RFC has RCD protection!

I think that goes without saying, of course IF ....''RCD'' protected

 

[mikehardy]

Good point, but not sure about fitting SWA to a plug. The conduit method - can you get 'plastic' conduit smaller than 20mm dia - there is an existing hole 12mm dia through the wall so it would be convenient to use. To drill out would mean removing the wall socket and box.

 

[Silly Sausage]

I think that goes without saying, of course IF ....''RCD'' protected

Just covering all bases