SWA into underground ducting - how to weatherproof/deal with the connection?

[Haighy]

Hi,
I've an SWA power cable being routed through the brick wall of my house, along a few meters, and then into some HDPE 50mm conduit underground which comes up through a concrete slab inside my workshop. I assume others have something similar, so, what have you done about weatherproofing the external conduit entry with the SWA? Did you put it in a meter/junction box, or something else?

Thanks,
Andrew

 

[siggy_7]

I would fit a junction box, which I think is the standard practice for this. Normal twin+earth comes from the house through your wall into the back of the junction box; the SWA enters the junction box through a sealed gland. Junction boxes are like this:
https://www.screwfix.com/p/schneide...-box-with-knockouts-grey-65-x-65-x-45mm/63295
Whilst the gland kits look like this:
https://www.screwfix.com/p/tower-rubber-exterior-gland-kit-20s-2-pack/25996
The gland kits come in different sizes depending on the cable you are fitting:
https://www.enfieldelectrical.co.uk/pages/swa-cable-gland-chart

 

[Haighy]

I thought it was something like that but wasnt sure exactly which bits to use. Will organise that with the electrician today.

Thanks,
Andrew

 

[flying haggis]

is the conduit from house to shed higher at the house end so could provide a path for water to get into the shed? if possible i would keep the swa intact for as long a run as possible ie avoid joins. does the swa connect directly to your consumer unit in the house, if so there is no need to use twin and earth and a junction box. i would simply fill the top of the conduit where the swa enters with a good quality silicone sealant to stop water/insect ingress. if you havent run the swa yet your electrician will probably have a "boot" from a glanding kit that could fit round the cable and over the end of the conduit