Running 50x50 metal trunking

[PS Electrics]

Thank you, just had a thought, am doing to need water in there too for a Belfast sink as it's as I said going to be a bar so would a 15mm pipe fit in this too?

If you are going to put water in there at some point, personally I would get a duct put in for it whilst burying the SWA. The water pipe outside would be susceptible to freezing. Burying below 900mm protects against this.

 

[leonc1963]

If you are going to put water in there at some point, personally I would get a duct put in for it whilst burying the SWA. The water pipe outside would be susceptible to freezing. Burying below 900mm protects against this.

I would if it was grass but unfortunately it's a double layer of concrete so will have to insulate the pipe.

 

[Simon47]

If you're running water as well, by the time that's insulated it'll be 2 or 3 inch dia - that's maybe not going to look right perched on top (or slung underneath) a unistrut.
If you want to enclose both the cable and the pipe, you'll need to go up a size with your trunking. If you rivet the lid in place (stainless pop rivets), it'll be rigid enough across that small a gap. Next sizes up are 75x75 and 100x50.

 

[Simon47]

On the other hand, even 15mm copper pipe would be self supporting (as long as no-one does pull ups with it). And a length of galv conduit could carry the cable (T&E would be fine) alongside.

 

[leonc1963]

Thank you guys, plenty of options I'll pass this onto the electrician on Monday and let him decide best course of action.