Electric Duct Junctions and Access Points
Discussion
As part of my new patio I am putting a number of ducts in to carry electric cables either now or in the future. So I have 2 ducts going to my shed, one going to the greenhouse and one to the potential pergola/outside kitchen.
The issue is the other end of the ducts. Sensible option is to run all the cables back to the distribution board in the garage. However I dont really want 4 ducts appearing in the paving along beside the garage. I'd therefore like to terminate the ducts underground in a chamber and run a single duct from the chamber to the garage. I wouldnt have an electrical junction box underground unless waterproof versions are available. I hoped to run 4 cables in one duct to the junction box and then each cable in a seperate duct from there.
The problem is finding a chamber. The chamber will be under the path alongside the house. I cant really find any electrical duct chambers bit have found this https://www.screwfix.com/p/floplast-push-fit-3-inl... which can then have one of these https://www.screwfix.com/p/floplast-square-to-roun... on top.
Or is there an alternative solution?
The issue is the other end of the ducts. Sensible option is to run all the cables back to the distribution board in the garage. However I dont really want 4 ducts appearing in the paving along beside the garage. I'd therefore like to terminate the ducts underground in a chamber and run a single duct from the chamber to the garage. I wouldnt have an electrical junction box underground unless waterproof versions are available. I hoped to run 4 cables in one duct to the junction box and then each cable in a seperate duct from there.
The problem is finding a chamber. The chamber will be under the path alongside the house. I cant really find any electrical duct chambers bit have found this https://www.screwfix.com/p/floplast-push-fit-3-inl... which can then have one of these https://www.screwfix.com/p/floplast-square-to-roun... on top.
Or is there an alternative solution?
There are lots of duct access chambers out there to buy but they tend to be full sized 600mm ones.
That drain one would work fine as a junction for splitting the routing from one duct to many, though you might need to be creative in jointing between chamber & duct depending on sizes & fitment. It's certainly solid and waterproof enough in itself.
Any jointing/junction you put in there would have to be waterproof anyway.
That drain one would work fine as a junction for splitting the routing from one duct to many, though you might need to be creative in jointing between chamber & duct depending on sizes & fitment. It's certainly solid and waterproof enough in itself.
Any jointing/junction you put in there would have to be waterproof anyway.
We have a load of these around the place: https://www.drainagepipe.co.uk/duct-access-chamber...
They also do them in 300mm, but watch out for bend radius issues if you’re changing direction and/or using fat cables. The chamber sections are stackable if you need more depth, and easy to cut the access holes using a hole saw.
Choose the cover based on load requirement (you don’t need to stick with the basic composite ones if you need higher load ratings). Ideally surround the chamber with concrete once installed.
They also do them in 300mm, but watch out for bend radius issues if you’re changing direction and/or using fat cables. The chamber sections are stackable if you need more depth, and easy to cut the access holes using a hole saw.
Choose the cover based on load requirement (you don’t need to stick with the basic composite ones if you need higher load ratings). Ideally surround the chamber with concrete once installed.
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