Thin conduit/tube to bury in concrete.

[Agile]

I am building a porch in front of my recessed front door.

The current level needs to be increased about 240mm to match the indoor floor level.

I want to fit three LED lights in the new front of this area with the wires fed back through buried conduit into the house. The conduit will need to bend 90 degrees to follow the route into the house!

Sounds simple at first, until I discover that all the easily available conduit is 20 mm and that the rigid 16 mm oval does not seem easy to bend gently and uniformly into a long radius curve.

So any cheap small bore tube or conduit which can form a long radius bend?

Or any easy way to make the bend in the rigid 16 mm oval?

Tony

 

[ban-all-sheds]

Why can't you bend round 20mm conduit?

 

[Agile]

The cable is only about 4 mm and the entry into the house needs to be through a thick and very hard wall. I am hoping to minimise drilling this with a large diameter drill.

Unless anyone can suggest anything else the best I can think of is 10 mm plastic heating tube but I was hoping to use something very cheap or that I already have in stock.

I need to have a single length in case I need to replace the wire so that I can use as standard draw rod.

 

[flameport]

The problem with smaller diameter conduit/tube is the wire will be far more difficult to pull through.
You can use the 10mm if you want, but before installation suggest you temporarily fix a piece in the curve & length required and then try pulling the wire through it to see how difficult/easy it is.

 

[securespark]

The current level needs to be increased about 240mA

Sorry, Sparky's joke!

 

[securespark]

I would buy this:

http://www.screwfix.com/p/tower-conduit-heavy-gauge-20mm-x-2m-length-black/70541

and this:

http://www.screwfix.com/p/tower-bending-spring-20mm-black-pack-of-1/70712

and if you need to fix the conduit:

http://www.screwfix.com/p/tower-spacer-bar-saddles-20mm-black-pack-of-2/38940


Tie a piece of thin cord to the spring so you can extract it easily.