Underground pipe - to run services in

Grumpy_chap

Use 4" flexiduct

Kiran

Ideally you would want to use ducting rather than drainage pipe so as not to cause confusion in the future. Work on the principle of  N+1, if you think you need 1 duct then put in 2. If you think you may want to draw 2 services through a duct, put in 3 draw ropes. Everything is easier to do now than later when there is a problem. Record the position of the ducts from physical boundaries that wont move such as the wall of the house or neighbouring boundary. It'll be an absolute nightmare trying to find a duct that was 1.8m off the garden gnome!

Eldi_Dos

Murmansk said:

I think your nice big pipe will be better than that 20mm pipe shown in a post above - I used some of the 20mm stuff and you'd be surprised how hard it was to pull just a CAT5 cable through it once it had been installed and had a few bends in it

Agree it is not a good product to use but if ever tempted it is better to lay it out straight on ground and pre cable it then put in trench and backfill.

Eldi_Dos

EssexExile said:

Whatever pipe you use, leave a draw rope in it. When you come to put the first cable in you can pull it, and another draw rope, through. Every time you pull a cable through pull another draw rope for next time. Much easier than pushing rods through, especially if the duct is corrugated.

While your suggestion about attaching draw rope to front of cable and pulling in together in short runs, like most domestic situations are is ok,it is a method not allowed in commercial cabling.

What happens when cable and drawrope are pulled in together is that the drawrope spirals round the cable it is being pulled in with.Then when next cable is pulled in the drawrope under tension cuts into exsisting cable causing rope burn and sheath and other faults.

EssexExile

Eldi_Dos said:

EssexExile said:

Whatever pipe you use, leave a draw rope in it. When you come to put the first cable in you can pull it, and another draw rope, through. Every time you pull a cable through pull another draw rope for next time. Much easier than pushing rods through, especially if the duct is corrugated.

While your suggestion about attaching draw rope to front of cable and pulling in together in short runs, like most domestic situations are is ok,it is a method not allowed in commercial cabling.

What happens when cable and drawrope are pulled in together is that the drawrope spirals round the cable it is being pulled in with.Then when next cable is pulled in the drawrope under tension cuts into exsisting cable causing rope burn and sheath and other faults.

That's what liquid paraffin is for!