How to flag / protect on a moled cable ?

[JD6400]

I have been told in the past ( All be a builder that wanted the job instead ! ) that it is illegal to mole cables underground as you can not install a marker tape with it !
What thoughts do others have on this one ?
Thanks in advance if you reply .

Dave

 

[Guitarist]

As I don't know anything about moling; is it usual to pull in a duct to protect the cable from sharp stones?

Without additional protection such as a flexi-conduit or ducting, the cable should be surrounded by sand to eliminate stones piercing the sheath.
I am a "belts and braces" man so always install underground cable in a conduit.

 

[JD6400]

This is part of my question really , i have never seen a utility company do this when i have seen them do road crossings in the past ?
We tend to nearly always pull expander's up the mole and then duct it before pulling a service , this approach is very labour intensive but the right one in my opinion !
It would be good to know for definite though what the minimum requirement would be ?

 

[Guitarist]

Regs are that armoured cable is buried to a suitable depth with marking tape or a marked cover above it (reg 522.8.10). Good working practice is to lay the cable on 100mm of sifted sand at a depth of 600mm, then a further 150mm of sifted soil or sand is poured over the cable. Then a marked cable tile is placed on the sand followed by the backfill.
If the cable runs through a suitable ducting or conduit then that method of protection should be suitably identified. I think Jase's suggestion of orange conduit would cover this if it was impossible to place marking above the cable itself.

 

[JD6400]

This is how i see it too , but how do the utility company's get away with it ?
I suppose they don not follow the same regs as us though .

 

[Guest111]

seen them put under motorways and apparently they have to run at 90 degrees to the road and they put a concrete marker post at each end, and of course marked on digging prints,as the idea of moling under a mway is to avoid disruption opening it up.