The conclusion of use the dual wall polyethylene pipes of DKC for the power cable laying
Double-wall tubes background materials. 3rd edition.
Typical solutions Storage solutions from DKC
The typical album A11-2011 "run the cables in the block of sewage with the use of double wall corrugated pipe. Laying of cables with voltage up to 35kV in the trenches with the use of double wall corrugated pipe"