E DIN EN 50626-2 VDE 0605-626-2:2017-08

Conduit systems buried underground for the protection and management of insulated electrical cables or communication cables

Part 2: Particular requirements for conduits for special applications;

E DIN EN 50626-1 VDE 0605-626-1:2017-07

Conduit systems buried underground for the protection and management of insulated electrical cables or communication cables

Part 1: General requirements;