FTN typical drawing (D&D)
DR FTN (D&D) 023
Typical Copper Section on a Fibre Line in a DC Electrified Area
Issue 2
What the drawing shows
As 022 but for DC electrified areas, with the different earthing and bonding treatment that implies.
Typical drawings are a starting point: the project design, the site survey and the current standards decide what is actually built.