Is that something other than a labelling convention? Is ground actually connecte...

CamperBob2 · 2026-03-25T02:35:06 1774406106

Cathodic protection against corrosion was the goal of using -48V, in the telcos' case.

myself248 · 2026-03-25T03:54:42 1774410882

And the telegraph lines before that.

magicalhippo · 2026-03-26T01:48:20 1774489700

> Is ground actually connected to a earth stake?

Yes, or something similar[1]:

A few of the more efficient grounding electrodes for buildings and structures are:

- Metal Underground Water Pipe

- Metal In-ground Support Structures

- Concrete-Encased Electrode (also known as “footer ground” or “Ufer ground”).

- Ground Ring

As mentioned this is particularly important for telecom and similar systems which have signal wires going literally through the ground.