I was at a police dispatch center today. The builder had mounted, about 9’ up the wall, a 1/4 or 3/8" copper cable on brackets around the entire perimeter of the room and adjoining offices. Above that was drop ceiling.
At first, I didn’t see it in its entirety, and assumed it was a ground for something (maybe a radio antenna.) Still seemed strange to run it indoors. After I noticed the circuit, I asked what it was for and was told that it was to protect the facility from lightning strikes…not only that, but the room that housed the majority of the telephone and radio equipment was outfitted similarly.
I understand that a room or facility that houses sensitive electronic equipment may be protected from electrical interference by a Faraday cage…but a single copper wire?
Is there an explanation for this, or is this copper decoration as pointless as it seems?