What are these symbol from single-line diagrams of switchboards?
It seems they are not always related to optical fiber, as shown on this snapshot:
Asked
Active
Viewed 91 times
1
-
https://electronics.stackexchange.com/a/586057/152903 – Solar Mike Sep 09 '21 at 12:05
-
https://electronics.stackexchange.com/questions/586019/what-are-these-electric-components/586057#comment1533725_586019 – Corentin Pane Sep 09 '21 at 13:02