Single Wire Earth Return power supply for the signalling at down end of the loop

Single Wire Earth Return power supply for the signalling at down end of the loop
View full size photo (1920px by 1280px)

Taken with a Canon EOS 7D
Date: January 08, 2022 13:54 PM
Exposure Time: 1/1000 sec
Aperture Value: f/14
Focal Length: 41 mm