Wire way systems | Wiring trough | Lay-in wireway | Eaton
Electrical Gutter Box setting | Wiring and Installation - YouTube
Wiegmann RSCG040424G RSCG-Series NEMA 3R Screw Cover Wiring Trough with Knockouts, Galvanized Steel, 4" x 4" x 24": Electrical Boxes: Amazon.com: Tools & Home Improvement
What is this called, I'm trying to search for more examples of it? : r/electricians
Hong Electric Enterprises, Inc. - Pull Box, Wire Gutter, CT & Tel Cabinet | Facebook
Type 3R Wiring Trough (C3RWT Series) - Hammond Mfg.