There is a reason behind USA not using din bars like those in the picture? ( Panel wired by me following my boss expectation for speed and quality,did all in 90 minutes) :
Amazon.com: Panduit CDPP8RG DIN Rail Mount Patch Panel : Electronics
SUA500PDR-S - APC DIN Rail - Panel Mount UPS with Standard Battery 500VA 120V | Schneider Electric USA
Amazon.com: IRP1043D Rackmount 4U Low Profile Din Rail Panel 3.78 inch Depth for Industrial Standard 19 inch 2 Post or 4 Post Rack Cabinet. : Musical Instruments