More Space in Panels
Building control panels is easier using modern wiring duct. Using duct
became popular for a professional appearance and efficient wire
connection changes. More recent wiring duct options save panel space.
Running out of space can destroy hours of labor. Yes, you should lay out all the components before ordering the box, but sometimes you have last minute additions. Maybe you have limits on wall space to mount the enclosure. Larger enclosures cost more, even if you have the space.