I just purchased a set of fluorescent fixtures that are fitted with a plug to connect to a standard 3-prong receptacle. My intention is to replace the plug with Romex cable, and wire the fixture directly into a switched-controlled circuit.
When I disassembled the fixture I noticed the plug's ground wire was attached to the fixture chassis via a screw, while the live and neutral attached to the ballast. However, the ballast has a terminal for live, neutral, and ground wires (see photo), which is confusing. Why not just attach the all plug wires directly to the ballast?
I suspect this happened because the plug ground wire is stranded and that it may not make good contact with the spring-loaded terminals on the ballast. In any case, is my plan to connect the three Romex wires directly to the ballast sound?