Hobbiest here with just enough electrical knowledge/experience to get my self in trouble.
I'm DIYing a cnc plasma machine. I just picked up a big metal NEMA enclosure for my electronics and it came with a galvonized steel mounting plate. I poked around with a multimeter and noticed that there is no continuity between the box and the mounting plate. A thin rubber washer and layer of paint separate the enclosure from the mounting plate's hardware.
My question: do I need to ground the mounting plate on the enclosures grounding post?