I am getting ready to drop s.o. cords down from the production ceiling, we are going to use a cgb with a kellum grip and the cord is going to have twist lock cord cap on the end that hooks to the piece of equipment, on that note we will be dropping 480 volt three phase and we will be dropping 208 volt three phase and some 120 volt single phase this is a wash down area. My question is that I have someone telling me that they need to be on ground fault protection is that true for the cord drops. I do have a ground fault on the 4000-amp service that is coming into the building and we do have the ka ratings set to every sub panel,