One of my customers is a large auto dealer with a paint shop on the premises. His insurance agent visited and saw a whip on the motor for the paint mixer (equipment that holds about 50 different cans of paint and auto mixes them for desired color). The existing whip looks like 3/8" black seal tite. He said that it does not meet the requirements for a Class 1 Div 1 location. The existing whip enters the back of a 20 amp twist lock plug which plugs into an explosion proof receptacle. What would be the correct way of connecting this piece of equipment?