The only cooler that I have done has been a beer cooler. It was located inside the facility. I used non-metallic LT. I entered the cooler through the top near the evaporator. I did not install a disconnect in the cooler. The cooling contractor did not want one as the mechanical room with the main panel was just adjacent to the cooler. All they requested was that the light circuit was seperate than the evaporator so they could still see with evaporator disconnected. The condensor, however, was on the rooftop. I did install a disco next to it of course.
