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You’ve got to observe a few rules on location. The first rule is the equipment must be 14 feet above areas accessible to vehicles unless protected from physical damage [600.9(A)]. An example of such protection is a bollard. It’s significant enough to provide reasonable assurance someone’s not going to drive their car over the equipment.
If you’re installing neon tubing, you have to make sure it’s not readily accessible to pedestrians (that is, they would have to go out of their way to get to it) unless it’s protected from damage [600.9(B)]. If you can’t move the tubing out of harm’s way then install a suitable guard or barrier that will keep hands out.
Signs and lighting generate heat, so provide at least a couple inches of space between this equipment and the structure’s wood siding (or other combustible) [600.9(C)]
If the equipment is going into a wet location (see Article 100 definition, which encompasses more than most people realize), use a listed watertight type if at all possible. If it’s not possible, then the sign or outline lighting must be weatherproof 600.9(D)]. In addition, it must have drain holes meeting these requirements: