Metal parts of signs and outline lighting systems must be bonded to the transformer or power-supply EGC [Sec. 600.7(B)(1)]. But the metal parts of a section sign or outline lighting system supplied by ...

Locate a sign (or outline lighting system) at least 14 feet above areas accessible to vehicles, unless you mechanically protect it from physical damage [600.9(A)] (Fig. 2 on page 62).Section 225.18(4) ...