How important is it that a sign such as covered in Article 600 of the NEC, be Listed? Do the inspectors across this BB insist on a Listed marking on signs? Additionally, do they ask that the signs get a "sidewalk inspection" before they are installed on the wall?
George: Here in my areas of NJ the 'sign' must have a UL label. As to the sidewalk inspection; 99.9% not a chance in hexx. They are up when we get the call. 'Signs' (boxes/channel letters) are usually not a 'problem', it's the NEON work (outline lighting & 'skeleton neon') that's the problem children.
BTW, do you have the mysterious midnight sign & neon guys in your area, or are they a NY metro area anomoly?? Leave a strip mall at 3:00PM, happen back at 7:30AM, and 'poof' there's a new neon install!!
George, I think that one requirement speaks volumes. Just by requiring a sign to be listed, the NEC has added a whole series of standards to the requirements for a sign that might otherwise need to be inserted into the language of the code such as UL 48 or UL 1433. Signs installed in our jurisdiction are required to bear a listing mark. As for sidewalk inspections, we usually don't get called for the inspection until we send the cotractor a notice of violation reminding him he has to get his sign inspected.