Our church recently added some additional parking lights. They'll be running a 20amp/120volt #6 triplex between 3 poles. On the first pole there will be a switch disconnect for the entire series. From the breaker panel to the disconnect, the wiring will be a hot, neutral and ground, in conduit underground. From the disconnect, 2 insulated conductor (hot and neutral) will go up to the lights. This is because lights are designed in a plastic enclosure and a ground is not required for them. My question is the messenger cable need to be grounded? Rule 396.60 requires messenger cables to be grounded, however there exceptions in Rule 250.86 which state no messenger cable is required when:
(1) Do not provide an equipment ground
(2) Are in runs of less than 7.5 m (25 ft) our distance is greater than 25 feet
(3) Are free from probable contact with ground, grounded
metal, metal lath, or other conductive material
(4) Are guarded against contact by persons
For splice pigtails from lights, there will be a split bolt used and then insulated with rubber tape. Is this enough or is something else required? What is the best type of wire to use from pigtails to the main line?
Or perhaps someone has a better suggestion on how to set this up?