S.C. Code Regs. 38-393.11. Lighting devices and reflectors

The following Table 1 sets forth the required color, position, and required lighting devices by type of commercial motor vehicle. Diagrams illustrating the locations of lighting devices and reflectors, by type and size of commercial motor vehicle, are shown immediately following Table 1. All lighting devices on motor vehicles placed in operation after March 7, 1989, must meet the requirements of 49 CFR 571.108 in effect at the time of manufacture of the vehicle. Motor vehicles placed in operation on or before March 7, 1989, must meet either the requirements of this regulation or part 571 in effect at the time of manufacture. *Lighting Required per Type of Commercial Vehicle as Shown Last Column of Table. A. Small trucks less than 80 inches in overall width. B. Trucks 80 inches or more in overall width. C. Truck Tractors. D. Large semitrailers and full trailers 80 inches or more in overall width except converter dollies. E. Converter dolly. F. Small semitrailers and full trailers less than 80 inches in overall width. G. Pole Trailers & Pulpwood Trailers. H. Projecting loads. Lamps and reflectors may be combined as permitted by Paragraphs 38-393.22 and S4.4 of 49 CFR 571.108, Equipment combinations. Exception - Pulpwood, Longwood and Pole Trailers shall not be subject to use of side marker lamps, combination marker lamps or reflectors which require mounting at the top of the rear load standard as provided. Footnote 1 Identification lamps may be mounted on the vertical centerline of the cab where different from the centerline of the vehicle, except where the cab is not more than 42 inches wide at the front roofline, then a single lamp at the center of the cab shall be deemed to comply with the requirements for identification lamps. No part of the identification lamps or their mountings may extend below the top of the vehicle windshield. Footnote 2 Unless the turn signals on the front are so constructed (double faced) and located as to be visible to passing drivers, two turn signals are required on the rear of the truck tractor, one at each side as far apart as practicable. Footnote 3 The identification lamps need not be visible or lighted if obscured by a vehicle in the same combination. Footnote 4 Any semitrailer or full trailer vehicles manufactured on and after March 1, 1979, shall be equipped with rear side marker lamps at a height of not less than 15 inches (381 mm) nor more than 60 inches (1524 mm) above the road surface, as measured from the center of the lamp on the vehicle at curb weight. The rear side marker lamps shall be visible in the vehicle's rearview mirrors when the trailer is tracking straight. Footnote 5 For purposes of these regulations, each converter dolly shall be equipped with one stop lamp, one tail lamp, and two reflectors on the rear at each side when towed singly by another vehicle. Each converter dolly shall be equipped with turn signals at the rear if the converter dolly obscures the turn signals at the rear of the towing vehicle when towed singly by another vehicle. Footnote 6 Pole and pulpwood trailers will have two reflectors, one on each side, placed to indicate extreme width of the trailer. Footnote 7 Pole and pulpwood trailers may have three identification lamps mounted on the vertical centerline of the rear of the cab of the truck tractor drawing the pole trailer, and higher than the load being transported, in lieu of the three identification lamps mounted on the rear vertical centerline of the trailer. Footnote 8 Pole and pulpwood trailers shall have on the rearmost support for the load, one combination marker lamp or two single lamps showing amber to the front and red to the rear and side, mounted on each side to indicate maximum width of the pole trailer; and one red reflector on each side of the rearmost support for the load. Footnote 9 Any motor vehicle transporting a load which extends more than 4 inches beyond the width of the motor vehicle, or having projections beyond the rear of such vehicles, shall be equipped with the following lamps in addition to other required lamps, have the loads marked. Loads projecting more than 4 inches beyond sides of motor vehicles: (1) The foremost edge of the projecting load at its outermost extremity shall be marked with an amber lamp visible from the front and both sides. (2) The rearmost edge of the projecting load at its outermost extremity shall be marked with a red lamp visible from the rear and side. (3) If any portion of the projecting load extends beyond both the foremost and rearmost edge, it shall be marked with an amber lamp visible from the front, both sides, and rear. (4) If the protecting load does not measure more than 3 feet from front to rear, it shall be marked with an amber lamp visible from the front, both sides, and rear, except that if the projection is located at or near the rear it shall be marked by a red lamp visible from front, side, and rear. Footnote 10 Projections beyond rear of motor vehicle. On motor vehicles transporting loads which extend to the rear four (4) feet or more beyond the bed or body of the vehicle there must be displayed at the extreme rear end of the load, from a half hour after sunset to a half hour before sunrise, and at any other time when windshield wipers are required to be in use as a result of rain, sleet, n=snow, or other inclement weather, a red light or lantern plainly visible from a distance of at least five hundred feet to the sides or rear. The red light or lantern required is in addition to the red rear light required upon every vehicle. At any other time of day there must be displayed at the extreme rear of the load a red flag or cloth not less than twelve inches by twelve inches and so hung that the entire area is visible to the driver of a vehicle approaching from the rear. South Carolina Code of Law - 56-5-4630. Footnote 11 To be illuminated when tractor headlamps are illuminated. Footnote 12 Every truck, and truck tractor shall be equipped with a signaling system that, in addition to signaling turning movements, shall have a switch or combination of switches that will cause the two front turn signals and the two rear signals to flash simultaneously as a vehicular traffic signal warning, required by Regulation 38-392 22(a). The system shall be capable of flashing simultaneously with the ignition of the vehicle on or off. Footnote 13 To be actuated upon application of service brakes. Footnote 14 Backup lamp required to operate when truck or truck tractor is in reverse.