49 C.F.R. § 393.28 Wiring systems.
Title 49 - Transportation
Electrical wiring shall be installed and maintained to conform to SAE J1292—Automobile, Truck, Truck-Tractor, Trailer, and Motor Coach Wiring, October 1981, except the jumper cable plug and receptacle need not conform to SAE J560. The reference to SAE J1292 shall not be construed to require circuit protection on trailers. (See §393.7(b) for information on the incorporation by reference and availability of this document.) [70 FR 48047, Aug. 15, 2005]
Title 49: Transportation
PART 393—PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION
Subpart B—Lamps, Reflective Devices, and Electrical Wiring
§ 393.28 Wiring systems.
