49 Transportation 4 2004-10-01 2004-10-01 false Grounds. 393.29 Section 393.29 Transportation Other Regulations Relating To Transportation (Continued) FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION,DEPARTMENT OF TRANSPORTATION FEDERAL MOTOR CARRIER SAFETY REGULATIONS PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION Lighting Devices, Reflectors, and Electrical Equipment
ยง 393.29 Grounds.

The battery ground and trailer return ground connections on a grounded system shall be readily accessible. The contact surfaces of electrical connections shall be clean and free of oxide, paint, or other nonconductive coating.