S.C. Code Regs. 38-393.27. Wiring specifications

(a) Wiring for both low voltage (tension) and high voltage (tension) circuits shall be constructed and installed so as to meet design requirements. Wiring shall meet or exceed, both mechanically and electrically, the following SAE Standards as found in the 1985 edition of the SAE Handbook: (1) Commercial vehicle engine ignition systems SAE J557 High Tension Ignition Cable. (2) Commercial vehicle battery cable SAE J1127 Jan 80 Battery Cable. (3) Other commercial vehicle wiring SAE J1128 Low Tension Primary Cable. (b) The source of power and the electrical wiring shall be of such size and characteristics as to provide the necessary voltage as the design requires to comply with FMVSS 571.108. (c) Lamps shall be properly grounded.