S.C. Code § 7-13-1460
If a method of election for any candidate or office or of voting on any question is prescribed by law in which the use of vote recorders is not possible or practicable, or in case at any election the number of candidates seeking nomination or nominated for any office renders the use of vote recorders for such office at such election impracticable, or if for any other reason at any election the use of vote recorders wholly or in part is not practicable, the county election officials may arrange to have the voting for such candidates or offices or for such questions conducted by paper ballots. In such cases, paper ballots shall be printed for such candidates, offices or questions, and the election conducted by the poll managers herein provided for, and the ballots counted and return thereof made in the manner required by law for such nominations, offices or questions, insofar as paper ballots are used.
S.C. Code § 7-13-1460