S.C. Code § 7-13-1680
The governing body of any county or municipality providing voting machines at polling places for use at elections shall provide for each polling place at least one voting machine for each two hundred fifty registered voters or portion thereof or as near thereto as may be practicable. The machines shall be of the type approved as provided for in this title and shall be kept in complete and accurate working order and in proper repair. The machines may be used in such election districts or precincts in the county or municipality as the officials holding the election or conducting the primary may determine. The governing body of the county or municipality owning the machines shall have custody of such machines and other furniture or equipment of the polling places when not in use at an election.
S.C. Code § 7-13-1680