S.C. Code § 23-13-270
When any industrial corporation controls and operates more than one industrial plant in any county in this State or when more than one industrial plant in the same county is controlled and operated by allied or affiliated corporations or corporations which are under the same general management or are under the same general stock ownership and the sheriff appoints a deputy sheriff under the terms of this article for any industrial community and locality in any such chain or series, the sheriff may give any such deputy sheriff additional jurisdiction under the terms of this article over any or all other communities or localities of such chain or series, but such additional jurisdiction shall not become effective until the sheriff shall have made such appointment in writing naming all of the communities and localities in which such appointee is given jurisdiction.
S.C. Code § 23-13-270