S.C. Code Ann. § 58-3-145
The Public Service Commission shall notify the Chief Justice of the South Carolina Supreme Court of all pending contested rate matters where the amount in controversy in such rate matters is in excess of one million dollars annually. The Chief Justice, when so notified or when otherwise requested to do so by the Chairman of the Commission, shall appoint a circuit judge to preside over the hearings in such cases. Such judge shall have full authority to rule on questions concerning the conduct of the case and the admission of evidence but shall not participate in the determination on the merits of any such case.
During the conduct of such hearings, the judge shall have the same authority to control the proceedings and the conduct of participants therein as he would have in proceedings being heard in the circuit courts of the State.