S.C. Code Ann. § 58-27-1210 – Extension of facilities; commission approval

(A) When ordered by the commission after a hearing, any electrical utility, distribution electric cooperative, or consolidated political subdivision, may be required to establish, construct, maintain, and operate any reasonable extension of its existing facilities. If any such extension, however, will interfere with the service or system of any other electrical utility, distribution electric cooperative, or consolidated political subdivision, the commission, on petition and after hearing, either may order the discontinuance of the extension or prescribe terms and conditions with respect thereto as may be just and reasonable. Each electrical utility, distribution electric cooperative, and consolidated political subdivision, within areas assigned to it by the commission and within three hundred feet of its lines, as defined in Section 58-27-610, is obligated to comply with all requests for service in accordance with its schedules of rates and service rules and regulations on file with the commission.
(B) Electric utilities, distribution cooperatives, or consolidated political subdivisions shall obtain commission approval of proposed construction of electric facilities only in the following situations where:
1. (1) one electric supplier proposes to construct a line that would cross the line of another electric supplier;
2. (2) one electric supplier proposes to construct a line that is within seventy feet of another electric supplier's line at any point unless the lines are separated by a publicly maintained roadway; or
3. (3) an electric supplier proposes to construct or extend a line through the territory of another electric supplier to or into a municipality.
  No commission approval is required under this subsection where all affected electric suppliers reach an agreement on approval of the proposed construction or where either line is six hundred volts or less.