 The first trial run under the new voltage system in South Korea was conducted with a Class 8000 electric locomotive on the Jeongsan–Gohan section, then called the Gohan Line, on June 9, 1972.Regular electric service started on the long Jecheon–Gohan section on June 20, 1974.The rest of the line was electrified together with the section of the connecting Yeongdong Line until Donghae on the east coast, altogether , on December 5, 1975.