sub-conductor
/ˈsʌbkənˌdʌktə/noun
1 Military. Originally: an assistant to a conductor. Later also: an officer ranking below a conductor. Now historical.
2 Music. An assistant or deputy conductor of an orchestra, choir, etc.
3 Electrical Engin. A subsidiary or subordinate electrical conductor; specifically each of a number of separate cables physically connected but electrically distinct; each of the cores of a multicore cable.
Origin
Late 18th century; earliest use found in George Washington (1732–1799), revolutionary army officer and president of the United States of America. From sub- + conductor.