Single Phase 480v lighting ballast

Discussion in 'Homework Help' started by Howard1952, Feb 10, 2014.

  1. Howard1952

    Thread Starter New Member

    Feb 10, 2014
    I have single phase pole lights that need ballasts. I have 3 leads coming from the supply (2 hot and a ground). The new ballast calls for the power to be hooked to 1 480v lead and a common to the other lead of the ballast. I do not have a common from the supply? Do I leave the common from the ballast unhooked?