1: component supply device; 10: tape feeder; 11: main body section; 13: front tape feeding mechanism; 131: first feeding motor; 14: rear tape feeding mechanism; 141: second feeding motor; 17: control device; 173: command section; 174: display section; 1A: pallet member; 2, 2A, 2B: power supply control device; 21: consumption current acquiring section; 22: total consumption current calculating section; 23: instruction receiving section; 24: determination order control section; 25, 25A, 25B: operation controlling section; 26: priority order control section; 27: output current limiting section; 27B: total consumption current measuring section; 28: setting command section; 29: communication section; 35: control wire; 41: machine-operation-use power supply device; 42: changeover-use power supply device; 9: component mounter; 92: board conveyance device; 94: component supply device; 95: component camera; 96: control device; Icap: output current capacity; Itot: total consumption current; Im, Im(k), Im(j), Im(x): operating consumption current; Inow: current state consumption current