PURPOSE: To eliminate the need of providing an assembly lay-out for every frequency of requied power and improve the efficiency of test run by feeding a required power to a conveying pallet from a plurality of power relay slider unit for different power frequencies in an assembly line for domestic electric appliances.

CONSTITUTION: A pallet conveyer power feeding apparatus comprises a pallet 6 which can be transferred along rails 2 by a conveyer 4, a plurality of a.c. power supply lines 12, 12' different in power frequency disposed along the rails 2 and a mover 13 having power relay sliders brought into contact with the respective power supply lines 12, 12'. At the starting end portions of these power supply lines, is installed a device 27 which provides electrical and mechanical connection to said moter 13 and pallet 6, and at the terminal end portions thereof, is installed a device 28 which cuts off said connection. The mover 13 is provided with a transformer 17, a voltage selecting device 18 and a frequency selecting device.