Send E-mail Get Price. Tel : +86-373-5289556. Share With: Product Description. The electric transfer cart is powered by the low voltage rails, which have been insulated, the ground control box input the electricity and guide it to the two/three insulated rails, then the insulated wheels conduct the electricity from the rails into the electrical appliance box installed on the bottom of the carts so that control the transfer cart to start, stop, go forward and backward and adjust the speed etc