How can I convert a 120V chandelier to 240V?
The wire is usually rated for 600V; check that first if it is and you can find lamps that fit the sockets at 220-240V with the same wattage or less than the maximum wattage. If lamps that fit at the correct wattage are available you could connect the black wire center pin on the fixture to your hot and the white wire to the neutral conductor or shell and last if a metal fixture connect the ground from the fixture to the service ground and it should work. There are sockets to switch from U.S. base to European bases so that bulbs from overseas can fit.