Originally Posted by
Efrem
We are talking about peak (not RMS) voltages that could exceed the breakdown voltage of the internal insulation of cords used in U.S. lamps. This is not something worth taking a risk on, given the trivial effort and/or cost involved in rewiring a lamp.
Most US off-the-shelf electrical wire, including the popular zip cord used in wiring lamps, is rated for both 110v and 220v. I think I mentioned that earlier in the thread, but maybe not.