My daughter has a very expensive hairdryer with a dual/world voltage adapter within it (110v and 230v switch). Can she cut off the original American plug and replace it with a British plug to use when she goes to live in the UK?? We heard it is possible but don't want to risk it if it will not work.
It doesn't change the voltage, just the configuration of the prongs. A lot of new electronics are 110/220 auto selecting. So a laptop power supply, for instance, might work in Europe with just a plug adapter -- gotta read the labels carefully!
In the past I found that the only thing the voltage switch on a US hair dryer did was prevent you from using it on high position when switched to 220. (Low becomes the new high, and there is no low).
Oh, thank you - that's helpful. She is moving permanently though so we were thinking of cutting off the plug if it's possible - so would she just need to make sure the voltage button is set to 230/240v and use a regular, simple British plug? Does the amp size matter inside the plug?