Can a 120V UL rated dimmer switch be used on a 240V dedicated line that is providing power to a UK built light fixture that uses UK light bulbs?
== == === === == == No. Do not use a 120 Volt rated device for
240 Volt service.
All equipment on 240 volt circuit must be rated for 240
volts. Consider changing to a 120 Volt circuit and locating 120
Volt lamps with a base made to fit the fixture.
I have several customers who have brought fixtures back from
Europe and needed 120 volt lamps with a European base.
As always, if you are in doubt about what to do, the best advice
anyone should give you is to call a licensed electrician to advise
what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact,
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.