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seen Jan 26 '13 at 16:42

Jan
26
comment How can I replace my old dimmer switch?
If the feed came through the light. And I don't know how the light was wired, would I still change to black/black? Or would it be best to stay with White/black which has been the case for 20 years?
Jan
25
awarded  Editor
Jan
25
revised How can I replace my old dimmer switch?
edited body
Jan
25
comment How can I replace my old dimmer switch?
Both the black wires, which are nutted together, are hot all the time. If the switch is on (light turned on), neither of the white wires is hot. If the switch is off (light turned off) one white wire is hot, the other white wire is not hot. (to repeat: the two white wires are nutted to the two black wires from the dimmer switch.)
Jan
25
awarded  Student
Jan
25
asked How can I replace my old dimmer switch?