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asr t1_j2q65y8 wrote

That is not a rheostat for lighting, it's most likely removed from the speed control of a motor.


EliminateTimeZones t1_j2q9v50 wrote

That is a dimmer. It says right on the cover dimmer. It's a variable autotransformer in a box,.which will dim incandescent bulbs just fine. But maybe only a hundred or so watts looking at it's size.

I have in my possession several Luxtrol WBD series lighting dimmers with a similar electrical configuration that were removed during a dining room remodel.