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I am installing a flush mount fixture, but the house wiring has only three wires while the light fixture has four--a black, white, copper and yellow (see photo). I'm wondering if I should cap off the extra or ground it. Any ideas?
What does the installation instructions say about that wire ?
A green stripped wire could indicate a ground but without knowning what the fixture is and what that 4th wire is for ---- can't say for sure.
The instructions say nothing and I haven't been able to find anything online either. The manufacturer is Forecast Lighting.
If you have an ohm meter you might check to see where there is continuity to that wire on the fixture.