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I'm trying to install a wall light to a fixture that simply had a bare bulb. In the box, the two black (ground?) are already wired together. Do I attach the ground from the new light to the two grounds already bound together so all three blacks/grounds are connected to each other? Thanks!

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    BLACK IS NOT GROUND. The earthing connection is bare. Based on the question, I'd suggest hiring this one out to an electrician. – Comintern Mar 3 at 22:34
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    Hello, and welcome to Home Improvement. I agree with @Comintern: given your apparent knowledge, there's nothing we could suggest that might not end in disaster. – Daniel Griscom Mar 4 at 0:11
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    Grounds are always and only green, yellow/green or bare, unless you are doing old work in the former Soviet bloc. I have no earthly idea where you got black for ground, but discard any other information you may have gotten from that source. – Harper Mar 4 at 0:38
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    Weere in the world did you get "black is ground" from!? Also, can you post a photo of the inside of the box? – ThreePhaseEel Mar 4 at 2:10
  • Black is ground in low voltage circuits. Like an automotive system, red=positive(+), black=negative(-). House wiring....like said, hire this one out unless you want to do some deeper learning and understanding. NO shortcuts in 120/240 systems...they can kill you or burn down your home. YIKES!! – Jeff Cates Mar 4 at 18:31

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