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Question DetailsAsked on 2/2/2017

ceiling light ground wire installation

Hi I am looking to install a basic ceiling light. I connected the black wires and the white wires together. My only questions is with the groundwire. if there is a groundwire coming from the light fixture and a groundwire coming from the ceiling can I bypass using the green screw on the mounting bracket? Or should I wrap the ground wire from the lighting fixture around the green screw a few times and then connect it to the ceiling ground wire with a wire connector?

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2 Answers


If you have submitted this question recently under another user name in hopes of getting different answers, my apology - there have been several very similar questions about this recently - below are a couple of the links for you - but in summary, do connect the mounting bracket into the grounding - your way is one of the many possible ways to do it, if the wire from the fixture is long enough - just be careful not to damage the probably stranded wire because if it turns under the screw it will shred it real quickly. With the type of green screw on manyh brackets where the cup washer is part of the screw, that will shred the wire real quick, so you have to put another flat washer under the screwhead washer so the wire does not turn with the screw - take a full 360 around it and on to the wire nut with the circuit ground wire (after taking into account the discussions on box grounding if metal box).

One thing the other comments may not have made clear - you get zapped touching live wires (which hopefully will not happen if wire nuts are used right and are the right size for the size and number of wires being tied together), or by touching something conductive which a live wire is contacting. By grounding all metal components, hopefully any live wire touching one of them will trip the breaker by grounding out to the ground wire, or by tripping a GFCI if there is one in the circuit (usually not on lighting circuits). Without that grounding of all conductive (metal or metallized coating) elements, there is the risk that component could be "live" because a bare live wire is touching it and has not been grounded out or tripped out a GFCI. That is what grounding primarily tries to avoid - forcing the breaker to trip sothere will not be undetected "hot" elements in the system.

Answered 3 years ago by LCD



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Answered 3 years ago by Member Services

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