jglazer
jglazer t1_ixlfq98 wrote
Reply to Lighting Install Question by hahvaggevabba
If you have BX cable (metal conduit around the loose wires in the wal) the conduit is usually grounded. If it attaches to a metal box, that grounds the box too, so typically you’d want to attach the green wire from your new light to any screw on your old metal box. If you have a voltmeter you can test the voltage between your hot (black) wire and your metal box- if it reads 120 (assuming you’re in the US) it means your box is grounded and you’re good to go.
The grounding wire exists for safety so that if you lose your neutral connection for some reason, you don’t get shocked touching the light. The light will usually work without it, but you’re taking a risk that it would be safer not too.
Good luck!
jglazer t1_j2csycq wrote
Reply to comment by madogson in Somewhere down the evolution, we lost the skill of passing messages through peeing in bushes and corners. by [deleted]
It would explain the sliding window