Juan for the road
New Member
This metal box will need to be bonded to the largest equipment grounding conductor. This will be a #10 that is either in the 10/3 or the 8/3 cable.
I don’t understand just how you are installing these cables. If this box is a junction box then there should be an even number of each cable unless you are pulling the cables straight through the box without a splice or joint.
In this case either the 10 or the 8 will need to be opened to access the equipment grounding conductor.
Yes,these wires were run into an attic for future use and just terminated into a large metal box and wire nutted.(the reason for the odd number).
If a box is not equipped with a ground screw or other means of grounding,what is the proper way to ground it?