I have this cable running out of the wall in my garage to a light bulb. I'm looking to upgrade my garage lighting to actually be shop lights. I want to rerun the cable so that it comes out of the wall into an electrical box. The new cable will come out of the box into nonmetallic liquidtight conduit which will run to the center of the garage ceiling terminating at an outlet. The roof of the garage is unfinished.
I attached some images so you can see what it looks like right now. The wire currently just goes from the wall through a joist to a light socket.
My question is do I need to use a wire clamp for the wire coming out of the wall or can I just screw the box to the wire with the punch out over the wire coming out of the wall.
This is what I mean by clamp.
Here are pictures of the wire coming out of the wall to the light socket.