Joining a wire to a terminal screw is a simple procedure. But it's worth a few minutes and a little practice to learn how to make a secure connection. Terminal connections come under a lot of stress when devices such as switches or receptacles are pushed into boxes, and a poor connection can come loose. Wrap the wire almost all the way around the screw before tightening it. Make sure to wrap the wire clockwise around the terminal screw so that as the screw tightens it pulls the loop in. In an ideal connection, all the wire under the screw head is stripped and no more. Most homeowners use long-nose pliers to bend a loop in the wire, but if you plan to install a number of devices, consider purchasing a wire-bending screwdriver.