Electricity for the 4-H Scientist

by Eric B. Wilson

4. A good connector plug cap, preferably with a clamp-type grip for the cord

5. A rough service lamp bulb

6. Solder and flux

Steps to Take:

1. Remove about 2 inches of the outer covering of cord at one end.

2. Separate the wires and cut away the filler material.

3. Remove 3/4 inch of the conductor insulation from the end of each wire and tightly twist the strands together to form a firm conductor. Be careful not to cut any of the fine wires. Ends may be soldered.

4. Slide the plug in position on the cord.

5. If there is no cord grip, tie the underwriters' knot (Figure 1). If there isn't room enough, make an "S" loop by passing the wires around the prongs before fastening them to the terminal screws as explained in the next step.

6. Loop the bare part of the wire around the screw in the direction the screw is turned to tighten (clockwise direction). This will prevent the wires from being forced out from under the head of the screw as it is tightened. Now repeat with the second wire, wrapping it around the other prong of the plug.