- 1). Strip about 1/2- inch of insulation from the ends of the lines you want to solder. You want enough length to be able to work with, but not so much that the length becomes too awkward to twist.
- 2). Twist the uninsulated ends of the lines together. Twist them securely in place. While the solder will ensure a good electrical connection, it is a proper twisting job that will ensure a good mechanical connection.
- 3). Hold the lines by their insulated sections. Place the heated tip of the soldering iron or soldering gun on the twisted and exposed section in order to heat the metal. Contrary to a common belief, it is the hot metal of the electrical lines that will melt the solder, not the tip of the iron. So make sure you get the twisted lines sufficiently hot.
- 4). Touch the solder to the heated and twisted exposed lines. The solder will flow over the wire.
- 5). Hold the lines securely, without moving them, until the solder cools. Cooled solder becomes dull and less silvery.
- 6). Bend the soldered section to one side until it is parallel and flush with one of the sections of insulated line. Insulate it with black electrician's tape.
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