Paralleled Wires Picture Wires used on transmission lines are large un-insulated stranded aluminum wires. The large wire is made up of a series of smaller wires twisted around each other, hence the name "stranded" wire. Some of the wires are almost as large as your wrist. You may notice some transmission lines that appear to have two or three smaller wires held about 6 inches apart at the tower by a small connector. These two wires are "paralleled" meaning they are part of the same circuit and connected together at each end. This is done because many times it is less costly to use two or three smaller wires rather than one large wire.