Nikola Tesla Books
WELDING TRANSFORMER 217 quirements of the performer. For this reason the author suggests that the worker make his own cable, and the appended illustration (Fig. 11) shows how this may be done. A coil of No. 24 bare copper wire is cut into sufficient ten-foot lengths to make up two bundles of wire each inch in diameter when the wires are tightly bound together. The end of one bundle of wires is forced into a substantial lug and very carefully soldered to insure that a perfect electrical connection is made. This lug is then gripped in a vise and the wires are stretched individually and collectively along the bench with the ends held securely when the stretching has been done. A wrapping of cotton tape is then wound throughout the entire length of the cable starting at the end with the lug and finishing temporarily three or four inches from the other end where the tape is bound with wire to keep it from unwinding. Again starting at the lug end, a layer of fine, hard fish line is wound around the cable and over the tape, finishing the covering of the cable. Before cutting the tape and line at the finishing end the wires are to be cut off squarely and inserted into a second lug which is carefully soldered as in the case of the Final wrapping of fish line tujgt Wrap with cotton tope Bind and solder info lug Cable a bundle of N° 24 bare copper wires to form conductor inch thick Fig. 11. Showing construction of cable to carry the heavy secondary current
