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THE BELL SYSTEM TECHNICAL JOURNAL, MAY 1953 



Fig. 34 — Stranded wire connection. 



along the serrated edge of the terminal and then wrapping both the 

 terminal and the strands with solid wire. This is shown in Fig. 34. A 

 stranded wire may also be wrapped in the same manner as a solid wire. 

 However, the strands of the wire to be wrapped must be dipped in pure 

 tin in order to bind the strands into the equivalent of a solid wire. A 

 test was made on a No. 24 (0.020'' dia.) wire having seven strands and 

 three twists per inch. The preliminary resistance and aging tests have 

 shown connections of this type to be good. 



Enameled wire also has been wrapped. The tool for this purpose has 

 a combination edge at the wrapping tip. Part of the edge has an arc 

 for producing the wrapping tension and the other part has a scraping 

 edge for removing the enamel from the underside of the wire as it is 

 being wrapped onto the terminal. 



1 2 



FAHNE STOCK PLUG 

 CLIP 



SCREW SOLDERLESS 

 WRAPPED 



0.0148" 



N0.15 0.040"DIA. 0.120" DIA. 0.350"DIA. NO.4-40 x 0.062" 



PIN X0.112"L6. X 0.550" LG. (0.112") TERMINAL 



CONTACT FORCE 

 IN POUNDS 



CONTACT AREA IN 

 SQUARE INCHES 



CONTACT PRESSURE 

 IN PSI 



SPACE 

 10* CUBIC MILS 



ELASTIC ENERGY 

 IN MIL-POUNDS 



Fig. 35 — Comparison of pressure connections for No. 24 (0.020") wire. 



J 



