![]() ![]() However, this was not backed up by NASA testing. The book suggested the long tie variant more suited to splices where soldering was intended. Practical Electric Wiring described the splice as having two variations, the "short tie" (figure part D) and "long tie" (figure parts E or F), with the latter examples having a "twist between wrappings allows a better chance for solder to pass in between the wires". The splice wire ends are then trimmed as needed, and the splice may then be soldered, and/or covered (e.g., with a heat-shrunk tube of insulation). The wires are then again held with pliers, but on the first-made twist, to the right of the crossing point, and then the left splice is formed by winding the remaining wire tip toward the worker for a comparable 5–6 snug twists. NASA recommend "tight, with no gaps between adjacent turns". The wires are then held with pliers to the left of their crossing point while the right splice is formed by continuing to wind the wire tip away from the worker, creating 5–6 twists snug against the core wire and against each preceding twist. The short tie splice has it being formed after stripping the insulation from a pair of wires for several inches, each, crossing the wires left over right as shown in figure part A then, a hooked cross (figure part B) is formed holding the crossing point of the two wires, and pulling the right wire tip toward and pushing the left wire tip away from the worker, leaving the tips oriented vertically as shown. The 1915 textbook Practical Electric Wiring describes the construction of the Western Union splice short tie and long tie. NASA included the splice in its technical standard Workmanship Standard For Crimping, Interconnecting Cables, Harnesses, And Wiring, first produced in 1998. ![]() In 1915, Practical electric wiring described it as being, "by far the most widely used splice" in practical electrical wiring work. The wrapping pattern design causes the join to tighten as the conductors pull against each other. This method can be used where the cable may be subject to loading stress. The Western Union splice or Lineman splice is a method of joining electrical cable, developed in the nineteenth century during the introduction of the telegraph and named for the Western Union telegraph company. Sharp's Practical Electric Wiring, with relabeling. This figure reproduces Figures 1 and 2 of J. ![]() ![]() Figure parts E and F show two possible "long tie" variations. Just looked it up, and filed in my bag of tricks.Figure parts A–D show steps in forming a "short tie" Western Union splice. I'd never heard of the Western Union splice. A western union splice will provide the mechanical strength instead of the solder the joint. The solder should not become part of the circuit. You want a conductor to conductor connection. Additionally, the wire splice should be a western union type twist not jamming the strands together then soldering and relying on the solder to provide the mechanical strength. A low wattage soldering iron will only melt the insulation while trying to get the solder joint up to soldering temperature especially if working outdoors in windy conditions. And for heavy gauge wire a 100watt plus soldering iron or gun is needed for fast heating. For soldering thick wire in this manner, paste flux is not needed if one uses a heavy gauge flux core 60/40 tin/lead solder. ![]()
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