Western Union splice
Method of joining electrical cable / From Wikipedia, the free encyclopedia
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Not to be confused with Lineman's loop or Butterfly loop.
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.[3][4] This method can be used where the cable may be subject to loading stress. The wrapping pattern design causes the join to tighten as the conductors pull against each other.[5]