Joint and welding son is a basic skill that any DIYer can master, but it all starts with a strong connection between the two son. This is where the splicer installer comes into play.

Connecting two wires can be done with a wire stripper and insulation tape, but to make a proper connection you need to weld together, or at least use wire nuts. Cable nuts are screwed in a clockwise direction at the end of a pigtail or back splicing, curved as shown in the video above. Cable nuts connect and protect the child, but often an in-line splice technique will be needed that does not change the diameter of the wire.

The line installer or Western Union splice (which was developed during the introduction of the telegraph) is an in-line cable connection technology that connects two wires together so that if the child separates, the connection tightens. It shows 2:02 of the video above.

According Convert this splicing is the preferred connection method for NASA. Here’s how they are suggested to do so (referenced from NASA’s 8739.4-STD page):

Drivers must be pre-tinned.
There must be at least 3 turns around each conductor and the envelopes have to be tightened and no spaces between the adjacent turns.
The envelopes do not overlap and the ends of the casing must be cleaned before welding to prevent the protruding ends.
The conductors must not overlap the insulation of the other cable.
Twisting the rather narrow son can be difficult, and then consider the installer of “modified” splice lines shown at 58 in the above video. This wraps the child together and then writhes about itself.

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Enjoy your strongest connections and ready to use.