Put the short pieces over the longest individual wires the object here is to get them as far away from the soldering as possible so they don’t shrink prematurely. Put the large piece over the jacket and slide it several inches away from the splice area. For the final jacket, I cut the tubing at least an inch longer than the total length of the spliced area. Choose shrink tubing the smallest diameter that will fit over your intended area, and somewhat longer than the splice. We are going to use two different sizes of heat shrink tubing: First, a small size to insulate the individual splices, then a larger size to cover and protect the whole repair. If you want to make splices like a professional, this is what you want. Heat-shrink tubing has got to be the greatest electronic invention since the transistor: Tight seal, conforms to irregular shapes, no gooey mess as one sometimes gets from tape, and more permanent than tape. While this will probably improve the neatness of the splice, it makes the wire much stiffer and harder to bend and twist, so I did not do this on my demonstration project. The NASA method calls for the wires to be tinned (Coated with solder) before splicing. Of course, this will increase the total length of the splice. If splicing a cable containing more than two wires, stagger all the lengths by a similar amount. When you are done, the wires should look like the second photo. Now, on the other end, cut 1/2″ off of the opposite wire – In other words, if you cut 1/2″ off of the red wire on the first end, cut 1/2″ off the white wire on the second end. 1/2″ – 5/8″ works well for small gauge wires.) (These dimensions will vary depending on the thickness of the wires you’ll be joining. On one cable end, cut one of the inner wires about 1/2″ shorter than the other. The wires here are color-coded, so we’ll be joining white to white, and red to red. If the cables you’re splicing have a jacket, gently strip about 1 1/2 inches of the jacket on each cable end, being careful not to nick the inner insulation. I’m using a laptop power cord as an example. This accomplishes two things: It reduces the possibility of a short circuit if your insulation method fails, and reduces the bulk of the splice so you don’t have a huge unsightly glob in the cable (also making it easier to thread the cable through holes if you need to). The important thing to do when splicing a multi-wire cable is to stagger the splices of the individual wires. If it’s good enough for NASA, it’s definitely good enough for us! Unlike ordinary twisted splices, this style has a very high tensile strength, which is why it’s the preferred method of NASA. The kind of splice we’re going to use is a modified Western Union or Lineman splice.
#Western union splice solder how to
The best splices are soldered, so knowing how to solder is essential in electronics. Despite the title, you don’t have to be a Rocket Scientist to make a neat wire splice and do it right.
Such practices will only result in heartache down the road.ĭo you want to make a strong, reliable, secure, neat connection in a 2-wire (or more) cable? This is not that hard. How many times have you seen a wire splice where the wires are sloppily twisted together and insulated with electrical tape, or worse, yet, masking tape? A Plague Upon such slipshod methods! Don’t even go there. Often, in the world of electronic experimentation or repair, there’s a need to splice a wire or a 2-wire cable.
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