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When assembling an electronic enclosure and wiring, I encounter a section which I share the diagram below:

enter image description here

So as you see above there are three switches where some of pins are connected each other.

And here how they look like in real:

parts

If I solder pin x to pin y how can I obtain the z output? I though of soldering x to y and also x to z but seems not reliable.

Same with p q and r. One pin can only take one wire so it seems not a good idea to solder two wires into pin p.

So I'm stuck with how to realize the schematic in practice by soldering or any other trick/tool/part. What could be a robust reliable solution?

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  • \$\begingroup\$ So connect the tail, or Z, at X or Y. \$\endgroup\$
    – Solar Mike
    Jan 7, 2023 at 18:27
  • \$\begingroup\$ x and y are pins to be soldered and they can take only one wire in. you mean tail from x and tail from y and z to be combined? But Im asking "practically" how? By special screw or solder ect? \$\endgroup\$
    – GNZ
    Jan 7, 2023 at 18:52
  • \$\begingroup\$ Two tails could be twisted but in this case three tails needs to be combined. \$\endgroup\$
    – GNZ
    Jan 7, 2023 at 18:56
  • \$\begingroup\$ I have been known to solder one wire to each face of the pin - depends on your soldering skills though. And have also managed 4 wires: two on each side. Don't overheat though... \$\endgroup\$
    – Solar Mike
    Jan 7, 2023 at 18:56
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    \$\begingroup\$ For the right-most switch, I would solder two wires through the hole in the tab. For the center, I would also solder two wires in one pin. It is very common to solder more than one wire to a switch or connector terminal. \$\endgroup\$
    – Peter Bennett
    Jan 7, 2023 at 19:30

1 Answer 1

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As I mentioned in my comments, these are three different devices, which have their own unique specifications and terminal types.

The one on the right has three terminals, each of which has elongated holes which can accommodate two or more wire strands. It appears to be a low current device so #22 AWG should be sufficient.

The device on the left has two fairly substantial quick-disconnect (QD) terminals, and the proper crimp lugs may be the best way to connect wires, but solder can be used as well. However, they are often nickel-plated and can be harder to solder, and too much heat may melt the body of the component and damage its internal parts.

The item in the middle almost certainly is a connector, and it has cup type solder terminals which require some skill to properly solder. They appear to be rather large and the connector is probably rated 15 amps or more, so #16 AWG or heavier wire may be needed. It is probably not a good idea to attempt connection of more than one wire to each terminal. Here is an manufacturer's sheet about such connector pins, and a video tutorial on proper soldering technique.

Cup type solder terminals

https://www.mill-max.com/products/new/solder-cup-connectors-and-terminal-pins

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    \$\begingroup\$ Those old school soldering videos are often great. Although regarding soldering of the connector, also make sure it is fixed (in a vise or equivalent) before soldering. What they didn't mention either is that you should apply solder to the wires too after peeling them to the correct length. \$\endgroup\$
    – Lundin
    Jan 9, 2023 at 8:07

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