I am trying to improve my cable management by making my own wires. The ones I got with the primo kit worked fine but are not long enough for where I want to mount the controller. Looking at the forum I found, I saw several recommendations for 18 gage wire, Dupont style connectors, and crimper Wire Connectors Crimper
The 18 gage wire is too big for the connectors. Further reading that even 22 gage may be pushing it.
I tried the connectors on their own and they are not nearly as secure as the original cables.
Used heatshrink wrapped Butt Connectors to extend 22AWG wires to my Controller, and Wago 221-413 within the controller to connect thicker wires. Wagos are great for connecting wires of different gauges, something that wire nuts (found in USA) ideally shouldn’t be used for. I use Wago for both low, and household voltage projects.
Have electrical taped and/or heatshrink wrapped Duponts connectors before to help them not pull apart.
22awg is fine for current from endstops and relays, and almost there for the lower current on mpcnc steppers. 18awg is a good idea for longer runs to the steppers, but you can get away with 22awg if you don’t run them too hard.
It’s good that 18awg doesn’t fit, because duponts are rated <2A. 22awg is a better match.
That’s all stated for copper wire though… beware you have a link to CCA wire… which needs to be upsized to compensate for the resistance of aluminum (also blackwire’s easier). Further, I have purchased several rolls of “tin clad copper” from amazon recently, and it was not copper either. TBH, if you want to make sure it’s real Cu, get it locally at a big box store or similar legitimate vendor.
Connectors… I guess whatever the board and end devices use? That usually includes some duponts, and maybe some jst, and sometimes screw terminals. To adapt thicker wire for motors etc, you’ll need some off-board connector. I like din rail for that stuff, but you can solder/heatshrink or whatever you are comfy with really. Expect lots of vibes/motion/dust whatever you use.
I use this 22ga x 4 cable to all my steppers, with dupont connectors. Amazon.com
You can use electrical tape or 3d printed cases to hold the dupont connectors together, though really, nothing should be putting any pulling force on them.
The motor cable they sell also comes shielded for a price (bigger awg as well), but that’s not really necessary IMHO. Shielding small signals from the noise due to parallel cables carrying large current is a good thing though.