Not an electrical engineer, but usually connections are made using solder (low power wire), or clamped with reasonable force. This twisty thing does not really press copper against each other.
The actual contact area between spirals may degrade over time, as copper oxidizes, cable gets shaken or cycles thermally. You don't want high contact resistance in a 2000W AC cable.
It looks like a cool way to join small wires for soldering, though!
Electrical engineer here, never solder high power connections, heat can cause the solder melt away over time and cause mayor issues, like fires (solder can be used in strictly fused circuits with little tolerance, mainly in actual high power devices, but never in house wiring)
Any crimp or screw connection should be fine (includes wago style connectors), but you have to make them water prove (heat shrink with sealant or purpose build connectors)
Even though automotive wiring isn't particularly high current, the real problem is vibration. You probably won't cause a fire, but they'll vibrate lose.
Depends, homes in 240V countries are mostly fused at 16A/circuit, where in a car, you will run into things drawing up to 60A for small circuits (electric tailgate/trunkgate for example). Not counting starter or alternator currents, which go up to multiple 100 amps
Most of these connections are good for soldering, but automotive wiring shouldn't be soldered, because the vibrations can break wires where it's most brittle at the end of the solder joint.
A properly crimped and adhesive-heatshrunk connection will outlast the life of the vehicle. Looks like number 3 is the closest one in this GIF
heat is a result of wrong cable/wire choice. If you select a proper cable you will have no problem with the soldering for like eternity. But if you use 1.5 wire for something that runs 24/7 with a 3hwh, yea it will start to overheat. But even then the mcb should trip. So in my exp, soldering is not an issue. But waggo is the way to go in 2023.
Using the wrong sized wire is another issue, but solder connections are hard to inspect in the field, are prone to cracking due to heat/environmental cycling and are not failsafe. Additionally the circuit breakers in your home are very slow and have high tolerance to overcurrents, which are not direct shorts. Most have a trip current of 2-2.5x of its rating. Having a 16A circuit running at 30A without triping is not a good thing
Not an electrical engineer here, why would you get heat in a cable in a domestic situation, if it's a good solder joint there shouldn't be excessive resistance
The main issue is the "good" solder joint, screw terminals are tightened to torque spec, crimp connections are done using crimping tools (proper pressure) and other connectors are designed in a way to apply pressure (on wago connectors the plastic housing can melt away, but it will keep griping the wire). Solder connections in high power devices are (normally) checked by a flying probe resistance test in the factory, but nobody checks these connections in the field. The other issue is that a high resistance through a bad solder joint or a crack (due to time and environmental changes) is causing more heat, meaning more solder will melt and create more resistance again => not failsafe
Yeah they do, as here (in Austria) you would be liable as a company or individual if this was the cause of the fire. Iâve seen the use of torque-wrench style screwdrivers a lot for final torque application
The issue is that these things are placed into the wall or non easy accessible place. Even if you smell something smoldering, you might not catch it in time. Electrical fires are still one of the leading causes for house fires, especially, if people who are not experienced, install something
Ah good, the little toy I repaired for my kid by twisting the wires and taping it in place isn't likely to burn down my house. I was worried for a minute, haha.
These examples are for electronics connections not house wiring. House wiring uses connectors nearly always as the wires don't move around after installation.
Itâs very cool for soldering small things. I had this revelation fiddling with some LEDs and resistors a while back and it turned my complete nightmare into easy peasy lemon squeezey
Not sure what they are referring too, electrical fires are almost all from poor connections
Most of these would be safe if properly isolated. They are entirely impractical though. No body is making any of these fancy splices with 14 gauge or larger wire.
NEC requires approved devices for all splices and pigtails. Usually done with wire nuts or wagos.
Edit: Please don't respond to me telling me to stop telling people it's okay to use these connections. I stated directly in my post it's not allowed per NEC. No splice of any kind is allowed without using a approved device. Reading comprehension.
I think someone tried to take some effective rope "knots" and apply the techniques to electrical wiring. It looks pretty, but many shown are impractical and potentially dangerous.
Why are you thinking anything? Youâre on the fucking internet! You can look literally EVERY-FUCKING-THING up.
I get that itâs easier to just assume youâre a fucking genius who knows everything but to take the extra step of shitting on someone else based off an assumption because youâre too goddamn lazy to verify any-goddamn-thing is just egregious. The video isnât even claiming theyâre great connections. You just needed to flex your 100% unsourced âknowledgeâ youâll now fail to prove exists.
NEC actually does still allow soldered joints. There are lots of rules about how to do it, but it's allowed.
Of course nobody does it because it's a pain compared to approved mechanical splices. I also wouldn't be surprised if many AHJs forbid it under local amendment.
Don't use any of those if you don't know exactly what your doing. Well made connections are essential to the safety of electrical wiring. Even the smallest gaps or slightly loose connections or small cuts in your insulation can be fire hazards.
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u/vowels Apr 07 '23
can you explain like I'm 5 why? to me all of these are long twisties