[Al Skierkiewicz]

Oliver,
Moved the thread.
These types of terminations are commonly know as 'wire nuts'. Some have a spring inside and some have no metal inside. Like the WAGO terminals, there is a specific strip specification when using these connectors. If you strip too much, conductors are not insulated. If you strip too little, the wire nut falls off. While I have seen these used on robots, they are legal but not appropriate in many cases. I suggest that teams make as few splices as possible especially in high current conductors. Each splice a person introduces, also adds one more point of failure and higher resistance in the path. As noted most are designed to terminate both stranded and solid conductors. However, they are generally not recommended to mix conductors in the same termination. I would certainly question any splice on #6 wire using these connectors.