I'm investigating the issues related to long term reliability of pluggable terminals of "Phoenix" style. This terminals are available in a range of pitch and configurations (right angle, straight...). Look at the picture as example.
In my application I need to supply a control card with power in excess of 10A. Currently the wire coming from the power supply is simply stripped and put into the terminal plug and then fastened with the terminal screw. Is this method considered safe and reliable over many years of use? The environment is clean and stable, no relevant vibrations. Would it be better to pre-tin the stripped wire before screwing it into the terminal? Or should I use single wire terminals like the ones in the picture? Or would it be better to use a pluggable connector which is itself crimpable? I am aware that for reliability reasons, crimping should be preffered to soldering. Am I right?