Re: In-Sure-Push-in Wire Connectors[WAGO'S]
We use the Ideal push in type that iwire has posted, but we do so ONLY for fluorescent ballast changeouts. Listed or not, I won't use anything but a spring type wire connector, [wire-nut] for building wire. All we use is stranded, so its more conducive anyway.
Perhaps its snobbery on my part, but I don't readilly embrace things not American in origin. By that I mean I apprecieate the robust design of NEMA starters and contactors as pposed to IEC style. It may be a misconception, but our enclosures and stuff in general is larger and gives you more room to wire.