WAGO 221-615 | Lever Nut Wire Connector – 5-Conductor, Compact & Tool-Free – ...

Not recommended for nobody. Highly risk of fire.

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I find these to be a great improvement over wire nuts. I read another review that did not like them because the wires had to be "straight". This is quite true, all you have to do is pinch the solid wire a couple of times with your Kleins electrical pliers to flatten them out. (This is less critical when using stranded wire.) I wanted to explain this to the reviewer but sadly comments are no longer permitted. Wire nuts are not too difficult to work with when you have brand new wires in a new installation where there's plenty of extra wire to work with. However, when you're reworking an old junction box twisting these short wires together can be quite a chore. I find it much easier to flatten out the ends (as shown on the Wago box) and insert the wires. Also, if you ever have to go back and rework your connections they come apart with almost no effort. I find that when the wire ends are new, or flattened out, the wires are unlikely to pull loose. You can see some videos online where people intentionally put excessive current through these connectors as a test. I saw some 20 amp rated Wago start to melt at around 100+ amps. This is very close to the melting temperature of 12AWG wire itself. It is true, that a well done set of twisted wires with a wire nut can withstand a bit more current, but the safety factor with Wago connectors seem more than adequate. The significant improvement in making connections and taking them apart is well worth a very slight reduction in current carrying capacity. With Wago connectors you get: Visual Confirmation of Electrical Connections Easy wire removal and replacement Can be used to connect solid and stranded wires Combine wire sizes with confidence You might be interested to know that wire nuts are pretty much exclusive to North America. Wago connectors are common in Europe, with millions upon millions being used (just like wire nuts in North America). Also, watch out for Wago imitations. There are many ways to save money in life, electrical connectors is NOT one of them.