Can push in connections handle 20 amp circuits? The box claims that 22 to 12 gauge wire can fit, but little else. Sorry if this is a silly query.
As long as it is rated for it, it can handle it. I use these IDEAL push connectors ALL THE TIME.
Push-in connectors such as the Ideals linked in another answer or Wagos are rated for wire size, NOT amperage. If it can accept a #12 wire then it is safe to say it can be used on a 20A circuit.
Many connectors are rated for 20A, If you worry about push-in connectors, try something like this
WAGO 222-413 3 Conductor Terminal Block with Levers
No. of Positions 3
Rated Voltage 600V
Rated Current 20A
Wire Size AWG Min 28AWG
Wire Size AWG Max 12AWG
Wire Connection Method Push In Lock
They have a handy guide on the back for insulation trimming.
Just keep your fingers out of the way when releasing the tiny orange levers!
Wago website gives all of the specs but we must think beyond the specs to be on the safe side. Reasons are many beyond the specs, for instance, the 8 or actually listed as 7 terminal although there are 8 holes plus the feed line is rated for 24A however, I wouldn't suggest anyone use them near anything hot such as a light fixture unless there is ample distance. Rated at 60C things can reach hot temps and over the course of say, maybe 10 years or so the plastic will become brittle due to this. Wago is an excellent connection for a box that is not going to have added heat or weathering due to sun or water etc...
I don't care what wire nut heads say Wago has beautiful products and they do work if used correctly and save you a lot of time. Often the problem I find with wire nuts is that far too often people simply don't strip old connections back. If you look at the wiring with oxidization on it yes sure it is copper but over the years as this build up happens there is a loss at this connection. What most folks complain about is having to strip a little casing back or shorten the wires. let me tell you if 6 inches code doesn't get it done for you for the life of your home you should be more than happy you made it to that point! Learn how to work it ;).
Their specs are actually pretty spot on and they meet code there are a lot of naysayers out there but don't listen to them. Do NOT use them around another source of heat and do not exceed 20A and they should last a lifetime! Also, what is the deal with people not educating each other VxA=W simple grade school formula tell them not to exceed the wattage rating of their wire and circuit? Every homeowner should be required to know this information! Instead, we like to keep people in the dark so we can pinch them for all they have where does it end we are talking about someone's life possibly versus dollars. Teach anyone and everyone the basics it should be a requirement in high school actually!
They are excellent connections and they only time I have ever seen them fail was around another heat source, or if someone overloaded the circuit. Know the connector, not all are rated for 24A some are rated for more like the clampdown series but many are rated for way less. In the specs, it will tell you wire size, amperage and more. It will accept #10 wire but why push it just stay with 12 wire and 20A to be safe with the dark grey 8 hole terminal connector. As a general rule anything run at max rating is pushing it best to stay under that a fair amount. They work don't believe the rubbish if people want arthritis and carpal tunnel and want to spend their day twisting away let them you don't have to!!! But be sure to follow the guidelines and specs and look at other data beyond that to make an informed decision you can wire nut your way to the heavens for all I care but I'll use these push in connectors and sleep well at night after 15+ years of doing so.
Yes they can & do. Although, the only kind of "push connector" you want is a Terminal Block, it's push-in & then screw-down clamping, they're the best of both worlds & come in all shapes, sizes & colors. If it's just push alone, return it & never buy them again. They aren't easily correctable, re-usable, reliable nor long lasting & therefore not trustworthy. That being said though, I've used Wago's just a few times & their locking arm version did seem to be an upgrade to address some of my issues, but those versions aren't "really" push-ins either. I can't yet speak to Wago's reliability nor longevity.