I don’t use screw-on wire nuts very often, but I still don’t like them very much. They’re not difficult or slow to use, nor are they expensive, so I’m actually not sure why I don’t like them.
What I do know is that I really like using Wago’s PushWire Wall-Nuts connectors (773-series). Wall-Nuts come in several sizes, from 2-conductor up to 8-conductor. I purchased 2-, 4-, and 6-conductor Wall-Nuts and recently started using them on a small project with 16-gauge stranded wire.
Related: We also reviewed Wago Lever-Nuts, which are better but more expensive connectors.
PushWire is fairly accurate as to how these Wall Nuts connectors work. The connectors have an internal spring that spreads and clamps onto wires that are pushed inside.
Step 0: Disconnect power to the wiring
Step 1: Strip off ~0.47″ to 0.51″ of insulation
Step 2: Push connector firmly into connector
Features and Specifications
- 18-12 AWG solid
- 16-12 AWG stranded (19 strands max)
- 22-16 AWG topcoated stranded
- Max Voltage: 600V (building) 1000V (fixtures and signs)
- Max Current: 20A
- Max Temperature: 105°C (221°F)
- Use only with copper wire
- Test port for continuity check
- Built-in insulation stripping length gauge
For temporary installations, Wall-Nuts are removable and reusable when used with solid wire. When used with stranded wire they must be discarded if wire removal is desired.
Wall-Nuts create a very solid mechanical and electrical connection, and there’s no learning curve. Simply strip the wire to a hair less than 1/2″, and push the wire right in.
I suppose the 19-strand limit for stranded wire is because smaller and more flexible wire might jam up and flex instead of forcing the internal spring to open.
I was successful in using 23-strand 16-gauge machine tool wire, and found the connection to be quite strong. Highly stranded 16-gauge speaker wire, on the other hand, would definitely be too flexible to work with these connectors.
Overall, I am quite fond of these push-in wire connectors, and definitely recommend them. If you regularly use screw-on wire nuts, you might want to try a couple of these Wago connectors to see if they work better for you.
These wire connectors (773-series) are available via many other electrical suppliers, such as Newark, which is where I purchased mine from.
Have any of you electricians out there used these or similar push-in connectors? What do you think about them?