Baomain Universal Rotary Changeover Switch SZW26-20/D202.2D-W with Wider Master Switch Exterior Box 660V 20A 3 Position 2 Phase (3.15"x3.15"x3.7")

Sturdy design. Easy to use. Looks professional.

Very solid product but if you’re using Romex then be sure to buy the larger box version. Almost no room in the small box.

Wish I had taken photos of the install. It was NOT easy. This is a 20A switch, which means you'll need to use 12 AWG wire. But it works as advertised!For my project, I wanted the switch to be able to switch from power from the inverter to power from the grid. That way, my devices (fridge and small electronics) in our camp trailer would be powered no matter the source.So I needed wires coming in from the grid (two go into the box, ground wire stays outside the box)Then wires from the inverter (same deal, two into the plastic box, ground wire outside)Then four wires coming out of the box that lead the AC circuit breaker and house outlets, plus two ground wires outside the box.To wire it all up, those four ground wires got secured with a large red wire nut (max four 12 AWG) and many more wire nuts to the rest of the connections outside the box.But the connections inside the box were the hardest. Getting all those wires through the little cutout holes was tough enough, but then trying to jam the whole front faceplate and box together and screw it all together was harder. Gotta make sure that all your wire is stripped properly (no nicks in the insulation) and you have screwed down the terminals on the switch really well. Fortunately, despite the entire switch being made of plastic (except for the terminals and internal electrical connections obviously), it seems fairly durable for light use. I would not trust it in a really heavy duty situation where it could get kicked or hit, but protected and out of the way seems fine.Since this was in a mobile setting, I used stranded wire. Would probably have been easier with solid core wire. With the tight spaces in there, the risk was too great for a stray strand of wire to touch someplace it should not and cause a short, so I crimped ferrules onto the end of each wire and this made it SO MUCH easier and safer assembling it. Do yourself a favor and buy a kit with ferrules and ferrule crimper.Long story short, I ended up not using the back end of the plastic box. I just left it off and installed the faceplate part that holds the switch anyways onto some 1/2" plywood. This made it way way way easier putting the whole thing together in still a tight space inside the camp trailer under the fridge

This reversing switch was exactly what I needed . Easy to install looks and functions well ⁷⁷

This is a very well built and nice switch. The housing is small, but to fix the problem, we added a junction box and from pig tail wires coming from the rotary switch, we connected all the wires inside the J Box.One issue we noticed that the wiring diagram the comes with it appears to be incorrect. Position 1 connects #1 & #2 lugs. And Position 2 connects #3 & 4 lugs, not as shown on the wiring diagram..

There are two maintainers in my RV, one for the coach batteries and the second for the chassis battery. Occasionally the coach maintainer needs to be off, while the chassis stays on. This rotating switch does the job. It's wired it so that in position #1 chassis only is on; #2 both are on, and #0 all off. While the switch comes complete with a surface mounting box, I chose to remove it and mount it in the recessed electrical box the old switch was in. The face plate was made out of some flat aluminum stock. Switch works great, and appears well built.

This a good switch. It is very compact with the housing it comes with, so for a novice wiring it, they will be challenged! I like the compact size, and it works well.

I bought four of these switches for connecting a few critical circuits in my house to a portable backup generator. The switches are constructed well, but come with no instructions. They're designed for outdoor use, but I used them indoors and can't comment on their weatherproof effectiveness. They come fitted in a small box that makes them difficult to work with when using 14 or 12 gauge wire, so I discarded the furnished box enclosures and adapted them to a pair of 3-gang electrical boxes (two switches to a box) that gave me more working room. The switches have eight terminals labeled 1 thru 8 and each terminal can accept 2 wires. When the switch is set to 1 the top half of the connections are activated, with terminal 1 connected to terminal 2 and terminal 5 connected to terminal 6. When the switch is set to 2 the bottom half of the connections are activated, with terminal 3 connected to terminal 4 and terminal 7 connected to terminal 8. When the switch is set to 0 all connections are off. I wired the four switches to accommodate crossover power from my generator for one 220 V. circuit and six 110 V. circuits. Please consult a certified electrician for wiring details.