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Perfect for homeowners who need a simple, safe, and efficient way to switch between utility and backup power during outages or emergencies.
Engineered for maximum reliability and seamless operation, this manual transfer switch ensures your home stays powered, even during the harshest weather events.
Keep your home powered during outages with our 100A Generator Transfer Switch
conemaugh
2025-09-03 15:23:23
I'm working on a project right now; one of the things I needed was a generator cutoff box. This isolates your backup generator power source from other components of the electrical system. When I saw this heavy-duty box with a large, positive throw switch, I thought it would work. I ordered it. When it arrived, I looked it over. There were no surprises; it would do what I wanted it to do. It was made of heavy duty steel and the internals were also solid and clearly labeled. There were good instructions, too.I prepared a generator plug and cord, and then I laid out and screwed down the cutoff box and the electical panel it would attach to. Then, I started wiring it. A bit of a struggle was the knockout plugs; sometimes those can be a pain, and these were no different. The plugs can be many sizes, from small to very large. I needed the small plugs removed for romex connectors. I managed, installed the needed romex connectors, and then I inserted the wires. The box is clearly labeled for LOAD and LINE; where LINE is the power source, and LOAD goes toward the appliances. If you aren't sure how to wire this, you can always call an electrician.After the generator wire was ready, I ran the wire to the small utility box and attached the leads to another circuit breaker; this isolates generator power from the household circuit. It's redundant on purpose. You do not want generator power to backfeed your primary power source; you must keep them separate. This is why, in addition to the very positive large switch on this box, I also put a dedicated circuit breaker in the house box. To power the house buss bar from the generator, you have to choose to close two switches. You cannot power the household buss using your backup generator without closing these switches; therefore, you must also act to isolate grid/other power from the box by opening (turning off) the master power circuit breaker. While you can mess this up, you have to try really hard.Then, I tested the circuit with a multimeter. I closed (turned "on") the big, orange lever on the generator control box, then I closed the 220 breaker on the house box. While my generator is 110, I used a 220 breaker on the household box so that the generator would power both legs of the buss. I tested for continuity between the plug and the buss on the household box; see my attached picture. It works. I tested all components of the system, everything worked as it should.This is a sturdy cutoff box. It is very well-made, and the function couldn't be more obvious or positive. Recommended for electricians or knowledgable homeowners.
randen
2025-07-10 18:58:56
While the side walls are on the thin side and there is some flex in the switch plate during operation, for the asking price this switch is a great value.Switch itself is durable enough for daily use if it's installed on an auxiliary structure, and given that it's fully weather proofed, it should do great long term as a external power generator transfer switch.Box has a slide open front panel that's secured by a pair of screws, and that's the only area to pay attention to when it comes to weatherproofing. Box is fully paint coated inside and out, and only screw threads can be possibly exposed to moisture and rusting.As long as those threads are not exposing bare metal, there should be no concern of rusting.Overall it's a great value transfer box that's well coated for rust prevention, and the switch functions as needed, with the only shortcoming of having some flex in the position plate, which is not a big deal.
Garrett H
2025-06-20 19:45:26
Note that I am a Licensed Master Electrician, and have dealt with more of these than most people in the non-electrical industry will ever see. That said, this is a basic 100A MTS (Manual Transfer Switch), and I see no reason that it would not work as designed. The wiring lugs are adequately sized, and all of the necessary components are isolated from each other, and the kit comes with a bonding screw, should your installation dictate you need one (not all do). The biggest thing to know about this assembly is that it carries no UL certification sticker. Does that mean that it will not work? No. Does it mean that you will fail an electrical inspection if you use it? Yes. Unless the inspector doesn't catch it. If your project does not require an inspection, then install at your own risk, but it should work fine.
Thomas H. Lawler
2025-04-21 17:13:39
This switch can be used indoors or outdoors. It'll insure you only have one power source connected to your house (or RV etc) at a time for selecting between things like utility and generators power. While manual switches like this require you to go move it (and find a flashlight to go thru the dark), it can be a lot less cost than automatic ones. The box isn't that big and will be tight for running big wires (if needing the 100 amp size), but can also work for a 40-50 amp selection of circuits if you want. It has knock-outs on the sides and bottom of the box for your 3 cables (2 power sources and one "load" connection). Just be sure as you run the wires that they won't be in the way for the handle to move the way it needs to.
ERROR404
2024-11-20 11:30:17
I replaced a 100amp throw switch with this. It allowed me to put a 50amp generator inlet without having to mess with my breaker panel. I checked after we had a good storm and there was no water intrusion via rain. It has spots to lockout if needed. This really makes using a generator dummy-proof. As you can only have one electrical input selected to the load.
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