How to Connect Generator to House Without Transfer Switch?

How to Connect Generator to House Without Transfer Switch

A transfer switch is a crucial tool when connecting your generator to your house. It’s the only way to make sure the power goes where it needs to go, and not back out onto the grid. But what if you don’t have a transfer switch? What then? Well, that’s why we’re here! We’ll walk through how to connect your generator to your house without the need for a transfer switch.

Is a Transfer Switch for a Generator Required?

The first popular question is, “Do I need a transfer switch for my generator?”. The answer is generally no as the default installation of your standby generator does not require one.

In order to power up appliances and devices in your home from a portable or stationary propane-powered generator, you can do so by powering it directly through an extension cord that runs from the machine outside into a designated outdoor receptacle on your house. This type of setup does nothing more than provide electricity to your appliance via direct connection – without anything between them, there are no safety measures implemented whatsoever which makes concerns about electrical shock valid ones indeed! In this case, if something goes wrong with the unit itself (i.e., breakage), then its proximity to water results in even more risks.

Is a Transfer Switch for a Generator Required

The general rule here is that the generator should not be installed within twenty feet of anything that may create a hazardous situation such as water or fuel tanks and it’s crucial to provide adequate ventilation if run inside your garage for any period of time. It also needs to have enough clearance from any buildings, trees, or other obstacles in case you need to move it during an emergency (or regular maintenance).

Having said all this, we still think there are certain circumstances where having a transfer switch make sense:

  • If you’re considering a whole-house solution such as the WEN 56200i that delivers portable power to your entire household then yes, it does need one for safety measures.
  • A generator located within close proximity of your main electrical panel also requires an automatic transfer switch to avoid being directly connected to house wiring which can be harmful and cause serious damage if not properly grounded against surge currents.

5 Methods of How to Connect Generator to House Without Switch

There are 5 popular methods how to wire generator directly to your house without a transfer switch:

  • Wiring through Breaker Box
  • Wiring Directly to the Main Electrical Panel
  • Wiring Through a Transfer Switch
  • Wiring Through Relay
  • Connecting to the House Through a Power Inverter

Wiring through Breaker Box

You can wire your generator to the breaker box without any assistance. This way you’ll be able to control power generation with a remote switch or by simply flipping one of the main circuit breakers in your house’s electrical panel.

Wiring Directly To Main Panel

Another method is to directly connect the generator wires through an open slot on your home’s main fuse/breaker box, which would make it possible for you to transfer between utility and generator power using only one single wall switch (a standard light switch) placed anywhere inside of your house.

Wiring Through Transfer Switch

In case if there aren’t enough empty slots available on your electric panel, don’t despair! In this situation, all that needs to be done is to install a transfer switch that will give you full control of your generator.

Wiring Through Relay

Instead of using a complicated transfer switch, an easier way is to wire the generator directly through a specialized relay connected to the existing wall switch in the electrical box.

Connecting Generator and House with Power Inverter

Another option how to connect the house with a generator without a transfer panel is by connecting both devices via a power inverter plugged into a standard AC outlet on the exterior of your home’s main breaker box (or any other convenient spot). You’ll need either extended run or portable type depending on the long/short expected outage period.

Choose one of the methods to continue about how to connect the generator house without a transfer switch.

Things You Will Need

First, you need to know the basic information. You will need to know the general location where you want to place your generator, whether it is indoors or outdoors and how far away from an electrical outlet that you want to be located. Next, you are going to have some tools necessary for completing the job correctly including a tape measure because certain measurements are needed in order for everything else to come together properly later on.

You will also need power cords of different lengths depending upon what type of connection needs electricity flowing through them between your home’s main panel box all the way up until they meet with the plug-in connections coming out of your generator itself. The next thing that can make this process flow faster is having multiple types of connectors available—including both plugs as well as extension cords. Additionally, you will need to be aware of the different types of outlets that are available for this type of job.

Finally, it is always a good idea to have an alternative plan in place should something go wrong during your installation process—including having someone close by who can help if things become too complicated or even calling on professional assistance could also ease some stress off of your shoulders as well.

Step-by-Step Guide on How to Use a Generator Without Needing Any Transfer Switch

Now let’s go into more depth and learn how to use your generator without the need for a transfer switch. The following instructions are generic and can be used for all generators with 120-volt outlets.

Create a Place for the Outlet Utility Box

First, you need to create a place for the outlet utility box. It must be located within 50 feet of your house or as close as you can get it, but still on the opposite side from where your generator is going to be placed.

Make sure that there are no overhead obstructions between those two points and do not forget about underground utilities such as cable lines running underneath so they don’t interfere with operations. Make a ground rod by driving a metal-clad wooden stake into the soil at least 12 inches deep using a rubber mallet or sledgehammer and attach an electrical ground wire coming out of the generator plug end of the extension cord to this stake via set screw connectors (green in color). Also, make sure that both ends of extension cords are plugged in securely.

Drill a Hole for Running Your Generator Cables to the Outlet Box

Drill a hole through the wall for running your generator cables to the outlet box. Make sure that this is an exterior wall and not an interior one. If it’s on the side of the house next to where you’re going to place your generator, make sure there are no obstructions between them such as another building or fence. Also, make sure by using a stud finder that there isn’t any obstruction inside the house in front of where you want a plug-in point (such as a metal beam) before drilling. Drill only big enough so cable wires can fit through without too much trouble; otherwise end up having to go back and enlarge the opening if needed after the installation has been completed.

Insulate all the Waterproof Box Outside Your Wall

After cutting the hole, put a small piece of fiberglass insulation over it so you can have a tight seal when plugging in your generator cables. It must be well sealed to keep out water and insects from getting inside the house as this is where power outlets are going to be located. Drill a few holes for cable wire pass-through, place rubber grommets into those holes before pushing through with wires attached. You might also want to attach an insect screen just above ground level around the opening if there’s any chance that bugs will try entering here as well.

Set up The Outlet Unity Box

Now you need to set up the outlet utility box and place it as close as possible to your house’s main electrical service panel (the breaker switch). Drill a hole through both sides of the existing wall using a drill bit just large enough for connecting wires, but not so big that they have room to move around too much especially if any sort of vibration is present such as heavy machinery or a generator running nearby which may also be connected directly into this same circuit.

You can use an old center punch because electricians’ tape will work great at holding everything together once dry. Make sure all connections are very tight with no exposed copper wiring being seen from the outside structure before going inside the home and making the final connection between the extension cord coming out of the generator and your home wiring.

Plug in Extension Cord

Now you are ready to plug in your extension cord into a 120-volt outlet inside the house, turn on both main breaker switches at the panel box and transfer the switch of the generator if available, or just flip the power strip’s circuit breaker that is being used for appliances needing electricity back on once it has been shut off earlier during the testing process due to safety reasons.

Then start up your portable generators’ engine making sure all vents are clear of obstructions since gas fumes can be deadly under normal circumstances without getting sucked down by intake fan blowing air through the entire unit with noise increasing dramatically when doing so along with bright green light (called overload indicator) glowing simultaneously staying lit until put out automatically after running long enough for excess carbon monoxide to be burnt off without causing any harm.

Safety Aspect

Now you need to make sure that the power cord is not being touched by anyone either with bare hands or boots on the ground as this can cause electrical shock and injury. Even though the generator itself has been shut down for now once all appliances are fully functional again with no smoke coming out from vents. It is a true sign of success in normal operation after going through a testing process which should only take around 20 minutes at most before turning it back off then disconnecting the extension cord from the home’s main breaker box first followed by the one connected into the outlet utility box.

Second, taking both ends completely apart with wire nuts available at hardware stores if needed along with removing them carefully while holding wires between fingers like pliers but never directly touching copper wiring together with rubber gloves on hands if any power is still present.

Now you need to make sure that all appliances are turned back off and disconnect both ends of the extension cord from the generator’s outlet box first then the home’s main breaker panel second. Take the time now for safety reasons especially around gasoline fumes being released into the environment which can be harmful or fatal with prolonged exposure without proper ventilation.

Finally, store everything away neatly inside a garage where it belongs along with your new portable generator which will have many more uses in the future whenever electricity becomes unavailable due to storms or other natural disasters arising over time unexpectedly after unexpected events. They happen at every corner throughout our lives, each passing day as never seen before during human history making us vulnerable unless we prepare well ahead of time by doing so beforehand when possible.


Is it illegal to run a generator without a transfer switch?

It is illegal to connect a generator directly to the electrical panel without first installing an approved transfer switch. The National Electrical Code requires that generators be connected through a transfer switch so you will not violate any local building codes by doing this. Some homeowners have illegally rigged up their own power supply during emergencies or when making repairs, but it’s important to understand that this is illegal and unsafe.

How do I temporarily connect my generator to my house?

If you are looking to connect your generator directly to the house, then this is not a safe way of doing so. You will need to purchase an approved transfer switch that is specifically designed for connecting generators up to 200 amps or 125/250 volts. If you have only a 100 amp service panel in your home, then it’s important that you do not attempt to connect a generator that’s larger than 100 amps.

How do you wire a generator directly to a breaker box?

This method is not safe since you will be connecting your generator to the electrical panel. This can pose a safety hazard for anyone who works on the system in the future, and it could result in serious injury or even death if something goes wrong with either house wiring or power supply from the generator.

How much does it cost to install a transfer switch for a portable generator?

It will cost around $100-$150 to install a transfer switch for your generator. This is much cheaper than hiring an electrician to come into the house and do it, but you should always consider that this installation could be extremely dangerous if done improperly and result in serious injury or death.

Useful Video: Your Easy & Safe Way To Hook Generator To House | Generator Interlock Switch Install

Final Thoughts

So for a homeowner, if you have any intention of buying a generator to keep your appliances running during power outages then it’s important that you take this into consideration. And while many generators can be hooked directly up to the house wiring without the need for installation from an electrician or contractor, it is essential that one makes sure they get a professional to do it for them.

We hope this has been of great help to you and that it will aid you in making the decision on whether or not a transfer switch is something that your generator needs.