How to Connect Generator to House without Transfer Switch? Tech Tips

Nowadays people are also searching How to Connect Generator to House without Transfer Switch? In order to use a generator safely and effectively, you’ll need to connect it to your house. Unfortunately, this will not be as simple as plugging the generator into an outlet—you need to have the right wiring and other equipment in place in order to provide electricity from the generator back into your home’s electrical system.

If you attempt to do this without proper knowledge and preparation, you could injure yourself or damage your property (or both). For tips on how to connect your generator to your house without needing a transfer switch, keep reading.

Is a Transfer Switch for a Generator Required?

A transfer switch is an important part of your generator installation because it allows you to safely power critical loads during outages, but they aren’t required in all states. In some places (like California), they are considered optional. To find out if you need one and what type you need, check with your local utility company or search online.

If you do have an outage and don’t have a transfer switch installed on your generator, look for portable generators that come with remote start capabilities. That way, you can turn them on without leaving your home if there is an emergency.

Tools You Need

You need at least two tools to install your transfer switch correctly. A multimeter will allow you to test for power once you’ve installed your generator and breaker. It can be purchased for about $20 at any home center or hardware store. Also, make sure you have an electrical tester on hand, which costs about $5. Both of these tools are available at most home centers and hardware stores.

  • Double outlet receptacle kit for a clean electrical connection
  • Three prong round plug and wire for connecting the power inlet box to the portable generator
  • Power consumption watt tester for reading the wattage produced by your portable generator
  • Extension cord for connecting the power inlet inside to the generator
  • Hand drill for making a hole in the wall
  • Oscillating tools to cut out drywall
  • Philip screw for fixing the receptacle
  • Safety gear for additional safety since you are working with power tools
  • Metal waterproof box for keeping line safe from any possible damage
  • Sealant for making a solid waterproof installation
  • Generator set for backup electricity

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

Step:1 Create a Place for the Outlet Utility Box

Before you can connect your generator, you’ll need to create a place for it. The easiest way is to go out and buy an electrical box and have it installed outside; you can install an outlet inside that box to plug your generator into. But if your house isn’t built with one, or if you have limited access from an attic, another option is adding a subpanel with one socket inside of it.

Step: 2 Drill a Hole for Running Your Generator Cables to the Outlet Box

This is where you’ll make your final connection to your home’s electrical system. Before you do anything, however, check with your local building inspector. Different cities and counties may have regulations on where you can place your generator and how it needs to be connected (for example, in some places they require that all generators need a switch). For maximum safety, hire an electrician or licensed contractor who is trained in generator installation.

Step:3 Insulate all the Waterproof Box Outside Your Wall

Make sure that all of your wires are properly covered with foam and then drywall. If you don’t have access to drywall, consider using fiberglass or another material. Be sure to cover all of your holes before insulating so no water can get inside. This is an important step because it will keep any moisture from getting in and corroding your wiring.

Step:4 Set up The Outlet Unity Box

A unity box, or transfer switch, gives you an added layer of protection when powering on your generator. It’s basically an automatic on/off switch that will allow you to connect your generator directly to your home’s electrical system.

Step:5 Plugin Extension Cord

In order to make sure your generator is getting power, you’ll need to plug in an extension cord that runs from your generator straight into your house. First, flip on your generator and wait for it comes up to speed.

What kind of generator do you have?

If you have a portable generator, you can simply plug it into your home’s main breaker box. But if you have an automatic standby generator, connect it to your home’s electrical system as follows: First shut off your utility power at your main circuit breaker and disconnect any outdoor appliances that may be plugging. Then dig up two of your home’s exterior wires (the neutral and ground wires), and lay them alongside each other near their original junction boxes.


In some cases, you may not have access to a transfer switch or an outside power source. If that’s your situation, don’t lose hope! You can still get your generator hooked up for emergency use. As long as you have a receptacle or circuit breaker in close proximity to where you want to use your generator, it is possible to make connections with extension cords and plugs. How? It all comes down to which plug-in type of outlet you are using: 120V or 240V.

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