How to Hook Up Generator to House?

When unexpected power outages occur, having a generator on hand can be a lifesaver. These devices serve as a backup source of electricity and can be invaluable in ensuring that your home and essential appliances remain operational.

Whether you are a frequent user of generators or not, their importance cannot be denied. And, if you have recently acquired a generator but are unsure of the proper way to connect it to your home, it is crucial to seek guidance to avoid any potential mishaps. With the right knowledge, you can ensure that your generator is ready to provide power when you need it most.

How to Hook Up Generator to House

In this guide, you will discover how to connect a generator to your home in a professional and orderly manner. We will walk you through the necessary steps to ensure a clean and safe installation, so you can have peace of mind knowing your generator is properly connected and ready to provide power when needed.

So, without further ado, let’s get started and explore the method of hooking up a generator to your house.

Also Read:How Long Can A Generator Run?

How To Hook Up Generator To House (Step By Step)

1. Find outside what type and the amperage of the plug is

When it comes to connecting a generator to your home, the first step is choosing the correct plug and determining the appropriate amperage.

The power output of a generator is determined by its size or capacity, which ultimately determines the amount of electricity that it can provide. To find the ampacity of the generator, you can use the gauge located next to the plug as an indicator,

it will give you an idea of how much current the generator can handle. And, by selecting the right plug and amperage, you can ensure that your generator can provide power to all of your essential appliances and devices in a safe and efficient manner.

2. Supplies

When it comes to getting your insurance company to approve the installation of a generator, it’s a good idea to purchase a UL-listed device that is compatible with your control box and has been tested and evaluated for performance. Many insurance companies require that the generator meets UL standards and specifications for safety.

Additionally, when selecting the cable for your generator, it is important to ensure that it matches the circuit breaker box, double-pole circuit breaker, amplifier’s input box and cable housing sticker. And, to ensure that the generator runs smoothly and efficiently,

it’s crucial to match the size of the generator to the size of the power plant where it will be installed. By taking these steps, you can ensure that your generator meets the necessary safety requirements and is ready to provide power when you need it most.

3. The conduit hole should be drilled or found

One of the first steps in connecting a generator to your home is ensuring that there is a channel hole in place. If your home does not have one, it will be necessary to drill one. When drilling the hole, it’s important to position it as close to the plate as possible to make the process of connecting the generator easier.

And, for the best results, it’s recommended to use a hammer drill for drilling the hole, as it will make the process more precise, efficient and less labor-intensive. With the right tools and a little bit of care, you can easily create the channel hole that you need to connect your generator to your home.

4. The installation of the input box for power

Before connecting your generator to your home, it’s important to properly prepare the PVC connection. One of the key steps in this process is creating a blind hole in the front cover of the power input housing. This hole will be used to connect the generator to your home’s electrical system.

To ensure that the hole is properly sealed and protected from the elements, you can use both glue and waterproof plugs to secure the connection.

Additionally, it’s important to have the necessary power input boxes on hand, as they are crucial materials that are required to complete the installation. By preparing the PVC connection properly, you can ensure that your generator is connected to your home in a safe and efficient manner.

5. Conduit glued and tested

To ensure that the line connecting your generator to your home is the correct length, use a hacksaw to cut it to the desired measurement. Then, to secure the line in place, apply glue. Before attaching the line, it is important to double-check the measurements to ensure that it is the right size for your needs.

This will help you avoid any errors and ensure that the line is properly secured and able to transfer power from the generator to your home. By taking the time to carefully measure and cut the line, you can ensure that your generator is connected to your home in a safe and efficient manner.

6. Connect the generator input

After the glue has dried, it is time to run the wiring. Carefully remove the wires one by one from the lead body, and then connect them to the connector after removing the cover. Make sure to remove at least three-quarters of the insulation before making the connection. To ensure a secure connection, use a large screwdriver or nut to tighten the clamps.

It is important to ensure a secure connection by tightening the clamps and removing enough insulation from the wires before making the connection.

7. Fit the wiring in

The cables should be run individually through the duct and into the house, ensuring that they fit securely. Once the cables are in place, the duct cover should be replaced. To seal the space between the canal and the house, use a silicone or expansive filler.

It is important to ensure that cables are securely in place and that the space between the canal and the house is sealed with a silicone or expansive filler to prevent any air leakage.

8. Set up the cable switch box

To begin the process of connecting the cables, remove the four screws on the front panel of the switch. Before proceeding, make sure to turn off the main power and ranch switches. Once the screws have been removed, screw the cable adapter into the blind hole. Then, carefully pull all cable connections through the cable adapter.

It is important to turn off the main power and ranch switches before removing the screws on the front panel of the switch and pulling the cable connections through the cable adapter to ensure safety.

9. Arrange the switches in an open area

When connecting the cables, it is important to ensure that most of the switch areas on the right and top of the screen are clear. If you need to move one or two switches down, you can use replacement cables to make space. If space is limited, a short insulated cable can be used as an alternative.

Having enough clear space on the switch areas is important for connecting the cables properly, and if space is limited, using a short insulated cable can be a solution.

10. Installation of switches and cables 

Once you have made the necessary clear space on the switch box, place the switch in the free space on the top right. To make the connections, place the wires connected to the red wire in one connector, the wires connected to the black wire in another connector, the wires connected to the white wire in another, and the wires connected to the ground bars in the last connector.

Properly placing the switch in the free space on the switch box and connecting the wires to their respective connectors is important for the proper function of the switch.

11. The hold switch should be installed

To secure the switch in place, install the hold switch. This will prevent the switch from moving in any direction and ensures that it stays securely in place.

The hold switch is an important component in securing the switch in place, as it prevents it from moving or shifting in any direction.

12. With the interlock, secure the cover of the control panel

Before starting the generator, switch the generator switch to the primary off position and replace the control panel and switches that are in the off position. Double check that the switch is off and the slider is dropped to prevent it from turning on accidentally. If the light does not turn on immediately, a five-second pause is acceptable. With these steps completed, the generator has been configured for use and is ready to start working.

To ensure safety and proper function of the generator, it is important to switch it to the primary off position, replace control panel and switches, and make sure the switch is off and the slider is dropped before starting it.

How to Connect a Generator to a House without a Transfer Switch

If connecting a generator to your home without a transfer switch, here are the steps to follow:

1. Create a place to install the outlet utility box

Use an oscillating tool or drill to create a rectangular hole in the wall of your chosen location for the generator outlet. This hole should be specifically sized to fit the outlet. Note that an oscillating tool is suitable for wood and drywall, while a drill is necessary for concrete or cement walls.

2. Drill a hole to run the generator cable

Use a drill to create a hole larger than the electrical wires outside your house, in order to run the wires through it. This will prevent damage to the wires by installing them inside your outlet kit in this manner.

3. The waterproof box should be installed

Mount a waterproof box on an exterior wall to protect your end plug from potential damage. One option for the box is the Sigma Electric Box. Keep in mind that a smaller safety box may not be sufficient to accommodate the wires, so a larger one may be necessary.

4. The wire should be connected to the outlet

Connect the other end of the wires to an outside outlet in order to link it to the outlet kit. Once the wires have been inserted, the outlet kit can be assembled inside. Afterwards, use sealant to seal both the exterior and interior holes to prevent leaks in your installation.

5. Connect the generator to an outlet to test it.

Attach an extension cord to the generator inlet plug and power on the generator to test the connection. To determine the wattage output of the generator, use a power consumption tester and connect it to the generator. Then, use appliances with an appropriate power rating to test the generator.

How to Wire a Generator Transfer Switch

  • Determine which household appliances the generator can power.
  • Determine the amount of power needed for each individual device in the fuse box that the generator will need to operate.
  • Confirm that the generator’s capacity exceeds the amperage required to avoid generator failure.
  • Ensure that the same number is labeled on each appliance and circuit breaker.
  • Prevent the circuit breaker from receiving power from the main power source.
  • Remove the switches and circuit breakers.
  • Trim the insulating tube to a suitable length so that it can properly cover the wires.
  • Attach the wires to the insulating tube using PVC cement, then use the wiring harness of the transfer switch to connect the circuit breaker to the unit.
  • Locate the position of the mounting screws, then install the transfer switch on the designated wall by securing it with the screws.
  • Pull the wires through the insulating tube, then cut 1.6 cm of insulation off them. Connect the wires to the transfer switch according to the labels that were previously created. Ensure that each wire is labeled correctly according to its function.
  • Additionally, connect the white wire to the neutral terminal in the center of the transfer switch, and the black wire to the utility 2 pole breaker. On the bottom side of the switch, attach the green wire to the grounding bar.
  • Before replacing the cover of the switch, make sure the power supply to the main load center is disconnected.
  • Cut 1.6 inches off the insulation of each wire assigned to the circuit breaker box, for each appliance.
  • Connect the remaining black wires to the other two pole breakers using wire connectors and adhere to the labels. It’s crucial to remove the appliance wires from the 2 pole breakers.
  • Attach the white wire to the neutral bar and the green wire to the ground bar. After turning on the power, replace the cover on the main circuit breakers.


Is it possible to install my own transfer switch?

If you have a background in working with electronic systems and feel comfortable with the task, you possess the technical aptitude to successfully install a generator transfer switch by yourself.

What is the cost of installing a transfer switch for a generator?

Installing a transfer switch eliminates the need for unsightly and potentially hazardous extension cords, allowing you to power your devices with ease. The process of installing a transfer switch typically takes less than 24 hours to complete and the cost ranges between $500 to $1,500.

Are automatic transfer switches compatible with portable generators?

Contrary to popular belief, standby generators cannot function without automatic transfer switches. As a result, manual transfer switches cannot be used with portable generators.


When it comes to power outages, having a reliable home generator can make all the difference. Today, there are numerous options available on the market that come equipped with transfer switches – and the best part? They’re becoming more budget-friendly than ever before. Instead of going through the hassle and expense of wiring your entire home with a generator, simply utilizing high-quality extension cords to connect the necessary equipment is a much simpler and safer solution. It’s important to remember that connecting a generator to your home should always be done by a professional, regardless of whether a transfer switch is used. If this article has provided valuable information on how to connect a generator to your home, please share with others who may be facing similar challenges and leave your comments below.

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