How To Connect Portable Generator To House Transfer Switch

How to Connect a Portable Generator to Your House Transfer Switch

Power outages are often unexpected and can leave you in the dark for extended periods. However, with a portable generator and a transfer switch, you can easily keep the lights on during a power outage. In this article, we’ll take you through the steps required to connect a portable generator to your house transfer switch to keep your home powered during blackouts.

What is a Generator Transfer Switch?

A generator transfer switch is an electrical device that allows you to switch your home’s power source from your utility power to your generator’s power during a power outage. When a power outage occurs, the transfer switch automatically disconnects your home from the grid and connects it to the generator. It protects your generator from back-feeding, ensures that your electrical devices are powered up, and could prevent a fire hazard, thus, making your home safe during an outage.

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What are the Benefits of a Transfer Switch?

There are several benefits to having a transfer switch installed in your home.


The primary benefit of a transfer switch is safety. When you connect a portable generator directly to your home’s electrical system without a transfer switch, the excess electricity could travel back through the utility lines. This could potentially create a feedback loop that could damage your generator, cause injury or even death to line workers who are restoring power in your area. A transfer switch ensures that no back-feeding occurs, which greatly reduces the risk of accidents or damages.


With a transfer switch, you don’t have to worry about manually turning on the generator or carrying extension cords around the house. A transfer switch is designed to make the process of switching from the power grid to the generator automatic and convenient. You just need to make sure that the generator is connected to the transfer switch and is adequately fueled.

Protection of Electrical Devices

With a transfer switch, you can avoid power surges and brownouts that can damage your electrical devices. A transfer switch will ensure that the voltage of the generator is at the right level, and no appliances are damaged.

How to Connect a Portable Generator to Your House Transfer Switch?

Connecting your portable generator to your house transfer switch involves a couple of steps. Here are the steps you need to follow:

Step 1: Select the Right Transfer Switch

Before you begin installing your transfer switch, it is essential to select the right size. The size of a transfer switch is determined by the wattage of the generator and the minimum and maximum amperage capacity of your home’s main service panel. You can consult with an electrician to help select the right size for your home.

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Step 2: Install the Transfer Switch

Once you have selected the right transfer switch, the next step is to install it. The transfer switch should be installed by a licensed electrician to ensure that it is installed correctly and follows the recommended electrical code requirements.

Step 3: Connect the Generator to the Transfer Switch

After installing the transfer switch, follow the manufacturer’s instructions to connect your generator to the transfer switch. This usually involves connecting the power cords, grounded wiring, and installing an inlet box, which is mounted on your home’s exterior. The inlet box allows your generator’s power to be fed into the transfer switch.

Step 4: Test the System

After connecting the generator to the transfer switch, it is time to test the system. The electrician will perform a series of tests to ensure that everything is working correctly. The tests include starting up your generator, turning off the main breaker, and watching the transfer switch move its activation switch to the generator.


Can I install a transfer switch myself?

It is recommended that installation of a transfer switch be left to a licensed electrician. This is for safety and precision reasons.

Do I need a permit for installing a transfer switch?

Yes, you need a permit for installing a transfer switch. This is to ensure that your connection conforms to the recommended electrical building codes and safey standards.

Can I connect my generator to the transfer switch when the power is turned on?

No, it is not safe to connect your generator to a transfer switch when the power is turned on. It may result in a feedback loop and damage your generator. It is recommended that you only connect your generator to the transfer switch when the main power supply is off.

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What is the proper distance required to keep my generator from the house?

It is important to keep your generator at a safe distance away from your home to reduce the risk of carbon monoxide poisoning. A minimum distance of 10 feet away from the house is recommended.

Can I use an extension cord to connect the generator to the transfer switch?

No, it is not safe or advisable to connect your generator to your house transfer switch using an extension cord. This can create an electrical hazard that can cause damage to your generator and appliances, and pose a threat to the people working to restore power in your area.


Having a transfer switch is vital in ensuring that your generator can safely power your home during power outages. Make sure that you choose the right transfer switch size, have it installed by a licensed electrician, and follow manufacturer instructions when connecting your generator to the transfer switch. By doing this, you will ensure that you keep your home and your family safe and have power when you need it most.

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