Can I put a transfer switch on the whole house?
Emily Wong
Updated on May 18, 2026
Can I put a transfer switch on the whole house?
Whole-Home Transfer Switches. The Whole-Home transfer switch installs between the utility meter and the main service panel. The main service panel the automatic transfer switch supplies will determine the transfer switch’s rating. A main panel with a 200-amp main breaker requires a 200AMP whole-home transfer switch.
What is a transfer switch for a house?
A transfer switch lets you use your home’s wiring system to power any appliance in your home with your generator quickly and easily. Also, some items like furnaces or well pumps can’t be connected to a generator with an extension cord, so a transfer switch is required to power these items during a utility power outage.
How much does it cost to have a transfer switch installed?
The transfer switch installation cost ranges between $500 and $1,500. That includes the cost of the transfer switch and the labor. It normally takes less than a day to install a transfer switch.
Can you run a generator without a transfer switch?
“It’s not only less safe to run a generator without a transfer switch, but you’ll limit the devices that your generator can power,” says Dave Trezza, who oversees generator testing for Consumer Reports.
Which is better transfer switch or interlock?
Compared to a transfer switch, which is limited to a particular number of circuits, an interlock kit allows you to run power from a generator to any circuit within the electrical panel. While this is good in theory, there’s a risk of overloading the generator if it’s not sized according to the load.
Is a transfer switch worth it?
The biggest benefit of having a transfer switch in a residential setting is that you gain the ability to power things up via your circuit breaker panel instead of having to use extension cords. This includes hardwired devices, such as your dishwasher, hot water heater, air conditioning, and ceiling fans.
Do I need an electrician to install a transfer switch?
You’ll have time to get familiar with the generator, stock up on gasoline, and most important, hire an electrician to install a transfer switch—a small device that allows you to power entire circuits in your house with a portable generator—without the hassle and potential dangers of using extension cords.
Should you turn off main breaker when running generator?
For an extra measure of safety, switch your main fuses or circuit breakers to the “OFF” position. Be sure you understand them before hooking up the generator. Follow the manufacturer’s instructions to properly ground the generator. Generators emit carbon monoxide.
How much does it cost to install an interlock switch?
As a starting guide, for vehicles that have a “normal” key that is inserted into the ignition and turned to start the vehicle (usually made before 2005) the installation costs start at $215.
Are transfer switches legal?
While you might be tempted to skip a transfer switch when installing your generator, the truth is that it is almost a mandatory part of owning and using a backup power source. The only real choice you have is to use a manual switch or an automatic one.
Can you use extension cords with a generator?
Extension cords directly connected to your portable generator are only to be used to power outdoor items outdoors. Also running extension cords into your home from outdoors through windows, doors and vents can damage cords posing a shock or fire hazard.
How much does a whole house generator cost?
Whole house generator costs range from $1,000 to $6,000 on average. Prices can be as high as $10,000, but you don’t need to spend that much to get a good whole home generator. On the other hand, if you have the budget and want the best of the best, you may find that an expensive standby generator suits your needs.