How to connect a generator to your home safely
Connecting a generator to your home is not just about convenience; it’s about safety for you, your equipment, and utility workers.
This guide outlines safer connection options and why backfeeding through improvised methods should be avoided.
Why backfeeding is dangerous
Simply plugging a generator into a dryer outlet or other backfeed setup is extremely dangerous and often illegal. It can energize utility lines you think are dead, putting line workers and neighbors at risk, and can damage your home's wiring and appliances.
Safer ways to connect a generator
- Transfer switch: a dedicated switch installed near your main panel that lets you select which circuits are powered by the generator versus the grid.
- Interlock kit: a mechanical interlock that prevents the main breaker and generator breaker from being on at the same time, allowing safe backfeeding through a properly installed inlet.
- Manual extension cords: for smaller setups, you can safely plug key loads (like fridge, lights, and devices) directly into the generator using heavy-duty outdoor-rated cords.
Working with an electrician
For anything that ties into your home panel, a licensed electrician is strongly recommended. They can:
- Size the generator inlet and wiring correctly.
- Install and label a transfer switch or interlock kit.
- Help you choose which circuits to power during an outage.
Tip: you can use the runtime, fuel cost, and size planners on the GeneratorCalc home page to turn these ideas into rough numbers for your specific generator and situation.