How to Connect a Generator to Your Home Safely

Here's what every homeowner should know about connecting a generator safely.

1. Choose the Right Type of Generator

Before anything else, make sure you have the appropriate generator for your needs:

• Portable Generator – Runs on gasoline or propane and is mobile. Great for powering a few circuits or appliances.
• Standby Generator – Permanently installed and hardwired to your home. Can power your entire home automatically during an outage.

2. Never Plug a Generator Directly into a Wall Outlet

This is called "backfeeding" and it's extremely dangerous. Backfeeding can:

• Electrocute utility workers repairing power lines
• Damage your home's electrical system
• Void insurance coverage if an accident occurs

Instead, use one of the safe connection methods below.

3. Use a Transfer Switch

A transfer switch is the safest and most effective way to connect a generator to your home. It safely isolates your generator from the utility lines and allows you to power selected circuits without risk.

Manual Transfer Switch

• Requires you to flip a switch when the generator is running
• Lets you select which circuits to power (e.g., refrigerator, lights, furnace)
• Pros: Lower cost, reliable, simple
• Cons: Must be activated manually

Automatic Transfer Switch (ATS)

• Detects a power outage automatically and starts your standby generator
• Switches your home's circuits to generator power instantly
• Returns to utility power automatically when the grid is restored
• Pros: Hands-free, ideal for whole-home coverage, great for medical equipment or home offices
• Cons: Higher upfront cost, requires professional installation

Why a Transfer Switch Is Important

• Safety – Prevents dangerous backfeeding
• Appliance Protection – Avoids power surges that can damage sensitive electronics
• Code Compliance – Often required by local building codes
• Convenience – Lets you control exactly which circuits get powered

4. Keep Your Generator Outside and Well-Ventilated

Never run a generator inside your home, garage, or basement. Generators produce carbon monoxide, which is deadly.

• Always place the generator at least 20 feet from your home
• Keep it on a dry, stable surface
• Avoid running it in enclosed or partially enclosed areas

5. Use Heavy-Duty, Outdoor-Rated Extension Cords

If you're using a portable generator to power appliances directly:

• Choose cords rated for the wattage of your appliances
• Make sure cords are outdoor-rated and free of cuts or damage
• Plug appliances directly into the generator—never into wall outlets

6. Turn Off Appliances Before Connecting

To prevent surges:

• Turn off major appliances before connecting the generator
• Start the generator first, then turn on appliances one at a time

7. Follow Manufacturer Instructions and Local Codes

Every generator comes with a user manual—read it! Also check local building codes for generator installation requirements. Standby generators almost always require professional installation.

Final Thoughts

Connecting a generator safely protects your family, your appliances, and utility workers. While a portable generator can be useful in emergencies, nothing beats the safety, convenience, and reliability of a professionally installed standby generator with a transfer switch.