Safe Use of Portable Generators Toolbox Talk

Portable generators are commonly used on construction sites to provide power when permanent electricity is not available. While they are useful, generators can create serious hazards if they are used incorrectly. Electrical shock, carbon monoxide poisoning, fires, and equipment damage can all occur when generators are placed improperly, overloaded, or connected with damaged cords.

This toolbox talk focuses on safe generator placement, proper electrical connections, and safe operating practices. Crews need to understand that generators produce both electricity and exhaust gases, and both hazards must be controlled to keep the jobsite safe.

Why This Matters

• Generators produce carbon monoxide, a deadly gas that cannot be seen or smelled.
• Improper generator connections can create shock or electrocution hazards.
• Overloaded generators can overheat and cause fires.
• Damaged cords connected to generators increase the risk of electrical shock.
• Improper fuel handling can lead to burns or fires.

Common Hazards

• Operating generators inside buildings, trailers, or enclosed areas.
• Placing generators too close to doors, windows, or air intakes.
• Using damaged extension cords or overloaded circuits.
• Fuel spills during refueling or refueling while the generator is hot.
• Poor ventilation allowing exhaust fumes to build up near workers.
• Generators placed in walkways or equipment paths where they can be struck.
• A generator running overnight near an open window or job trailer.

Safety Checklist

Before Work Begins

• Place generators outdoors in well-ventilated areas away from buildings.
• Position generators far enough away from doors, windows, and air intakes.
• Inspect extension cords and power connections before use.
• Confirm cords are rated for generator output and jobsite conditions.
• Check fuel levels and inspect for leaks before starting the generator.
• Verify ground-fault circuit interrupter (GFCI) protection where required.

During Work

• Keep the generator clear of materials, debris, and walkways.
• Monitor electrical loads to avoid overloading the generator.
• Keep cords protected from water, traffic, and sharp edges.
• Allow generators to cool before refueling.
• Shut down the generator before performing maintenance or adjustments.
• Watch for signs of exhaust exposure such as headaches, dizziness, or nausea.

Crew Talking Points

• Where are the generators located on this jobsite?
• Are generators positioned far enough away from enclosed spaces?
• Have all cords and electrical connections been inspected?
• Who is responsible for fueling and maintaining the generator?
• Are there any signs of exhaust fumes entering nearby work areas?
• Does anyone have concerns about generator placement or operation today?

Stop Work If

• A generator is operating inside or too close to an enclosed area.
• Workers experience symptoms of carbon monoxide exposure.
• Fuel is leaking or spilled around the generator.
• Electrical cords are damaged or overheating.
• The generator is overloaded or shutting down unexpectedly.
• The generator is located where equipment or vehicles could strike it.

Final Reminder

Portable generators are powerful tools, but they must be used safely. Always operate them outdoors, inspect connections, and control both electrical and exhaust hazards.