Portable Generator Safety: Prevent Carbon Monoxide, Fire and Shock
Operate a portable generator outdoors more than 20 feet from doors, windows and vents with exhaust facing away, keep it dry, use working carbon-monoxide alarms and never backfeed a home through a wall outlet.
Timeline
- Before an outage: Read the manual, install battery-backed carbon-monoxide alarms and arrange any home connection through a qualified electrician.
- Before starting: Move the generator outdoors more than 20 feet from openings, point exhaust away and protect it from moisture without enclosing it.
- During operation: Keep it dry, monitor alarms and loads, and shut it down and let it cool before adding fuel.
A portable fuel-burning generator must run outdoors, never inside a home, basement, crawlspace, shed or garage—even with doors or windows open. CDC guidance says to place it more than 20 feet from windows, doors and vents. CPSC also advises pointing the exhaust away from the home and nearby occupied buildings. Carbon monoxide is colorless and odorless, and dangerous concentrations can build quickly without warning. [1][2]
Install working carbon-monoxide alarms with battery power or battery backup on every appropriate level and near sleeping areas, following the alarm maker's placement instructions. An alarm supplements safe generator placement; it does not make an indoor or attached-garage setup acceptable. If an alarm sounds, or anyone feels dizzy, weak, nauseated, confused or ill, get everyone into fresh air immediately and call emergency services from a safe location. [1][2]
Keep the generator dry and do not operate it with wet hands. The U.S. Fire Administration warns that wet operation can cause shock or electrocution. If weather requires cover, use a manufacturer-approved open canopy or other arrangement that keeps rain off while maintaining full outdoor ventilation and exhaust clearance. Never solve the rain problem by moving the running unit into a garage, doorway or enclosed tent. [2][3]
Plug appliances directly into the generator only as the manual allows, using intact heavy-duty outdoor-rated extension cords whose ratings exceed the connected load. Never power house wiring by plugging the generator into a wall receptacle. This practice, called backfeeding, can energize utility lines, electrocute workers or neighbors and bypass household protections. A building connection requires approved transfer equipment installed under current electrical codes by a qualified electrician. [2][3]
Prevent fire while refueling. Turn the generator off and let the engine cool before adding fuel because spilled gasoline can ignite on hot parts. Store gasoline and other fuels outside living areas in approved, properly labeled containers, away from flames, pilot lights and fuel-burning appliances. Follow the manufacturer's fuel, grounding, maintenance and shutdown instructions, and keep children away from the hot engine and exhaust. [2][3][4]
Manage electrical load deliberately. Add the running watts of essential appliances and consider the higher starting demand of motors such as refrigerators, pumps and air conditioners. Do not exceed the generator, cord or connection rating. Turn off and unplug equipment before connecting or disconnecting when the manual directs. Sensitive medical equipment needs a power-outage plan made in advance with the equipment supplier, clinician and local emergency resources. [2][3]
Before an outage, test alarms, review the exact generator manual, check recalls and plan a safe outdoor location that remains more than 20 feet from all building openings. Local fire, electrical and fuel-storage rules can add requirements. If a permanent home connection is wanted, arrange it before the emergency through the utility and a licensed professional; storm conditions are the wrong time to improvise wiring, ventilation or fuel storage. [2][3][4]
Sources
- Centers for Disease Control and Prevention — Carbon Monoxide Poisoning Basics
- U.S. Consumer Product Safety Commission — Portable Generator Safety Alert
- U.S. Fire Administration — Five Steps to Portable Generator Safety
- U.S. Consumer Product Safety Commission — Fuel Container and Gasoline Safety