By Chris FollinPOWER SKILLS
How to use a generator safely
A portable generator is useful power with two serious hazards: engine exhaust and electricity. Run it outside, far from openings, with exhaust pointed away, dry cords rated for the load, and no backfeeding into a house without proper transfer equipment.
The exhaust is the first problem
Carbon monoxide is invisible, odorless, and fast. A generator outside but too close to a door, window, vent, garage, porch, or neighboring space can still push exhaust where people sleep. Put the generator outside, at least 20 feet from openings when possible, and point exhaust away.
Then deal with electricity. Keep the generator dry, use outdoor-rated cords sized for the load, avoid overloaded power strips, and do not connect it to house wiring unless a proper transfer switch or interlock is installed by someone qualified. Backfeeding can injure utility workers and destroy equipment.
The 20-foot habit
Put the generator outside and well away from doors, windows, vents, tents, campers, garages, and neighboring openings. Point exhaust away. If the site layout makes that impossible, the generator does not run there.
SAFE SETUP FLOW
Place, cord, load, fuel
- 1. Place outsideDry, stable surface, exhaust away, far from openings and sleeping areas.
- 2. Use proper cordsOutdoor-rated, undamaged, sized for the load and distance.
- 3. Manage wattsAdd starting and running loads before plugging everything in.
- 4. Refuel coldShut down, let it cool, then refuel away from ignition sources.
Place it like the wind can betray you
Do not run a generator in a garage, shed, porch, tent, camper, crawlspace, basement, or under an awning that traps exhaust. Open doors do not make enclosed spaces safe. Put it outside and away from doors, windows, vents, and neighboring openings.
Use battery-powered CO alarms inside sleeping areas and nearby buildings. If anyone feels headache, dizziness, nausea, weakness, or confusion, get to fresh air immediately and shut the generator down only if it is safe to do so.
Use electricity like it can bite
Keep the generator dry and off wet ground when possible. Use heavy-duty outdoor-rated extension cords in good condition. Match cord gauge and length to the load. Heat, voltage drop, and damaged insulation are not small details.
Never plug a generator into a wall outlet. That is backfeeding. Use direct cords to appliances or a properly installed transfer switch/interlock system for house circuits.
Fuel and load management
Turn the generator off and let it cool before refueling. Gasoline on a hot engine is a bad plan. Store fuel in approved containers away from living areas and ignition sources.
Add up the starting and running watts of what you plan to power. Motors, fridges, pumps, and compressors can surge above their running wattage. If the generator labors, breaker trips, cords heat up, or voltage-sensitive gear acts weird, reduce the load.
Good signs
- Generator is outside, far from openings, exhaust pointed away.
- CO alarms are working inside.
- Cords are outdoor-rated, uncoiled if needed, and not hot.
Bad signs
- Generator runs in a garage, porch, camper, or under windows.
- Fuel is added while the engine is hot.
- A suicide cord or wall outlet backfeed is involved.
My rule
Generator safety is mostly placement. If the exhaust can find people, the setup is wrong.