Generator safety: the non-negotiable rules

Updated October 2026 · 5-minute read

Portable generators kill more Floridians after hurricanes than the storms themselves — almost always from carbon monoxide. These rules aren’t suggestions; they’re the difference between a working outage plan and a tragedy.

1. Carbon monoxide: the 20-foot rule

• Never run a generator inside your home, garage, carport, or lanai — even with doors open. CO builds to lethal levels in minutes and you cannot smell it.
• Place the generator at least 20 feet from the house, with the exhaust pointed away from windows, doors, and the neighbor’s windows.
• Install battery-backed CO detectors on every floor. Test them before hurricane season, not during it.
• If anyone feels dizzy, nauseous, or headachy near a running generator: shut it off, get everyone into fresh air immediately, and call 911.

2. Never backfeed — use a transfer switch or interlock

Plugging a generator into a wall outlet (“backfeeding”) sends power backward through your panel and out onto the grid, where it can electrocute utility workers repairing lines. It’s illegal in Florida and can destroy your home’s wiring when grid power returns.

• Have a licensed electrician install a manual transfer switch or breaker interlock kit ($1,200–$3,000 installed in Florida).
• The interlock physically prevents your main breaker and the generator breaker from being on at the same time.
• Extension-cord-only setups (cords directly to appliances) are the only safe no-transfer-switch option — and they can’t power hardwired equipment.

3. Refueling rules

• Shut the generator off and let it cool 15 minutes before refueling. Gasoline on a hot exhaust is how fires start.
• Refuel outdoors, away from the house. Keep fuel in approved containers, stored outside living spaces.
• Add fuel stabilizer to stored gasoline and rotate your stock every 6–12 months — stale fuel is the #1 reason generators won’t start after a storm.

4. Florida storm-specific hazards

• Don’t run a generator in standing water or rain without a canopy. Electrocution risk is real; a simple generator tent or open-sided canopy keeps it dry while ventilated.
• Anchor standby units. Florida building code requires wind-rated anchoring — an unanchored unit becomes a projectile in the next storm.
• Wet hands, wet cords, wet ground: keep connections dry, use outdoor-rated cords, and never handle electrical equipment while standing in water.
• Let the generator cool completely before storing it back in a garage or shed — exhaust components stay hot long after shutdown.