The Occupational Safety and Health Administration (OSHA) offers the following cautions on the use of gas-powered generators and other tools:
Shock and Electrocution
- Never attach a generator directly to the electrical system of structure (home, office, trailer, etc.) unless a qualified electrician has properly installed the generator with a transfer switch.
- Always plug electrical appliances directly into the generator using the manufacturer's supplied cords or extension cords that are grounded (3-pronged). Inspect the cord to make sure they are fully intact and not damaged. Never use frayed or damaged extension cords.
- Keep a generator dry; do not use it in the rain or in wet conditions. If needed, protect a generator with a canopy.
Carbon Monoxide Poisoning
- Never use a generator indoors or in enclosed spaces such as garages, crawl spaces, and basements.
- Make sure a generator has three to four feet of clear space on all sides and above it to ensure adequate ventilation.
- Be cautious when using a generator outdoors to ensure it is not placed near doors, windows, and vents could allow CO to enter and build up in occupied spaces.
- If you or others show symptoms of CO poisoningdizziness, headaches, nausea, tirednessget to fresh air immediately and seek medical attention. Do no re-enter the area until it is determined to be safe by trained and properly equipped personnel.
- Generators become hot while running and remain hot for long periods after they are stopped. Generator fuels (gasoline, kerosene, etc.) can ignite when spilled on hot engine parts.
- Before refueling, shut down the generator and allow it to cool.
- Gasoline and other generator fuels should be stored and transported in approved containers that are properly designed and marked for their contents, and vented.
- Keep fuel containers away from flame producing and heat generating devices (such as the generator itself, water heaters, cigarettes, lighters, and matches). Do not smoke around fuel containers.
Noise and Vibration Hazards
- Generator engines vibrate and create noise.
- Excessive noise and vibration could cause hearing loss and fatigue that may affect job performance.
- Keep portable generators as far away as possible from work areas and gathering spaces.
- Wear hearing protection if this is not possible.