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Temporary Power Safety

Temporary power setups appear at harvest, at events, for building projects and after storms. They are only safe if they are planned, protected and removed when the job ends.

What counts as temporary power?

Temporary power includes any short-term electrical supply: lights for a late harvest, power for a farm event, tools on a building site, heat for a calving pen or a generator after an outage. The setup may use cords, portable panels or generators.

Because it is temporary, people often skip the care they would give permanent wiring. That is when mistakes happen.

Include seasonal setups such as heat lamps and brooders, since they run for long periods in busy areas.

Why is it risky?

Setups are often put together quickly, run across wet ground, exposed to weather and handled by people unfamiliar with them. Cords get stepped on, connections get wet and loads get added without checking capacity.

Visitors, children and animals may be nearby, and they may not know what to avoid.

Remember that rain, mud and dew can arrive suddenly, so plan for wet conditions even on dry days.

How do you plan it?

Decide what you need to power, for how long and where. Ask a licensed electrician for advice on the best approach, particularly if power will serve many people or last more than a short period. Rules vary by location, and events may have extra requirements set by organizers or the local authority.

List the equipment and check its electrical needs in the manuals before anything is plugged in.

Write a short plan that names who sets up, who checks and who shuts down. Share it with everyone who will be on site.

What protection should be in place?

Ground-fault protection is widely recommended for temporary power outdoors and in damp places. Ask an electrician about suitable devices and how to test them. Use cords and equipment rated for the location, and keep connections out of puddles.

Cover or route cords so they are not a trip or crush hazard, and keep people away from connections.

Test protective devices before each use and again when conditions change, following the maker's instructions.

How do you keep people safe around it?

Mark the area and keep children and visitors away from equipment, panels and generators. Assign someone to be responsible for the setup and to check it during use. Make sure the person knows where to shut off power.

Brief workers or volunteers on what to avoid. Post the address and emergency number at the site.

If a child or visitor is hurt, call 911. Keep a first aid kit and a person trained in first aid on site for events.

What should you do before and after?

Inspect everything before you energize it. Check cords, plugs and tools. During use, look for heat, odors, sparking or tripped devices and stop if you see any.

When the job is done, unplug and put everything away. Do not leave temporary cords or lights in place for weeks. Anything that stays longer should be turned into proper wiring by an electrician.

Keep a simple checklist for set-up and take-down, and sign it off so nothing gets left behind.

Who should you ask?

A licensed electrician, your electric utility and your local code office can explain what is allowed. If you are hosting a public event, ask the event organizer, your insurance carrier and the local authority about additional requirements.

If a setup begins to look complicated, that is the time to hire a professional rather than add another cord.

• Many temporary setups depend on a generator.
• Follow the generator safety guidance on this site and the manual, and keep the unit outdoors, dry and away from openings into buildings.
• Use a licensed electrician if the generator will feed a building.
• Plan fuel storage and refueling away from crowds and ignition sources.
• Ask the fire department about extinguishers, particularly for public events.
• Never power a building by plugging a generator into a wall outlet
• Keep a fire extinguisher near any temporary setup
• Do not use damaged tools or cords just to finish a job
• Keep connections off the ground and out of puddles
• Check weather forecasts from the National Weather Service before outdoor setups
• Ask your electrician to inspect anything that will run for more than a short time
• Tell everyone on site who is in charge of the setup and where the shutoff is

Last reviewed: November 12, 2026. Written by the Farm Safety Editorial Team. See our editorial policy.