Power Outage Protocols Toolbox Talk

Power outages can happen without warning and can quickly create unsafe conditions on a construction site. Loss of lighting, temporary power, alarms, radios, ventilation, pumps, tools, lifts, gates, and building systems can leave workers exposed to falls, struck-by hazards, electrical risks, poor visibility, and confusion.

This talk focuses on what the crew should do when power is lost, how to shut down work safely, how to communicate, and what must be checked before power is restored and work resumes.

Why This Matters

• Sudden darkness can lead to trips, falls, equipment contact, and workers moving into unsafe areas.
• Tools, pumps, lifts, hoists, fans, and temporary systems may stop working or restart unexpectedly when power returns.
• Loss of ventilation can create dangerous conditions in confined spaces, basements, tunnels, or enclosed areas.
• Emergency lighting, alarms, cameras, access control, and communication systems may be affected.
• A clear power outage plan helps the crew stop work safely, account for workers, and prevent rushed decisions.

Common Hazards

• Workers using stairs, ladders, scaffolds, trenches, or uneven walking surfaces in low light.
• Power tools, saws, grinders, welders, pumps, or equipment left switched on when power is lost.
• Temporary lighting, cords, panels, generators, and GFCIs being damaged, overloaded, or handled incorrectly.
• Loss of ventilation in confined spaces, enclosed rooms, or areas with fumes, dust, or exhaust.
• Traffic routes, gates, hoists, elevators, and access points becoming unsafe or locked out of normal operation.
• Workers assuming power is off and touching energized parts, panels, cords, or equipment without verification.
• A power outage during night work, severe weather, concrete placement, crane activity, dewatering, or lift operations.

Safety Checklist

Before Work Begins

• Review the site power outage plan, emergency lighting locations, evacuation routes, and muster point.
• Confirm who is authorized to check panels, generators, temporary power, and electrical systems.
• Identify critical systems that must stay powered, such as pumps, alarms, ventilation, lighting, communication, and security systems.
• Check that flashlights, radios, backup lighting, first aid supplies, and emergency contact lists are available.
• Make sure workers know what work must stop immediately if power is lost.

During Work

• Stop work when lighting, visibility, ventilation, or equipment control is affected by power loss.
• Turn off and unplug tools or equipment so they do not restart unexpectedly when power returns.
• Stay clear of electrical panels, damaged cords, temporary power setups, generators, and wet energized areas unless authorized.
• Use flashlights or approved temporary lighting instead of walking through dark areas blindly.
• Exit confined spaces, enclosed areas, lifts, hoists, or elevated work areas if power loss affects safety systems.
• Report the outage, location, affected systems, trapped workers, damaged equipment, or unsafe conditions to supervision.
• Do not restart work until power systems, lighting, ventilation, and equipment have been checked and cleared.

Crew Talking Points

• What work areas would become unsafe first if power is lost?
• Where are backup lights, flashlights, radios, and emergency contact lists located?
• Who is authorized to inspect temporary power, generators, panels, and electrical equipment?
• What tools or equipment must be shut off or unplugged during an outage?
• How will we account for workers if lights, radios, phones, or access systems go down?
• Speak up if you know of dark areas, critical equipment, poor backup lighting, or communication gaps that could create problems during an outage.

Stop Work If

• Lighting is lost and workers cannot clearly see walking surfaces, edges, equipment paths, or hazards.
• Ventilation, alarms, pumps, hoists, lifts, or other critical safety systems stop working.
• Electrical panels, cords, tools, generators, or temporary power equipment are damaged, wet, sparking, smoking, or unsafe.
• Workers are trapped in a lift, hoist, enclosed area, confined space, or locked access area.
• Power returns unexpectedly and equipment, tools, or systems may restart without being checked.

Final Reminder

When power goes out, stop and control the hazards before moving. Shut down tools, use safe lighting, report the outage, and do not restart until the site is cleared.