THE CONSTRUCTION INDUSTRY IS HIGH-RISK FOR ELECTRICAL HAZARDS

Construction consistently records the highest number of electrical fatalities each year. Risks arise from temporary wiring, heavy machinery operating near overhead lines, and the use of power tools in damp or unstable conditions. Occupations such as general construction laborers, roofers, painters, and carpenters are particularly vulnerable.

Contact with overhead or underground power lines remains the most significant electrical danger for ready-mix concrete truck drivers and pump operators.

• Assume all lines are live: Treat any power line as energized and hazardous.
• Maintain safe distances: Keep vehicles, tools, pumps, and personnel at least 10 feet from overhead power lines. For concrete pumping operations, the NRMCA and ACPA recommend a minimum clearance of 20 feet from energized lines.
• Survey the jobsite: Walk the site before entering or setting up. Identify, mark, and communicate the location of power lines and other hazards.
•  Use a spotter: When backing or maneuvering equipment, use a designated spotter to guide movement around power lines and obstructions.
•   If contact occurs:
−  Remain inside the cab and warn others to stay back.
−  Call 911 immediately.

−  Do not touch the equipment or person in contact with the line.
−  If evacuation is absolutely necessary (e.g., due to fire), jump clear with both feet together and hop or shuffle away to avoid electrical step potential.
•   Verify power shutoff: If minimum clearances cannot be maintained, power must be temporarily de-energized. A qualified representative from the electrical utility must confirm de-energization on site.

When it comes to electrical hazards, even small amounts of electricity can be deadly. To put it into perspective, the current required to light a standard 60 watt bulb is five times more than what is needed to kill a person. That’s why every piece of electrical equipment on a construction site—no matter how common or harmless it may seem—must be treated with respect.

Electrical hazards are especially dangerous because electrocution isn’t the only risk. Electric shock can cause loss of consciousness, which may lead to falls from heights, drops into machinery, or other serious secondary injuries. Understanding how shocks occur and how to prevent them is essential for keeping everyone on the job safe.

WHY EXTENSION CORDS DESERVE EXTRA ATTENTION

Extension cords are used daily on nearly every jobsite, and because they’re dragged, dropped, bent, and run over, they take a lot of abuse. According to the U.S. Consumer Product Safety Commission (CPSC):
• About 4,000 injuries related to extension cords are treated in emergency rooms each
year.
• Nearly half of these injuries occur when people trip over cords.
• Extension cords are responsible for approximately 3,300 residential fires annually, resulting in 50 deaths and 270 injuries.

Most of these fires are linked to short circuits, overloading, damage, or misuse—all avoidable with proper inspection and care.

INSPECTION CHECKLIST: WHAT TO LOOK FOR

Before using any electrical cord or device, ensure the following:

• Extension cords have three wires, including a ground.
• The ground pin is intact on all male plugs.
• Insulation is complete with no cracks or breaks.
• Plugs and receptacles are securely attached to the cord.
• All internal wires are continuous and undamaged.
• Cords are protected from crushing in doors, windows, or pinch points.
• No metal electrical boxes with knockouts are used on cords.
• Plugs are dead-front (molded or securely fastened).
• Cords are not stapled, nailed, or hung in a way that can cause damage.
• Bushings are used when cords pass through holes in covers or boxes.

BEST PRACTICES TO PREVENT ELECTRICAL HAZARDS
To reduce your risk—and the risk to your team—follow these safe work practices:
•  Inspect tools and cords before every use.
•  Never use a tool with the ground prong removed.
•  Avoid operating power tools while standing in water.
•  Keep extension cords out of water entirely.
•  Treat all power lines as energized; avoid contact.
•  Disconnect tools and cords when not in use.
•  Ensure temporary lighting has protective bulb covers.
•  Clearly label all power supplies, circuit boxes, and breaker panels.
•  Use Ground Fault Interrupters (GFIs) on all jobsites.

Electrical hazards are preventable—but only when everyone takes them seriously. Regular inspections, proper equipment use, and awareness of the risks can dramatically reduce injuries and ensure a safer jobsite for all.

At Cemstone, electrical safety is a core part of our Demand Safety culture. By following these guidelines and leveraging industry resources from NRMCA, ACPA, and OSHA, we reinforce our commitment to protecting employees, customers, and partners. Through proactive training, responsible jobsite practices, and continuous improvement, Cemstone works to reduce electrical risks and ensure every team member returns home safely at the end of the day.