As National Electrical Safety Month comes to a close, it serves as a reminder to re-evaluate the human, technical, and organizational measures that protect people from the dangerous effects of electric current, electric arcs, electromagnetic fields, and static electrification. Electrical safety is vital in every industry, not just manufacturing. It is equally important in agriculture, construction, mining, and even in our homes.
There are numerous regulations and consensus standards that address electrical safety, including OSHA 29 CFR 1910 Subparts S and K for General Industry and Construction, NFPA 70E for Electrical Safety in the Workplace, and ANSI/AAMI ES1 for safe limits of electro-medical equipment. In addition, advisory organizations such as the Institute of Electrical and Electronics Engineers (IEEE) develop standards for electrical engineering practices, while Underwriters Laboratories (UL) establishes safety standards for equipment manufacturing.
Despite these standards, the number of workers who die annually from electrical hazards in the United States remains relatively consistent. Electrocutions, arc flash incidents, and other electrical events account for approximately 140 to 150 fatalities each year out of roughly 5,000 workplace deaths. In 2023, 147 electrical fatalities were recorded, matching the 10-year average. Electrical incidents account for approximately 5 to 6 percent of all workplace fatalities. Notably, nearly 70 percent of the victims are not electricians but workers in construction, maintenance, transportation, and other occupations.
The leading causes of electrical fatalities continue to be overhead power line contact (42.8%), unexpected contact with electricity (19.3%), nearby energized equipment contact (12.7%), working on energized parts (4.1%), ground faults (4.0%), damaged wiring or equipment (3.1%), and arc flash incidents (2%). Two occupations experiencing a growing number of electrical fatalities are tree trimmers and heavy equipment operators.
Research indicates that as many as 39 percent of electrical fatalities could have been prevented through the use of safety devices such as voltage detectors, permanently installed electrical safety devices, and other engineering controls. These preventable incidents most often involved unexpected contact with energy, work on energized parts, ground faults, and damaged wiring or equipment. In many cases, voltage detectors or sensors could have alerted workers to nearby hazards. Similarly, the use of readily available ground-fault circuit interrupters (GFCIs), particularly portable units, could have prevented approximately 7 percent of all fatalities.
Most electrical fatalities occurring between 2011 and 2021 involved hazards that were either visible or could have been identified through the use of safety devices. Overhead power line incidents can be prevented by educating workers about the risks and emphasizing the importance of maintaining awareness of their surroundings. Workers should always look up and assess their environment before beginning any task. Unexpected contact with electricity can often be prevented by following a simple principle: test before you touch. Qualified workers should always verify whether equipment or components are energized before beginning work.
The most common causes of electrical fatalities are also among the most preventable. All workers, not just electrical workers, should receive training on recognizing and avoiding electrical hazards. Non-electrical workers should understand normal operating conditions and be able to identify damaged wiring or equipment. Permanently installed safety devices can provide additional protection by alerting workers to the presence of voltage before contact occurs.
Many factors influence the severity of an electrical shock, but one of the most important is current, measured in amperes (A). At approximately one milliampere (mA), there is little to no sensation. However, the effects increase rapidly as current rises. At 16 mA, a person may no longer be able to release their grip from an energized source. At 20 mA, muscle paralysis can occur, including paralysis of the respiratory muscles. At 100 mA, ventricular fibrillation can be induced, potentially leading to death. Complete cessation of cardiac muscle activity can occur at approximately 2 A.
These numbers highlight the danger of electricity in the workplace. A typical circuit breaker trips at 15 to 20 A, roughly 1,000 times the current needed to cause respiratory muscle paralysis. Even when an electrical shock does not result in immediate death, severe burns to the skin and internal organs can be life-threatening.
While electrical hazards are not the leading cause of workplace fatalities, they remain among the most consistently deadly and preventable hazards. On every job site, hazards may exist above you, beside you, or hidden in plain sight. Electricians, roofers, construction workers, tree trimmers, and HVAC technicians all face risks when working near energized equipment and overhead power lines. Electricity does not offer second chances.
Before beginning work, take time to identify what may be energized. Look for overhead power lines and nearby electrical equipment. Verify clearances, use the proper equipment, and never assume a line has been de-energized. A ladder, section of conduit, crane boom, or even a tree limb can become energized if it comes too close to a power source.
Electrical safety is equally important at home. Because electricity is such an integral part of daily life, it is often taken for granted. Yet thousands of people in the United States are seriously injured or killed each year due to electrical fires and accidents in their homes. An average of 51,000 electrical home structure fires occur annually, resulting in nearly 500 deaths, more than 1,400 injuries, and over $1.3 billion in property damage. In addition, the U.S. Consumer Product Safety Commission reports that nearly 400 people are electrocuted each year in the United States.
Many home electrocutions and electrical fires can be prevented through a basic understanding of electrical safety principles and adherence to safe practices. Severe weather can strike at any time, increasing the risk of electrical hazards. One of the most effective ways to protect your family and home is to hire a qualified, licensed electrician to perform electrical work and inspections.
The growth of electric vehicles (EVs) has introduced new electrical safety considerations. EVs have become an important part of global efforts to reduce fuel consumption and carbon emissions, but they also present unique risks. One of the most significant concerns involves lithium-ion battery overcharging, where excessive energy is introduced into the battery. Without early detection and intervention, these faults can lead to thermal runaway and fire. As EV adoption continues to grow, charging safety and early warning systems will remain critical components of electrical safety.
Ultimately, electrical safety comes down to the people who organize, manage, and perform the work. Warning signs and safety posters alone are not enough. In a world increasingly surrounded by technology, the most effective defense against electrical injuries is a conscious awareness of electrical hazards and a commitment to safe work practices. Awareness, preparation, and vigilance remain the strongest tools we have to prevent electrical injuries and save lives.
Take this opportunity to review your worksite and home environments for potential electrical hazards. Reinforce training, verify protective systems are in place and functioning, and ensure that safe work practices are consistently followed. Contact USF SafetyFlorida to schedule a confidential consultation and strengthen your electrical safety program with expert, targeted assistance.