Electrocution means death caused by electricity. Electric shock is the broader term for any instance where electrical current passes through the body, whether the person survives or not. That single distinction, fatal versus non-fatal, is the entire difference. Every electrocution involves an electric shock, but the vast majority of electric shocks are not electrocutions.
This distinction matters more than it might seem. The words are used interchangeably in casual conversation, but in medical, legal, and workplace safety contexts, they mean very different things. OSHA classifies electrocution specifically as “death due to electrical shock,” listing it as a separate category from non-fatal electrical shock, burns, and falls.
Why the Word “Electrocution” Means Death
The word itself was invented to describe death. In 1889, as New York prepared to carry out the first execution by electric chair, people realized there was no word for this new method of killing. Thomas Edison and his lawyers exchanged letters proposing names like “electricide,” and someone even suggested calling it “to Westinghouse” (after Edison’s rival). The word “electrocute” first appeared in print in August 1889, and the first electric chair execution took place the following year. The word is literally a blend of “electric” and “execute.”
Over time, everyday usage has blurred this meaning. People commonly say “I got electrocuted” after a minor shock from a doorknob or appliance. Linguists might accept that drift, but technical fields have not. In medicine, occupational safety, and law, electrocution still means the person died.
What Happens Inside the Body
The severity of an electrical injury depends on the amount of current flowing through the body, measured in milliamps (mA). The progression from harmless to fatal is surprisingly narrow.
- 1 mA: Barely perceptible, a faint tingle.
- 16 mA: The “let-go” threshold. At this level, your muscles contract so forcefully that you cannot release your grip on the source of current. This involuntary clenching prolongs exposure and dramatically increases danger.
- 20 mA: Respiratory muscles become paralyzed. You cannot breathe.
- 100 mA: The heart’s electrical rhythm destabilizes into a chaotic quiver called ventricular fibrillation. Blood stops circulating effectively.
- 2,000 mA (2 amps): The heart stops entirely, and internal organs sustain direct damage.
For context, a standard household circuit can deliver far more than 100 mA. What typically limits the current is your body’s resistance, which varies enormously depending on whether your skin is wet or dry, how large the contact area is, and the path electricity takes through your body. Wet skin can drop resistance low enough that a 120-volt household outlet becomes genuinely life-threatening.
How Electrical Deaths Occur
Exposure to electricity can cause immediate death through three main mechanisms: the heart stopping, the heart falling into a chaotic rhythm that prevents it from pumping, or paralysis of the muscles that control breathing. The voltage and the path the current travels through the body determine which of these occurs. Current that passes from one hand to the other crosses directly through the chest, putting the heart in the most danger. Current that flows from a hand to a foot may still reach the heart but follows a less direct route.
When people survive the initial shock but are hospitalized with severe electrical burns or organ damage, the most common causes of death in the hospital are infection, blood poisoning, and failure of multiple organ systems simultaneously. In workplace settings, at least half of all electrocutions involve contact with power lines, where voltages are high enough to cause massive burns alongside cardiac arrest.
Non-Fatal Shocks Are Far More Common
At least 30,000 non-fatal electrical shock incidents occur each year in the United States. Most involve brief contact with household current and resolve without lasting harm. But the gap between a minor shock and a catastrophic one can be disturbingly small, and even shocks that seem minor in the moment can cause problems that surface later.
The “no-let-go” phenomenon is particularly dangerous and psychologically scarring. When current exceeds about 16 mA, the muscles in your hand and arm contract involuntarily, locking your grip around whatever is delivering the shock. You are physically unable to pull away, which extends exposure time from a fraction of a second to potentially minutes. People who experience this are significantly more likely to develop depression and post-traumatic stress disorder afterward, even if their physical injuries appear modest.
Long-Term Effects of Surviving a Shock
Survivors of significant electrical injuries often develop chronic symptoms that can be surprisingly difficult to diagnose and treat. Research published in Canadian Family Physician found that as many as 78% of electrical injury survivors eventually receive a psychiatric diagnosis, including depression, PTSD, anxiety, and panic attacks. These aren’t simply reactions to a frightening event. Electrical current can cause structural damage in the brain, including hemorrhage and swelling, that contributes directly to mood and cognitive changes.
Neurological problems are among the most common lasting effects. Permanent nerve damage at the point where current entered the body is extremely common. Survivors frequently report numbness, tingling, muscle spasms, tremors, poor coordination, memory loss, and difficulty with attention and verbal learning. Many describe chronic pain that seems out of proportion to any visible injury, a pattern that can be frustrating for both patients and their doctors.
Physical symptoms extend beyond the nervous system. Up to 6% of electrical injury survivors develop cataracts within the first year, with additional cases appearing over the next two to three years. Fatigue, joint stiffness, reduced range of motion, headaches, and tinnitus are all documented long-term effects. Some survivors report night sweats, fever, and chills that persist well beyond the initial recovery period.
Voltage Thresholds and Risk Levels
In the United States, the National Electrical Code defines low voltage as anything up to 600 volts, which includes standard household wiring (120 and 240 volts). Medium voltage covers 600 volts up to 100,000 volts, and high voltage means anything above 100,000 volts. Other countries draw the lines differently. In Europe, high voltage starts above 52,000 volts, while Canada’s threshold sits at 46,000 volts.
These categories matter because the nature of the injury changes with voltage. Low-voltage injuries from household sources are more likely to cause cardiac rhythm problems because the current often flows at a level that disrupts the heart’s electrical signals without immediately stopping it. High-voltage injuries, like those from power lines, tend to cause devastating burns along the current’s path through the body, destroying muscle, nerve, and bone tissue in addition to any cardiac effects. Both can kill, but they do so in different ways and leave different patterns of damage in survivors.