What is Electric Shock?

Understanding Electric Shock

Electric Shock occurs when current enters the body. It then travels through tissue. The body becomes part of a circuit between two points. These points have different electrical potential. Examples include a live conductor and ground. Injury depends on the current path and contact time. It also depends on voltage, skin condition, and health.

Related glossary terms: Ground-Fault Circuit Interrupter, Ground Fault, Electrical Grounding.

Current can stimulate nerves and force muscles to contract. A person may be unable to release a tool or wire. Hand muscles may tighten around it. A shock can also cause electrical burns, breathing failure, or loss of balance. It can cause an abnormal heart rhythm. A minor sensation doesn't prove that no serious injury occurred.

How Electric Shock Works, Is Measured, or Is Used?

Electric shock follows the principles of Ohm's Law. This law relates voltage, current, and resistance. Current equals voltage divided by resistance. Dry skin offers more resistance than wet or damaged skin. Moisture can increase current flow through the body. Contact with grounded metal can complete the circuit. It can make the body part of the current path.

Electricians assess shock risk by examining voltageand available fault current. They also check exposure time and equipment condition. They check the effectiveness.grounding and protective devices. A ground-fault circuit interrupter compares current leaving and returning through a circuit. It opens the circuit when it detects an imbalance. A GFCI can reduce exposure time. It can't make damaged equipment safe. It can't replace proper isolation.

Why Electric Shock Matters?

Electric shock can injure a person when visible damage appears small. Current through the chest may affect the heart or breathing muscles. Involuntary movement can cause a fall from a ladder or roof. A shock can also show hidden problems. These problems include damaged insulation or an open grounding path. They include reversed wiring or moisture inside equipment.

Electrical safety depends on controlling energy before work begins. Workers use lockout/tagout. They verify no voltage with a properly rated tester. They keep people away from exposed conductors. Homeowners shouldn't rely on a switch position or a tripped breaker. A missing noise doesn't prove that an installation is de-energized.

When Electric Shock Matters Most?

The risk rises near sinks, pools, and outdoor outlets. It also rises near wet basements and construction areas. Damaged cords also raise the risk. Risk rises when equipment has a burning odor or visible arcing. Loose connections and repeated breaker trips also raise the risk. Unexplained tingling on metal surfaces is another warning. Older buildings may have missing grounding conductors. They may have wiring that no longer suits the connected load.

If someone is still touching a live source, don't touch them directly. Disconnect power from a safe location if possible. Call emergency services. Wait until the source is isolated before providing assistance. After an incident, the affected circuit and equipment should remain out of service. A qualified person should check the branch circuit and protective devices. They should also check connections and the enclosure. In Fort Wayne, emergency electrical work often makes damaged circuits safe. This work may follow a shock, outage, storm, or water intrusion.