A dangerous condition such that contact or equipment failure can result in electric shock, arc flash burn, thermal burn, or blast. Fire, shock, and electrocution have been considered to be electrical hazards for many years. Since the 1995 edition of NFPA 70E, arc flash has been recognized as an electrical hazard.
What is arc flash hazard?
Simply put, an arc flash is a phenomenon where a flashover of electric current leaves its intended path and travels through the air from one conductor to another, or to ground. … Because of the violent nature of an arc flash exposure when an employee is injured, the injury is serious – even resulting in death.
Which of the following hazards are associated with arc flash?
Arc flash injury can include external burns to the skin, internal burns from inhaling hot gases and vaporised metal, hearing damage, eye damage such as blindness from the ultraviolet light of the flash, as well as many other devastating injuries.
What are the types of electrical hazards?
Eight most dangerous electrical hazards in your home
- Poor Wiring and Defective Electric Wires: …
- Outlets Close to Water. …
- Lightbulbs. …
- Covered Electrical Cords and Wires. …
- Pouring Water on Electrical Fires. …
- Inquisitive Young Children. …
- Wet Hands. …
- Extension Cords.
Is arc flash required by OSHA?
OSHA requires employers to protect employees from electrical hazards, including arc flash. OSHA issues citations based on the requirements of NFPA 70E through existing Agency regulations.
How dangerous is arc flash?
Dangers of arc flashes
An arc flash can cause minor injuries, third degree burns and potential death as well as other injuries including blindness, hearing loss, nerve damage and cardiac arrest. Fatal burns can occur when the victim is several feet from the arc.
Can arc flash kill you?
An arc flash, which is a lightning bolt–like release of heat and energy caused by an electrical fault, can lead to extensive damage to property and risk of injury and death to people.
What is the purpose of an arc flash study?
An arc flash study is an engineered incident energy analysis defined to establish safety protocol for qualified electrical personnel required to work on electrical equipment and circuit parts that cannot be placed in an electrically safe work condition.
Why is arc flash so harmful?
According to the National Institute for Occupational Safety and Health (NIOSH), five to 10 arc flash incidents occur each day in the U.S. Arc flash is extremely dangerous because it can produce some of the highest temperatures known to occur on earth, up to 35,000 degrees Fahrenheit, which is four times the temperature …
At what voltage is arc flash a concern?
Most 400 V and above electrical services have sufficient capacity to cause an arc flash hazard. Medium-voltage equipment (above 600 V) is higher potential and therefore a higher risk for an arc flash hazard.
What are the two main types of electrical hazards?
- Shock: A response to electric current passing through the body.
- Arc Flash/Blast: Emits heat and intense light that causes burns.
- Fire: Occurs with faulty outlets, old wiring, cords, and switches.
- Explosions: When electricity ignites explosive material in the air.
What is the most common type of electrical hazard?
Common types of electrical hazard include:
- Contact with live wires resulting in electric shock and burns,
- Fires due to faulty wiring,
- Exposed electrical parts,
- Ignition of fires or explosions due to electrical contact with potentially flammable or explosive materials,
- Inadequate wiring,
What are the two types of electrical hazards?
The two types of electric hazards are thermal (excessive power) and shock (current through a person).