What must be on all equipment that has an arc flash hazard?
100
Only qualified persons shall be permitted to work on electrical conductors or circuit parts that have not been put into an electrically safe work condition.
What does 70E require?
100
Pure water
What is an insulator of electricity?
100
It is destroyed instead of your skin
What normally happens to PPE during an arc flash?
200
The skin reddens intensely and blisters develop burning through the first and second layers of skin.
What is a Second Degree Burn?
200
The available current and how long it lasts
What determines the intensity of an arc flash?
200
70E Table 130.7
Where can you find the correct Personal Protective Equipment that conforms to the standard?
200
An electric shock that kills someone.
What is Electrocution?
200
When live parts over 50 volts are not placed in an electrically safe work condition it is considered energized electrical work and must be done.
What is Written permit?
300
Causes charring of skin and coagulation of blood vessels just below the skin surface. All three layers of skin are affected.
What is a Third Degree Burn?
300
Accounts for the expulsion of molten metal up to 10 Feet away.
What does the pressure of an arc blast caused by the expansion of the metal as it vaporizes?
300
Provide guidelines which will limit injury to the onset of second or third degree burns.
What is the intent of NFPA 70E regarding arc flash?
300
Someone wearing a space suit
What would a qualified worker look like with Level 4 PPE on?
300
A qualified person
Who has demonstrated skills and knowledge related to the construction and operation of electrical equipment and installations ?
400
An arcing fault, where the electric arcs and resulting radiation and shrapnel cause severe skin burns, hearing damage, and eye injuries.
What is an Arc-Flash?
400
The PPE level required and flash protection boundary.
What does an arc flash label usually have on it?
400
HRC 0
What Hazard Risk Category has been eliminated in the 2015 revision of the NFPA 70E?
400
Decreasing resistance
What would increase the amount of current in a circuit?
400
An unqualified person
Who may never perform a lockout/tagout, work on energized equipment, or enter high risk areas?
500
Skin damage will occur based on the intensity of the heat generated.
What is an electrical arc accident?
500
Burns, Respiratory system damage, Hearing damage, Skin penetration from flying debris and Eye and face injuries.
What are some of the Injuries that can result from an arc flash?
500
Employees exposed to shock hazards shall be trained in methods of safe release of victims from contact with exposed energized electrical conductors or circuit parts.
What is Emergency Response Training under Article 110.2(C)(1)?
500
Little-to-no resistance
What makes a short circuit dangerous?
500
Numerous workers are injured and/or killed each year while working on energized equipment. Many of these casualties are a result of arc flash. Working on energized equipment has become commonplace in many industries.