NFPA 70E Exam | Newest Questions and
Answers | 2026 Update | Expert Verified
• Arc Flash Hazard -✓✓ A dangerous condition associated with the possible release of
energy caused by an electric arc
• Arc Rating -✓✓ The value attributed to materials that describes their performance to
exposure to an electrical arc discharge. The arc rating is expressed in cal/cm^2 and is
derived from the determined value of the arc thermal performance value (ATPV) or
energy of breakopen threshold (E BT) (should a material system exhibit a breakopen
resoponce below the APTV value). Arc rating is reported as either APTV or E bt,
whichever is the lower value.
• Barricade -✓✓ A physical obstruction such as tapes, cones, or A-frame-type wood or
metal structures intended to provide a warning and to limit access.
• Barrier -✓✓ A physical obstruction that is intended to prevent contact with equipment
or energized electrical conductors and circuit parts or to prevent unauthorized access to
a work area.
• Shock boundaries -✓✓ Limited approach boundary,
Restricted approach boundary,
Prohibited approach boundary (not in 2015)
• Limited approach boundary -✓✓ An approach limit at a distance from an exposed
energized electrical conductor or circtuit part within which a shock hazard exists.
• Restricted approach boundary -✓✓ An approach limit at a distance from an exposed
energized electrical conductor or circuit part within which there is an increased
likelihood of electric shock, due to electrical arc-over combined with inadvertent
movement, for personnel working in close proximity to the energized electrical
conductor or circuit part.
• Arc Flash Boundary -✓✓ When an arc flash hazard exists, an approach limit at a
distance from a prospective arc source within which a person could receive a second
degree burn if an electrical arc flash were to occur.
• Electrically safe work condition -✓✓ A state in which an electrical conductor or circuit
part has been disconnected from energized parts, locked/tagged in accordance with
established standards, tested to ensure the absence of voltage, and grounded if
determined necessary.
• Hazard -✓✓ A source of possible injury or damage to health
Answers | 2026 Update | Expert Verified
• Arc Flash Hazard -✓✓ A dangerous condition associated with the possible release of
energy caused by an electric arc
• Arc Rating -✓✓ The value attributed to materials that describes their performance to
exposure to an electrical arc discharge. The arc rating is expressed in cal/cm^2 and is
derived from the determined value of the arc thermal performance value (ATPV) or
energy of breakopen threshold (E BT) (should a material system exhibit a breakopen
resoponce below the APTV value). Arc rating is reported as either APTV or E bt,
whichever is the lower value.
• Barricade -✓✓ A physical obstruction such as tapes, cones, or A-frame-type wood or
metal structures intended to provide a warning and to limit access.
• Barrier -✓✓ A physical obstruction that is intended to prevent contact with equipment
or energized electrical conductors and circuit parts or to prevent unauthorized access to
a work area.
• Shock boundaries -✓✓ Limited approach boundary,
Restricted approach boundary,
Prohibited approach boundary (not in 2015)
• Limited approach boundary -✓✓ An approach limit at a distance from an exposed
energized electrical conductor or circtuit part within which a shock hazard exists.
• Restricted approach boundary -✓✓ An approach limit at a distance from an exposed
energized electrical conductor or circuit part within which there is an increased
likelihood of electric shock, due to electrical arc-over combined with inadvertent
movement, for personnel working in close proximity to the energized electrical
conductor or circuit part.
• Arc Flash Boundary -✓✓ When an arc flash hazard exists, an approach limit at a
distance from a prospective arc source within which a person could receive a second
degree burn if an electrical arc flash were to occur.
• Electrically safe work condition -✓✓ A state in which an electrical conductor or circuit
part has been disconnected from energized parts, locked/tagged in accordance with
established standards, tested to ensure the absence of voltage, and grounded if
determined necessary.
• Hazard -✓✓ A source of possible injury or damage to health
