NFPA 70E Exam Study Guide 2026–2027 | Complete
Electrical Safety in the Workplace Questions,
Answers & Certification Prep
Arrangement of 70E - correct answers -Introduction (Article 90)
Chapter 1 Safety Related Work Practices
Chapter 2 Safety Related Maintenance Requirements
Chapter 3 Safety Requirements for Special Equipment
Annexes (Article 350)
Arc Flash Hazard - correct answers -A dangerous condition associated with the possible release of
energy caused by an electric arc
Arc Rating - correct answers -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 - correct answers -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 - correct answers -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 - correct answers -Limited approach boundary,
Restricted approach boundary,
1
, Prohibited approach boundary (not in 2015)
Limited approach boundary - correct answers -An approach limit at a distance from an exposed
energized electrical conductor or circtuit part within which a shock hazard exists.
Restricted approach boundary - correct answers -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 - correct answers -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 - correct answers -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 - correct answers -A source of possible injury or damage to health
Incident Energy - correct answers -The amount of thermal energy impressed on a surface, a certain
distance from the source, generated during an electrical arc event. Incident energy is typically expressed
in calories per square centimeter.
Incident energy analysis - correct answers -A component of an arc flash risk assessment used to predict
the incident energy of an arc flash for a specified set of conditions.
2
Electrical Safety in the Workplace Questions,
Answers & Certification Prep
Arrangement of 70E - correct answers -Introduction (Article 90)
Chapter 1 Safety Related Work Practices
Chapter 2 Safety Related Maintenance Requirements
Chapter 3 Safety Requirements for Special Equipment
Annexes (Article 350)
Arc Flash Hazard - correct answers -A dangerous condition associated with the possible release of
energy caused by an electric arc
Arc Rating - correct answers -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 - correct answers -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 - correct answers -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 - correct answers -Limited approach boundary,
Restricted approach boundary,
1
, Prohibited approach boundary (not in 2015)
Limited approach boundary - correct answers -An approach limit at a distance from an exposed
energized electrical conductor or circtuit part within which a shock hazard exists.
Restricted approach boundary - correct answers -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 - correct answers -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 - correct answers -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 - correct answers -A source of possible injury or damage to health
Incident Energy - correct answers -The amount of thermal energy impressed on a surface, a certain
distance from the source, generated during an electrical arc event. Incident energy is typically expressed
in calories per square centimeter.
Incident energy analysis - correct answers -A component of an arc flash risk assessment used to predict
the incident energy of an arc flash for a specified set of conditions.
2
