NFPA 70E Electrical Safety Masterclass 2026–2027 |
Complete Certification Review & Exam Success Guide
Arc Flash Hazard - correct answers -A source of possible injury or damage to
health associated with the 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 (Egr) (should a material system exhibit a
breakopen response below the ATPV value). Arc rating is reported as either ATPV or EBt, whichever is
the lower value.
Informational Note No. 1: Arc-rated clothing or equipment indicates that it has been tested for exposure
to an electric arc.
Informational Note No. 2: ATPV is defined in ASTM F1959/ F1959M, Standard Test Method for
Determining the Arc Rating of Materials for Clothing
balaclava - correct answers -.
An arc-rated head-protective fabric that protects the neck and head except for a small portion of the
facial area.
Boundary, Arc Flash - correct answers -When an arc flash hazard exists, an approach limit from an arc
source at which incident energy equals 1.2 cal/ cm^2
1
, Boundary, Limited Approach - correct answers -An approach limit at a distance from an exposed
energized electrical conductor or circuit part within which a shock hazard exists.
Boundary, Restricted Approach - 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.
Electrical Safety Program - correct answers -A documented program that identifies policies, procedures,
principles and safe work practices to protect workers exposed to electrical energy.
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.
Maintenance, Condition of - correct answers -The state of the electrical equipment considering the
manufacturers' instructions, manufacturers' recommendations, and applicable industry codes,
standards, and recommended practices.
Qualified person - correct answers -One who has demonstrated skills and knowledge related to the
construction and operation of electrical equipment and installations and has received safety training to
identify the hazards and reduce the associated risk.
Risk - correct answers -A combination of the likelihood of occurrence of injury or damage to health and
the severity of injury or damage to health that results from a hazard.
risk assessment - correct answers -An overall process that identifies hazards,
estimates the likelihood of occurrence of injury or damage to health, estimates severity of injury or
damage to health, determines if protective measures are required
2
Complete Certification Review & Exam Success Guide
Arc Flash Hazard - correct answers -A source of possible injury or damage to
health associated with the 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 (Egr) (should a material system exhibit a
breakopen response below the ATPV value). Arc rating is reported as either ATPV or EBt, whichever is
the lower value.
Informational Note No. 1: Arc-rated clothing or equipment indicates that it has been tested for exposure
to an electric arc.
Informational Note No. 2: ATPV is defined in ASTM F1959/ F1959M, Standard Test Method for
Determining the Arc Rating of Materials for Clothing
balaclava - correct answers -.
An arc-rated head-protective fabric that protects the neck and head except for a small portion of the
facial area.
Boundary, Arc Flash - correct answers -When an arc flash hazard exists, an approach limit from an arc
source at which incident energy equals 1.2 cal/ cm^2
1
, Boundary, Limited Approach - correct answers -An approach limit at a distance from an exposed
energized electrical conductor or circuit part within which a shock hazard exists.
Boundary, Restricted Approach - 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.
Electrical Safety Program - correct answers -A documented program that identifies policies, procedures,
principles and safe work practices to protect workers exposed to electrical energy.
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.
Maintenance, Condition of - correct answers -The state of the electrical equipment considering the
manufacturers' instructions, manufacturers' recommendations, and applicable industry codes,
standards, and recommended practices.
Qualified person - correct answers -One who has demonstrated skills and knowledge related to the
construction and operation of electrical equipment and installations and has received safety training to
identify the hazards and reduce the associated risk.
Risk - correct answers -A combination of the likelihood of occurrence of injury or damage to health and
the severity of injury or damage to health that results from a hazard.
risk assessment - correct answers -An overall process that identifies hazards,
estimates the likelihood of occurrence of injury or damage to health, estimates severity of injury or
damage to health, determines if protective measures are required
2
