NFPA 70E Exam | Most Recent Questions and
Answers | 2026 Update | Exam Review Pack
• What is NFPA 70E? -✓✓ A workplace electrical safety standard focused on safe work
practices around electrical hazards like shock, electrocution, arc flash, and arc blast.
• How should you explain NFPA 70E in an interview? -✓✓ NFPA 70E is about
recognizing electrical hazards, reducing risk, establishing electrically safe work
conditions, and using proper procedures/PPE when energized work cannot be avoided.
• What is the main NFPA 70E mindset? -✓✓ De-energize whenever possible, verify
absence of voltage, control hazardous energy, and only perform energized work when
justified and properly protected.
• What are the main electrical hazards covered by NFPA 70E? -✓✓ Electric shock,
electrocution, arc flash, arc blast, burns, and related electrical energy hazards.
• What is an electrically safe work condition? -✓✓ A state where equipment is isolated
from electrical sources, locked/tagged, verified de-energized, and stored electrical
energy is released or controlled.
• What is LOTO? -✓✓ Lockout/tagout: a procedure to isolate hazardous energy and
prevent unexpected energization while work is being performed.
• Why is LOTO important? -✓✓ It protects workers from unexpected energization,
backfeed, stored energy, and accidental operation of equipment.
• What does 'test before touch' mean? -✓✓ Do not assume equipment is de-energized;
verify absence of voltage with an appropriate meter before contacting conductors or
circuit parts.
• What should you do before trusting a voltage tester? -✓✓ Verify the tester on a known
live source, test the equipment, then re-verify the tester on a known live source.
• Why is verifying absence of voltage critical? -✓✓ Equipment can be mislabeled,
backfed, incorrectly switched, or still energized from stored or alternate energy sources.
• What is a qualified person under NFPA 70E? -✓✓ Someone trained to recognize
electrical hazards, understand equipment and procedures, and use appropriate safety
practices and PPE for the task.
• What is an unqualified person? -✓✓ Someone who is not trained or authorized to work
on or near exposed energized electrical conductors or circuit parts.
, • What is shock risk assessment? -✓✓ A process to identify shock hazards, determine
voltage exposure, approach boundaries, required controls, and PPE.
• What is arc flash risk assessment? -✓✓ A process to determine whether an arc flash
hazard exists, estimate severity, set boundaries/PPE, and reduce the likelihood of an
incident.
• What is the limited approach boundary? -✓✓ A distance from exposed energized parts
where shock protection controls are needed for unqualified persons to enter.
• What is the restricted approach boundary? -✓✓ A closer distance to exposed
energized parts where increased shock protection, training, PPE, and work controls are
required.
• What is the arc flash boundary? -✓✓ The distance from a potential arc source where a
person could receive a specified burn injury without proper protection.
• Limited vs restricted approach boundary? -✓✓ Limited is the outer shock boundary;
restricted is closer to exposed energized parts and requires higher control and
qualification.
• Shock boundary vs arc flash boundary? -✓✓ Shock boundaries protect against electric
shock from exposed energized parts; arc flash boundary protects against thermal
energy from an arc flash.
• What is incident energy? -✓✓ The amount of thermal energy from an arc flash at a
working distance, usually expressed in cal/cm².
• Why does incident energy matter? -✓✓ It helps determine arc-rated PPE requirements
and the severity of potential arc flash exposure.
• What does arc-rated clothing mean? -✓✓ Clothing tested to resist ignition and reduce
burn injury from arc flash thermal energy.
• What is the difference between arc-rated and flame-resistant? -✓✓ Flame-resistant
clothing resists ignition; arc-rated clothing is tested for arc flash exposure and has an
arc rating.
• What is PPE? -✓✓ Personal protective equipment, such as arc-rated clothing, face
shield or hood, gloves, safety glasses, hearing protection, and voltage-rated rubber
gloves when required.
Answers | 2026 Update | Exam Review Pack
• What is NFPA 70E? -✓✓ A workplace electrical safety standard focused on safe work
practices around electrical hazards like shock, electrocution, arc flash, and arc blast.
• How should you explain NFPA 70E in an interview? -✓✓ NFPA 70E is about
recognizing electrical hazards, reducing risk, establishing electrically safe work
conditions, and using proper procedures/PPE when energized work cannot be avoided.
• What is the main NFPA 70E mindset? -✓✓ De-energize whenever possible, verify
absence of voltage, control hazardous energy, and only perform energized work when
justified and properly protected.
• What are the main electrical hazards covered by NFPA 70E? -✓✓ Electric shock,
electrocution, arc flash, arc blast, burns, and related electrical energy hazards.
• What is an electrically safe work condition? -✓✓ A state where equipment is isolated
from electrical sources, locked/tagged, verified de-energized, and stored electrical
energy is released or controlled.
• What is LOTO? -✓✓ Lockout/tagout: a procedure to isolate hazardous energy and
prevent unexpected energization while work is being performed.
• Why is LOTO important? -✓✓ It protects workers from unexpected energization,
backfeed, stored energy, and accidental operation of equipment.
• What does 'test before touch' mean? -✓✓ Do not assume equipment is de-energized;
verify absence of voltage with an appropriate meter before contacting conductors or
circuit parts.
• What should you do before trusting a voltage tester? -✓✓ Verify the tester on a known
live source, test the equipment, then re-verify the tester on a known live source.
• Why is verifying absence of voltage critical? -✓✓ Equipment can be mislabeled,
backfed, incorrectly switched, or still energized from stored or alternate energy sources.
• What is a qualified person under NFPA 70E? -✓✓ Someone trained to recognize
electrical hazards, understand equipment and procedures, and use appropriate safety
practices and PPE for the task.
• What is an unqualified person? -✓✓ Someone who is not trained or authorized to work
on or near exposed energized electrical conductors or circuit parts.
, • What is shock risk assessment? -✓✓ A process to identify shock hazards, determine
voltage exposure, approach boundaries, required controls, and PPE.
• What is arc flash risk assessment? -✓✓ A process to determine whether an arc flash
hazard exists, estimate severity, set boundaries/PPE, and reduce the likelihood of an
incident.
• What is the limited approach boundary? -✓✓ A distance from exposed energized parts
where shock protection controls are needed for unqualified persons to enter.
• What is the restricted approach boundary? -✓✓ A closer distance to exposed
energized parts where increased shock protection, training, PPE, and work controls are
required.
• What is the arc flash boundary? -✓✓ The distance from a potential arc source where a
person could receive a specified burn injury without proper protection.
• Limited vs restricted approach boundary? -✓✓ Limited is the outer shock boundary;
restricted is closer to exposed energized parts and requires higher control and
qualification.
• Shock boundary vs arc flash boundary? -✓✓ Shock boundaries protect against electric
shock from exposed energized parts; arc flash boundary protects against thermal
energy from an arc flash.
• What is incident energy? -✓✓ The amount of thermal energy from an arc flash at a
working distance, usually expressed in cal/cm².
• Why does incident energy matter? -✓✓ It helps determine arc-rated PPE requirements
and the severity of potential arc flash exposure.
• What does arc-rated clothing mean? -✓✓ Clothing tested to resist ignition and reduce
burn injury from arc flash thermal energy.
• What is the difference between arc-rated and flame-resistant? -✓✓ Flame-resistant
clothing resists ignition; arc-rated clothing is tested for arc flash exposure and has an
arc rating.
• What is PPE? -✓✓ Personal protective equipment, such as arc-rated clothing, face
shield or hood, gloves, safety glasses, hearing protection, and voltage-rated rubber
gloves when required.
