NFPA 70E Questions and Answers |
Latest Version | 2025/2026 | Correct &
Verified
What is the primary purpose of NFPA 70E?
✔✔To establish safety requirements for electrical workers to reduce the risk of shock, arc flash,
and arc blast.
What is an arc flash?
✔✔A dangerous release of energy caused by an electrical fault that produces heat, light, and
pressure.
What is an arc blast?
✔✔The pressure wave from an electrical arc that can throw workers and equipment.
What does PPE stand for in NFPA 70E?
✔✔Personal Protective Equipment.
Why is voltage testing important before working on electrical equipment?
1
,✔✔To verify that the equipment is de-energized and safe to work on.
What is the purpose of a lockout/tagout procedure?
✔✔To prevent accidental energization of electrical equipment during maintenance.
What is the minimum approach distance for a qualified worker at 480V AC according to NFPA
70E?
✔✔18 inches.
What is the purpose of an energized work permit?
✔✔To document and justify work performed on energized equipment.
What is a flash protection boundary?
✔✔The distance from live parts within which a worker must wear arc-rated PPE.
What is the difference between a qualified and unqualified worker?
✔✔A qualified worker is trained and knowledgeable to work on energized electrical equipment;
an unqualified worker is not.
2
, Why is a risk assessment required before performing electrical work?
✔✔To identify hazards and determine safe work procedures and PPE.
What is the primary hazard when working on high-voltage equipment?
✔✔Electrical shock and arc flash injury.
Why is it important to maintain tools in good condition when working electrically?
✔✔Damaged or conductive tools can cause short circuits or shock.
What is the purpose of insulated tools?
✔✔To protect workers from electrical shock when working near live parts.
Why must rubber insulating gloves be regularly tested?
✔✔To ensure they maintain their dielectric properties and safety.
What is the incident energy in an arc flash scenario?
3
Latest Version | 2025/2026 | Correct &
Verified
What is the primary purpose of NFPA 70E?
✔✔To establish safety requirements for electrical workers to reduce the risk of shock, arc flash,
and arc blast.
What is an arc flash?
✔✔A dangerous release of energy caused by an electrical fault that produces heat, light, and
pressure.
What is an arc blast?
✔✔The pressure wave from an electrical arc that can throw workers and equipment.
What does PPE stand for in NFPA 70E?
✔✔Personal Protective Equipment.
Why is voltage testing important before working on electrical equipment?
1
,✔✔To verify that the equipment is de-energized and safe to work on.
What is the purpose of a lockout/tagout procedure?
✔✔To prevent accidental energization of electrical equipment during maintenance.
What is the minimum approach distance for a qualified worker at 480V AC according to NFPA
70E?
✔✔18 inches.
What is the purpose of an energized work permit?
✔✔To document and justify work performed on energized equipment.
What is a flash protection boundary?
✔✔The distance from live parts within which a worker must wear arc-rated PPE.
What is the difference between a qualified and unqualified worker?
✔✔A qualified worker is trained and knowledgeable to work on energized electrical equipment;
an unqualified worker is not.
2
, Why is a risk assessment required before performing electrical work?
✔✔To identify hazards and determine safe work procedures and PPE.
What is the primary hazard when working on high-voltage equipment?
✔✔Electrical shock and arc flash injury.
Why is it important to maintain tools in good condition when working electrically?
✔✔Damaged or conductive tools can cause short circuits or shock.
What is the purpose of insulated tools?
✔✔To protect workers from electrical shock when working near live parts.
Why must rubber insulating gloves be regularly tested?
✔✔To ensure they maintain their dielectric properties and safety.
What is the incident energy in an arc flash scenario?
3
