NSC Electrical Safety Flashcards
6 cards from real NSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 NSC Electrical Safety flashcards as text
What is electrical 'double insulation' in portable tools, and why is it significant for safety?
Answer: Two independent insulation systems that eliminate the need for a ground prong
Double insulation uses two independent insulating systems so a single failure does not cause a shock hazard, allowing two-prong plugs on some tools.
When working near energized electrical equipment, which NSC-recommended practice reduces the risk of arc flash injury?
Answer: De-energizing and locking out the equipment before work begins whenever possible
The NSC and NFPA 70E both emphasize that de-energizing and locking out equipment before work is the best protection against arc flash.
According to NSC electrical safety guidelines, what is a 'qualified person' in the context of electrical work?
Answer: A person who has been trained and demonstrated skills to avoid electrical hazards while working on or near energized conductors
OSHA defines a qualified person as someone trained and proven capable of safely working on or near exposed energized conductors.
What hazard does a 'daisy-chained' power strip arrangement create in a workplace?
Answer: Overloading circuits, overheating, and increased fire risk
Daisy-chaining power strips overloads circuits beyond their rated capacity, generating heat and creating a serious fire hazard.
Which NSC-recommended practice should be followed when working in wet or damp locations with electrical equipment?
Answer: Use GFCI-protected outlets and ensure all tools and cords are rated for wet locations
GFCI protection combined with wet-location-rated equipment is the NSC-recommended approach for safe electrical work in damp environments.
What is the NSC recommendation regarding electrical panel boxes that are missing knockout blanks or covers?
Answer: They should be repaired immediately by installing appropriate covers to prevent exposure to energized parts
Open knockouts in electrical panels expose energized parts and must be covered immediately to prevent accidental contact and arc flash.