Electrical Safety and Grounding Flashcards
6 cards from real NWSA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Electrical Safety and Grounding flashcards as text
What is the minimum safe approach distance for unqualified workers near energized overhead power lines rated up to 50kV?
Answer: 10 feet
OSHA 1926.1408 requires unqualified workers to stay at least 10 feet away from energized overhead lines rated up to 50kV.
Which OSHA construction standard specifically covers general electrical safety requirements for construction workers?
Answer: 1926.416
OSHA 1926.416 establishes the general electrical safety requirements applicable to workers in the construction industry.
What color identifies the equipment grounding conductor in standard US electrical wiring?
Answer: Green or bare copper
US wiring standards identify the equipment grounding conductor by green insulation or bare (uninsulated) copper.
GFCI protection on construction sites is required for which type of power?
Answer: Temporary power distribution and portable electric tools
OSHA requires GFCI protection for all 120-volt, single-phase temporary power outlets and portable electric tools used at construction sites.
The primary purpose of electrically bonding two metallic tower components together is to:
Answer: Equalize electrical potential and prevent arcing or shock
Bonding eliminates voltage differences between metallic components, preventing dangerous arcing, sparking, or electric shock hazards.
Static electricity buildup on a tower structure poses which primary hazard to workers?
Answer: Shock or ignition of flammable materials upon discharge
Accumulated static charge can discharge suddenly, delivering a shock to workers or igniting nearby flammable vapors and fuels.