Electrical Safety Standards Flashcards

What is the recommended first action if a coworker is in contact with a live electrical source?

Answer: De-energize the source or use a non-conductive object; do not touch them directly

Never touch a victim still in contact with power; shut off the source or separate them with a non-conductive object.

Arc flash hazards are best mitigated by which control?

Answer: De-energizing equipment and wearing rated arc-flash PPE when live work is unavoidable

De-energizing eliminates arc flash risk; when live work is required, arc-rated PPE is essential.

What is the minimum working clearance concern OSHA addresses around electrical panels?

Answer: Adequate space must be kept clear for safe access and operation

OSHA requires sufficient clear working space in front of electrical equipment for safe access.

Double-insulated power tools are marked with which symbol?

Answer: A square within a square

The square-within-a-square symbol indicates a double-insulated tool that does not require a grounding prong.

Before using a portable electric tool, a worker should inspect for what?

Answer: Damaged cords, cracked housings, and missing ground prongs

Pre-use inspection should catch frayed cords, cracked casings, and missing grounding pins.

What hazard results from using an undersized extension cord for a high-load tool?

Answer: Overheating and voltage drop that can cause fire or tool damage

Undersized cords overheat and cause excessive voltage drop, risking fire and equipment damage.

Wet locations increase electrical hazard because water does what?

Answer: Lowers skin resistance and conducts current more easily

Moisture lowers the body's resistance and conducts electricity, greatly increasing shock severity.