Hazard Identification and Power Line Safety Flashcards
6 cards from real NCCCO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Hazard Identification and Power Line Safety flashcards as text
Under OSHA 1926.1408, what is the minimum required clearance when operating a crane near an energized power line rated at 50 kV or less?
Answer: 10 feet
OSHA 1926.1408 Table A specifies a minimum 10-foot clearance for lines up to 50 kV unless the line is de-energized and grounded, or an insulating link is used.
Before any crane operation near power lines, the employer must attempt to determine the voltage of the lines. If the voltage cannot be determined, what clearance applies?
Answer: 10 feet minimum until the utility confirms the voltage
OSHA 1926.1408(b) states that if the voltage cannot be determined, the minimum 10-foot clearance in Table A applies until the utility owner confirms the actual voltage.
Which hazard recognition step is required when a crane must work within the Table A distances of a power line?
Answer: Contact the utility owner and obtain written confirmation of voltage and whether de-energizing is feasible
OSHA 1926.1407 requires the employer to contact the utility before encroaching on Table A distances to discuss de-energizing, insulating, or relocating the line.
If a crane boom accidentally contacts a power line and the crane becomes energized, what should bystanders on the ground do?
Answer: Stay away and not touch the crane or any grounded object near it
When a crane contacts a power line, ground current can radiate outward. Anyone touching the crane or standing close can complete a circuit and be electrocuted. Bystanders must stay clear until the utility cuts power.
Under OSHA 1926 Subpart CC, which person is responsible for identifying power line hazards before crane setup begins?
Answer: The employer or competent person conducting the hazard assessment
OSHA 1926.1402 requires the employer to assess the site for power line hazards before equipment is assembled or used. A competent person typically conducts this assessment.
A spotter (dedicated observer) is used during operations near power lines. Which of the following is a correct requirement for the spotter?
Answer: The spotter must be positioned to clearly see the crane and power line and be in direct communication with the operator at all times
OSHA 1926.1409 requires the dedicated spotter to maintain continuous observation of the crane's proximity to the line and communicate in real time with the operator.