Power Line Hazard Identification and Safety Procedures 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 Power Line Hazard Identification and Safety Procedures flashcards as text
What does OSHA's 'Table A' in 29 CFR 1926.1408 specify regarding power line approach distances?
Answer: Minimum clearance distances based on power line voltage
OSHA Table A provides the minimum clearance distances that must be maintained based on the voltage of the power line, ranging from 10 feet for unknown voltages up to much greater distances for extra-high voltage lines.
What information must an operator obtain from the utility company before working near power lines?
Answer: Voltage of the lines, confirmation of de-energization status if requested, and any required safety measures
Operators or their employers must contact the utility company to obtain line voltage information, de-energization confirmation when required, and any special safety requirements for working near their infrastructure.
Why are tag lines used during lifts near power lines, and what material should they be made of?
Answer: Tag lines should be non-conductive rope (synthetic fiber) to avoid creating an electrical path to ground workers
Tag lines must be made of non-conductive synthetic rope near power lines to prevent electricity from traveling down the tag line to the ground worker if the load or rigging contacts an energized line.
What is an insulating link (or insulating section) and when is it used on a crane?
Answer: An electrical insulator installed in the crane's load line to break the electrical circuit if the hook contacts a power line
An insulating link is installed in the load line between the crane and the hook/load to interrupt the electrical circuit, protecting the operator and crane structure if the load contacts an energized power line.
What is a proximity alarm and how does it contribute to power line safety?
Answer: A device that detects the electromagnetic field of energized power lines and warns operators before approaching minimum distances
Proximity alarms detect the electromagnetic field surrounding energized power lines and alert the operator when the crane approaches the alarm's set detection threshold, providing advance warning before reaching minimum approach distances.
Under OSHA 29 CFR 1926.1407, what is required when it is determined that no part of the crane will come within the minimum approach distance?
Answer: A determination must be documented and demarcation must be established to ensure the crane cannot enter the approach zone
When operations are planned outside minimum approach distances, the determination must be documented and physical controls such as barricades, warning lines, or spotters must be established to ensure the crane cannot inadvertently enter the approach zone.