How often must live line tools used for primary protection be electrically tested?

Live line tools used for primary protection are crucial for ensuring the safety of workers who operate on or near energized electrical systems. To maintain their safety and effectiveness, these tools must undergo regular electrical testing. The correct frequency for this testing is every two years.

This biennial testing requirement is established because it allows for the assessment of the integrity of the tools, ensuring that any deterioration or potential failure is identified before the tools are used in critical work environments. Regular testing every two years can help prevent accidents, as it checks the insulation integrity and operational capabilities of the equipment, which is vital for protecting workers from electrical hazards.

In contrast, testing frequencies that are too short or too long may not provide adequate assurance of safety. Testing every six months or every year might seem prudent but could lead to unnecessary resource expenditure, while testing every five years could pose a risk, as any degradation occurring in the tools would not be identified in a timely manner. Hence, a two-year interval strikes a balance between safety assurance and practical operational consideration.