What does the general limit of approach (safety concept) in NFPA 70E define?

What does the general limit of approach (safety concept) in NFPA 70E define?

• A. It defines limits on wattage for hand-held tools.
• B. It outlines the maximum permissible fault current in a circuit.
• C. It explains how to properly label energized equipment.
• D. It defines established safe boundaries for contact with energized parts, varying by voltage and PPE level.

Answer: (D)

The general limit of approach defines safe boundaries around exposed energized parts to prevent accidental contact or energy transfer. These boundaries are set based on the system’s voltage and the level of PPE (arc-rated clothing and other protective gear) you’re using. The idea is to give workers a clearly defined distance they should not cross unless they have the proper training, authorization, and protective equipment. Knowing these boundaries helps you plan safely: stay outside the boundary when you’re not protected, or enter only with the correct PPE and procedures if the task requires it. It’s not about tool wattage, fault current, or labeling; it’s about keeping people from getting shocked or exposed to arc flash by defining how close energized parts can be approached, with the allowable distance changing as voltage or PPE level changes.

The general limit of approach defines safe boundaries around exposed energized parts to prevent accidental contact or energy transfer. These boundaries are set based on the system’s voltage and the level of PPE (arc-rated clothing and other protective gear) you’re using. The idea is to give workers a clearly defined distance they should not cross unless they have the proper training, authorization, and protective equipment.

Knowing these boundaries helps you plan safely: stay outside the boundary when you’re not protected, or enter only with the correct PPE and procedures if the task requires it. It’s not about tool wattage, fault current, or labeling; it’s about keeping people from getting shocked or exposed to arc flash by defining how close energized parts can be approached, with the allowable distance changing as voltage or PPE level changes.