What is the significance of Informational Note No. 2 after Table 130.5(C) in NFPA 70E?

The significance of Informational Note No. 2 after Table 130.5(C) in NFPA 70E lies in its role in clarifying the rationale behind the clearing times for overcurrent protective devices (OCPDs). This note enhances the understanding of how these devices function and the importance of their operational characteristics in ensuring electrical safety.

Clearing time is a crucial factor during electrical work because it determines how quickly a circuit can de-energize in the event of a fault, which subsequently influences the level of risk exposure for workers. The note indicates that understanding these clearing times is essential for assessing potential arc flash hazards, allowing for the development of appropriate safety measures and protective strategies.

By providing this rationale, Informational Note No. 2 supports the overarching goal of NFPA 70E, which is to protect employees from electrical hazards. It emphasizes the need for thorough knowledge of electrical systems and proper documentation, which are vital for ensuring safety in the workplace.