In Part 1, we noticed the NEC often uses "grounding" when it means "bonding." Grounding is a connection to the earth. But what does bonding really mean, and what are the implications of the five bonding terms in Article 100? The NEC defines first of those terms, “bonded (bonding)” as “Connected to establish electrical continuity and conductivity.” This leaves room for interpretation. For example, how much conductivity? One purpose of bonding is to ...

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