The main bonding jumper bonds the neutral to which component in a service panel?

• A. The conductor that bonds the neutral to the equipment grounding conductor
• B. The conductor that bonds the hot to the neutral
• C. The conductor that bonds the enclosure to the hot
• D. The conductor that bonds the grounding electrode conductor to the neutral

Answer: (A)

The main idea is that the bonding jumper creates a single bonding point between the neutral and the grounding path in the service equipment. This conductor ties the neutral conductor to the equipment grounding conductor (EGC) at the service panel, so fault current has a return path that allows the overcurrent protective device to trip and the system to be at a defined potential relative to earth. This bonding is only done at the service disconnect; subpanels must keep neutral and ground separate.

So, the conductor that bonds the neutral to the equipment grounding conductor is the one that establishes that essential connection between the neutral and the EGC.