Core TradesQuestion 179 of 700
In a service panel, the main bonding jumper serves PRIMARILY to:
a.Limit the total number of circuits in the panel
b.Increase the amperage available to the building
c.Reduce the voltage supplied to branch circuits
d.Connect the grounded (neutral) conductor to the equipment grounding system at the service
Explanation
The main bonding jumper ties the grounded (neutral) conductor to the equipment grounding system at the service, establishing the low-impedance fault path that lets breakers clear ground faults. It has nothing to do with limiting circuits, changing voltage, or increasing available amperage.
Law Reference: 2025 CA Electrical Code, Article 250 (Grounding and Bonding)Practice all 700 questions free — no signup required.
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