What is the purpose of an equipment bonding jumper in a device outlet box?

The purpose of an equipment bonding jumper in a device outlet box is primarily to connect the grounding conductors. This connection is essential as it ensures that any electrical faults that may occur can safely carry fault current back to the ground, effectively reducing the risk of electric shock or fire.

By bonding the equipment, it creates a low-resistance path for fault currents, which helps to ensure that protective devices, such as circuit breakers, will function properly in the event of a fault. This connection enhances the overall safety of the electrical system by maintaining the integrity of the grounding system.

The other choices do not accurately describe the role of an equipment bonding jumper. Increasing circuit voltage does not pertain to grounding but rather to power supply functions. Reducing resistance in the circuit and providing additional load are also unrelated to the primary function of grounding; instead, they concern different aspects of circuit design and performance.