Neutral-to-ground connections downstream of a main bonding jumper violate which code sections?

The neutral-to-ground connections downstream of a main bonding jumper can create safety hazards by establishing parallel paths for ground fault current, compromising the effectiveness of the grounding system. Section 250.24(A)(5) specifically addresses the need for the neutral conductor (grounded conductor) to be bonded to the grounding electrode system only at the service equipment. This ensures that there’s a single point of bonding used to prevent ground loops and electric shock hazards.

Section 250.30(A) also plays a role in installations with separately derived systems, outlining similar requirements for bonding and grounding at the point of the service disconnect. Thus, both sections emphasize the restriction against additional neutral-to-ground connections downstream of the main bonding jumper, as this practice can disrupt the intended function of the electrical system.

In contrast, the other options either refer to different aspects of grounding and bonding requirements or various methods of connecting components but do not specifically address the consequences of incorrect assumptions about neutral-to-ground connections related to the main bonding jumper. Therefore, the selection highlighting the two relevant sections that ensure proper system bonding is the correct answer.