What issue does using a popsicle eliminate when connecting a stranded aluminum conductor in a copper clamp?

Using a popsicle when connecting a stranded aluminum conductor in a copper clamp primarily addresses the issue of cold flow problems. Cold flow refers to the tendency of materials to deform under sustained mechanical stress. In electrical connections, especially where aluminum is in contact with copper, the differing physical and thermal properties can lead to complications.

Aluminum has a higher tendency to undergo cold flow than copper, particularly when compressed or clamped, which can lead to increased resistance at the connection point over time due to loosening or degradation of contact. By employing a popsicle, which serves as a supportive structure that prevents the aluminum conductor from deforming excessively, the connection maintains integrity and continues to conduct electricity efficiently.

In contrast, the other options, such as heat dissipation issues, electrical leakage, and mechanical stress, while they are important factors in electrical connections, are not directly mitigated by the use of a popsicle in the context of aluminum and copper connections. Thus, the use of a popsicle is primarily associated with preventing cold flow problems.