Why should terminals and solder cups not be modified?

The correct choice emphasizes the importance of ensuring that terminals and solder cups are designed to accommodate standard conductors without modification. When terminals and solder cups are modified, the inherent design specifications that allow for a secure and reliable attachment to the conductors may be compromised. This can lead to poor electrical connections, increased resistance, or even mechanical failure during operation.

Standard conductors are manufactured to fit specific terminal and solder cup configurations, which optimize electrical conductivity and mechanical strength. By adhering to these standards, manufacturers can guarantee compatibility and reliability in the assembly process.

While the other options highlight specific consequences of modification, they do not address the primary concern related to maintaining the integrity of electrical connections. Regulatory standards focus on compliance, but adherence to standardized fitting is critical to ensuring safety and performance in soldered assemblies. Overall, proper fitting is paramount to avoid issues like inadequate current flow or connection stability, which could lead to equipment failure.