What type of connection devices is prohibited for grounding solutions?

Solder-only devices are prohibited for grounding solutions because they do not provide a reliable and robust long-term electrical connection. While soldering can create a good conductive path initially, it is vulnerable to issues such as thermal expansion, mechanical forces, and environmental conditions. These factors can lead to joint failure over time, compromising the integrity of the grounding system. For grounding applications, connections must be able to withstand both mechanical strain and corrosion over the life of the installation, which is why other connection methods, such as pressure connectors or exothermic welds, are preferred. These methods provide more stable and durable connections critical for ensuring safety and effectiveness in grounding systems.