What type of connection is permitted between the ground wire and ground rod at the BCES parking lot light pole base?

In this scenario, the appropriate choice is thermoweld (cadweld) for the connection between the ground wire and ground rod at the parking lot light pole base. This connection method involves using a thermite reaction to weld the ground wire directly to the ground rod, creating a permanent bond that provides a low-resistance path to ground. This is particularly advantageous in outdoor environments where ensuring the integrity and durability of the ground connection is crucial for safety, as it minimizes the risk of corrosion and mechanical loosening over time.

Thermoweld connections are also recognized for their reliability in high current or fault conditions, as they are less susceptible to the mechanical stress and deterioration that can affect other connection types. This quality makes them suitable for grounding applications where consistent performance is essential.

Alternative connection methods such as split-bolts, ground rod clamps, and mechanical crimping have their uses but may not offer the same level of longevity and resistance to environmental factors as thermoweld connections. For example, while ground rod clamps can provide a secure attachment, they may not maintain their grip as effectively over long periods, especially in potentially corrosive or variable conditions encountered at an outdoor installation like a parking lot light pole.