Why Must The Parallel Groove Clamp Match The Conductor Material?

The metal material of pg clamp connector needs to be properly matched with the material of the conductor to achieve the desired contact performance. Conductors can be categorized as aluminum stranded wire, steel-cored aluminum stranded wire, copper conductors, etc., while pg clamps typically uses high-strength aluminum alloy or copper. When the two come into contact, the inner groove shape and contact surface profile tightly fit with the conductor cross-section, forming a stable electrical path.

Material matching also relates to the interaction of physical properties between different metals. For example, aluminum-to-aluminum single bolt parallel groove connector can exhibit lower resistance at the contact interface, while copper-to-copper bonding has higher conductivity. Improper handling of different combinations may induce electrochemical reactions at the contact point, especially when there are differences in surface treatment.