Why Use A Special Wire Brush Or Sandpaper To Lightly Brush The Wires When Installing Parallel Groove Clamps?

Exposed sections of the conductor often develop an oxide layer or have minor impurities, which can interfere with the electrical contact between pg clamp connector and the metal. A light brushing physically removes the oxide layer and surface impurities, keeping the conductor's metal surface clean.

After cleaning the conductor surface, the contact surface between pg clamps and the conductor adheres more directly. If aluminum stranded wire, copper stranded wire, or steel-cored aluminum stranded wire has an oxide film or stains on its surface, the wedge in single bolt parallel groove connector cannot achieve the designed clamping effect, potentially leading to higher connection resistance or increased heat.