Home Electrical Distribution and Circuit Breakers Power Distribution Grounding and Bonding Connector and Clamps Grounding-Bonding Post, Bar-Flat Surface Panduit® StructuredGround™ SP2-4/0L-Q Type SP2 Service Post Connector, 2 Conductors, 1 to 4/0 AWG Conductor, 5/8-11 Stud, Copper