Cable Tray Grounding Connector Grounding Wire Size 2/0 AWG to 250 kcmil STR 4/0 AWG SOL Material Copper Number of Wires - Grounding 2 Description/Special Features Direct Burial Ribbed Neck Bolt For Maximum Ground Conductor Wire Size 250 kcmil For Minimum Ground Conductor Wire Size 2/0 AWG SOL For Use With Aluminum Conductor Cable Tray Copper Conductors Flat Bar Grounding Wires Connected To Cable Tray Standards UL Listed Direct Burial UL467 Type - Grounding Connector Mechanical