Marathon; Power Distribution Block; Wire Size: Line Side: (1) 350 Kcmil - 6 Awg,load Side: (2) 2/0 - 14 Awg; Amperage Rating: 310 Amp For Copper Wire, 250 Amp For Aluminum Wire; Voltage Rating: 600 Vac/dc; Material: Connector: Tin Plated High Conductivity Aluminum; Insulator Base: Glass Filled Polycarbonate (thermoplastic); Terminal Set Screws: Tin Plated Aluminum; Connector Mounting Screws: Zincplated Steel; Size: 5.330 In Length X 4 In Width X 3.330 In Heigth; Maximum Insulator Base Temperature: 125 Deg C Ul Rti; Flammability Rating Of Insulator Base:ul 94v-0; Accessories: Snap-on Hinged Covers: Ch 133x (replace X With 1, 2 Or 3for Number Of Poles) Ul Recognized, Glass Filled Polycarbonate (thermoplastic).125 Deg C (ul Rti), Ul 94 V-0, Marker Strips; Storage And Transportation Temperature Range: -35 Deg C To 110 Deg C; Number Of Poles: 3