Power Distribution Blocks: Block Type - Power Distribution; Poles Per Block - 1; Openings Per Pole, Primary - 2; Conductor Size - Primary - 500-4; Openings Per Pole, Secondary - 2; Conductor Size - Secondary - 500-4; Conductor Material - CU/AL; Material - Housing - Polycarbonate; Material - Connector - Aluminum; Rating - Voltage - 600V; Rating - Amps - 760; Optional Cover - (1) 08590; Manufacturer Series - 68000,69000 Large