Power Distribution Blocks: Block Type - Power Distribution; Poles Per Block - 3; Openings Per Pole, Primary - 1; Conductor Size - Primary - 600-4; Openings Per Pole, Secondary - 1; Conductor Size - Secondary - 600-4; Conductor Material - CU/AL; Material - Housing - Phenolic; Material - Connector - Aluminum; Rating - Voltage - 600V; Rating - Amps - 420; Optional Cover - CC1443; Manufacturer Series - 144