CO42 Series meter sockets. 400 A (Main Lugs), 200 A per position, single phase 120/240 V; multiple position combination with compartment with or without breaker. Conductor range: Line: Dual rated connectors for 1 x 4 AWG-600 kcmil or 2 x 1/0 AWG-250 kcmil, Load: 6 AWG-250 kcmil. Aluminum tunnel type connectors for both load and line sides. Combination overhead/underground. Factory pre-bussed from main lugs to each position. Supplied with hub opening closure plate for underground service. Internal locking system for covers. Larger hub opening requires use of 3 in., 3-1/2 in., or 4 in. hubs unless BS052 adaptor plate is used. Supplied with screw type rings. Factory installed 2 pole circuit breaker, 10,000 A rms interrupting capacity. Siemens Type “QJ” breaker. Weatherproof Type 3R enclosure.