Siemens MC1224B1100ESC 12-Space 24-Circuit 100 Amp Surface Mount Meter Outdoor Meter Main and Meter Load Center Combinations Siemens provides a full range of Meter Combination Load Centers and Meter Mains that are built for safety ease of installation, and long term quality. A Meter Main is a device that provides a meter socket and a main breaker, a meter combination load center provides a socket, main breaker and load center interior. Siemens has also introduced a line of solar ready Meter Combination Load Centers. Suitable for use only as service entrance equipment Side-by-side construction; Surface Mount; EUSERC Compliant For Overhead or Underground feed applications 1-phase, 3-wire 120/240V AC Ring Meter Type; No Bypass Pad locking provisions on all devices UL Listed, 22,000 AIC rated NEMA Type 3R Outdoor Enclosure Check with local utility to confirm meter socket approval