RONK’s 320-amp Meter Socket Circuit Breaker combo (MSB) units are specifically designed for underground installation. These lightweight units offer easy and straightforward installation, making them suitable for use only as service equipment (SUSE). They come in a NEMA 3R aluminum enclosure and are available with 4 and 5 jaw lever bypass options.

RONK MSB320LJ-UG 320AMP METER PED 4 JAW LEVER BYPASS, 200A/100A CIRCUIT BREAKERS - ALLIANT ENERGY