Meter Socket Circuit Breaker - 320 Amp

RONK’s Meter Socket Breaker (MSB) units provide a reliable, all-in-one solution for utility-approved service installations. Designed for durability and ease of installation, these units combine a meter socket and circuit breaker(s) into a single enclosure, streamlining electrical service while ensuring safe and efficient power distribution. Built to withstand the toughest environmental conditions, RONK MSB units are ideal for both overhead and underground applications, offering long-lasting performance in residential, commercial, and light industrial settings.

Available in a variety of meter socket and breaker configurations, RONK’s MSB units are designed to meet the specific requirements of local utilities across multiple states. With dozens of utility approvals, these units provide the flexibility needed to accommodate different service applications, making them a trusted choice for electricians, general contractors, and utility providers.

As a company with a 75-year legacy in the electrical industry, RONK is a trusted partner committed to delivering high-quality, utility-approved solutions. Our MSB units are built to the highest standards, ensuring reliability, safety, and ease of use. When you choose RONK, you’re choosing a name known for expertise, innovation, and a steadfast commitment to serving the power distribution needs of customers nationwide.

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.

Features and Benefits:

• NEMA 3R – lightweight aluminum enclosure
• Factory breaker terminal load lugs
• Underground entry only
• Suitable for use only as service equipment (SUSE)
• Separate cover on meter socket section – built to meet the NEC code section 230.62
• 25K Short Circuit Rating (SCCR)
• Manufactured in the USA