Abb TMMR4412RF Meter Stack 400A 4-socket Ringless

Product Description

The ABB TMMR4412RF is a MiniMod meter stack designed for multi-tenant and residential service applications requiring metered power distribution. This unit provides a 400-amp main lug-only configuration with four 125-amp meter sockets in a 1-phase, 3-wire arrangement. The NEMA 3R enclosure provides protection against rain, sleet, and windblown debris, making it suitable for outdoor installations. The ringless socket design eliminates the need for a meter ring during installation and service. This meter stack carries Duke Energy approval, meeting that utility's specific requirements for metered service entrance equipment. Licensed electricians install this type of equipment at the service entrance level.

This meter stack is used in residential and light commercial multi-family applications where four individual metered services are required from a single 400-amp service entrance. Typical installations include duplexes, fourplexes, apartment buildings, and similar multi-tenant structures where each unit requires a separately metered 125-amp, 1-phase, 3-wire service. The outdoor-rated NEMA 3R enclosure suits installations on exterior walls or in utility areas subject to weather exposure. Duke Energy utility service territories that require ringless meter sockets are the primary deployment environment for this unit.

Key Features

• 400-amp main lug-only (MLO) service entrance rating across four sockets
• Four 125-amp, 1-phase, 3-wire (1P3W) meter sockets in a single stackable module
• Ringless socket design for simplified metering and utility access
• NEMA 3R enclosure rated for outdoor use, resistant to rain and windblown debris
• Duke Energy approved for use in qualifying utility service territories
• MiniMod modular platform supports stacking and service entrance configurations

Compatibility

Approved for use in Duke Energy service territories requiring ringless meter sockets. Designed for 1-phase, 3-wire multi-tenant residential and light commercial service entrance installations within the ABB MiniMod meter stack system.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local utility requirements. The service entrance must be de-energized and the utility must be notified before performing any connections or meter socket work. Verify Duke Energy approval requirements and local inspection jurisdiction rules prior to rough-in. The main service conductors must be properly sized and torqued to terminal specifications listed on the equipment nameplate.

Technical Specifications

• Main Lug Ampacity: 400 amps
• Meter Socket Quantity: 4
• Per-Socket Ampacity: 125 amps
• Phase Configuration: 1-phase, 3-wire (1P3W)
• Enclosure Rating: NEMA 3R
• Meter Socket Type: Ringless
• Utility Approval: Duke Energy Approved
• UPC: 783164486735

Standard Information

• Brand: ABB
• Manufacturer Part Number: TMMR4412RF