Two-meter distribution box

A two-meter distribution box is an electrical panel designed to house two separate utility meters, typically rated for 200 amps, with provisions for tenant main breakers and multiple circuit connections.

Overview

A two-meter distribution box, also known as a duplex or multi-family meter main panel, allows a single service entrance to supply power to two separate units or tenants. These panels are commonly used in duplex apartments, small commercial buildings, or multi-family dwellings. They combine metering and circuit distribution in one enclosure, simplifying installation and maintenance while ensuring compliance with electrical codes .

Key Features

• Amperage Rating: Most two-meter boxes are rated for 200 amps per meter, with branch circuit ratings typically at 125 amps .
• Meter Socket Type: Options include ring-type or ringless sockets, often with a horn bypass for utility access .
• Phase and Voltage: Standard configurations are 1-phase, 3-wire, 120/240V .
• Breaker Compatibility: Designed to accept plug-on or bolt-on type main tenant breakers, such as Siemens QP series or Eaton BR/CH types .
• Mounting Options: Can be surface-mounted or semi-flush, suitable for overhead or underground service feeds .
• Bus Rating: Typically 200–400 amps, depending on the model, ensuring safe distribution to branch circuits .
• Construction: Outdoor-rated enclosures are NEMA 3R or similar, weather-resistant, and UL listed for safety .

Popular Models

• Siemens Uni-PAK 2-Gang 200 Amp Ringless Metering: Supports two meters, horn bypass, 125A branch rating, surface or semi-flush mount, suitable for small apartments or commercial buildings .
• Siemens WPK2211 NEC 2020 Compliant: 2-position Uni-Pak, 200A bus rated, compatible with QP main breakers, designed for duplex apartments .
• Eaton 200A Ringless Meter Pack: 2-socket, 1-phase, 200A socket rating, requires bolt-on main tenant breakers, suitable for overhead or underground feeds .
• Siemens 200-Amp 2-Space 2-Circuit Meter Main: Side-by-side construction, surface mount, 5-jaw ringless meter socket, UL listed, XCEL Energy approved .

Installation Considerations

• Utility Approval: Always confirm with the local utility that the meter socket and panel are approved for service .
• Breaker Selection: Use compatible main breakers as specified by the manufacturer; for higher amperage, specific breaker models are required (e.g., Siemens Q2200B for 200A), .
• Feed Type: Panels support both overhead and underground service feeds, with appropriate hub openings for conduit connections .
• Code Compliance: Ensure compliance with NEC 2020 or local electrical codes, especially for multi-family installations .

Advantages

• Space Efficiency: Combines two meters and distribution in a single enclosure.
• Simplified Wiring: Pre-bussed panels reduce installation complexity.
• Safety: UL listed, weather-resistant, and designed for proper grounding and neutral connections.
• Flexibility: Supports multiple breaker types and configurations for future expansion. Two-meter distribution boxes are essential for duplex or multi-tenant setups, providing a safe, code-compliant, and efficient solution for managing electrical service and distribution.