Best 400 Amp 3 Phase Meter Submeters for Modern Electrical Systems
Choosing a 400A 3-phase meter can help property managers and facilities leaders monitor energy usage, track TOU billing, and integrate cloud-based metering. The selections below highlight UL-listed, NRTL-approved meters and enclosures designed for 3-phase systems, with supporting features like RS485, CT configurations, and easy installation. This guide emphasizes reliability, compatibility with common building panels, and options suitable for both indoor and outdoor installations.
Summary Of Chosen Products
| Product | Brand | Type / Key Feature | Voltage / CT |
|---|---|---|---|
| DAE P254-400 KIT | DAE | UL kWh smart submeter, 3-phase, includes 3 CTs | 120-480V, 3 CTs |
| SIEMENS 48104-02GP Meter Socket | SIEMENS | RingleSS Type, outdoor enclosure, 320A continuous | 1 Phase, 3 Wire |
| MILBANK U4911-X-BL | MILBANK | 3-Phase, 400A, 7-terminal, RingleSS with lever bypass | 3-Phase |
| DAE P256-400-S KIT | DAE | UL kWh smart submeter, 3-phase, 3 CTs | 277/480V, 3 CTs |
| DAE P254-400-S KIT | DAE | UL kWh smart submeter, 3-phase, 3 solid core CTs | 120-480V, 3 CTs |
DAE P254-400 KIT Submeter With Three CTs
The DAE P254-400 KIT is a UL/cUL-listed 400A submeter designed for 3-phase systems. It supports 120-480V operation and includes three CTs with an inner diameter of 1.38 inches. The meter is compatible with both 3-wire and 4-wire configurations (with or without a Neutral). A lower cover with conduits knockouts facilitates straightforward installation. UL confirmation indicates no fuse is required when connecting to a main breaker, and it integrates with DAE’s cloud metering capabilities through the CC2030 gateway for real-time data, TOU reports, and tenant billing. Indoor use is standard, with optional outdoor enclosures available.
SIEMENS 48104-02GP Meter Socket
The Siemens 48104-02GP is a ringleSS-type meter socket rated for 320A continuous use with a 400A maximum, housed in an outdoor NEMA 3R enclosure. It is a 1-phase, 3-wire configuration designed for rugged building environments. Its durable G90 steel construction supports exterior installation, helping meet code-ready requirements for outdoor electrical rooms or building exteriors. This option pairs well with submetering schemes in phased renovations or new builds that require reliable, weather-sealed metering enclosures.
MILBANK U4911-X-BL 3-Phase 400A Meter Enclosure
This MILBANK model is a 3-phase, 400A enclosure featuring a 7-terminal ringleSS large closing plate lever bypass design. It includes a 9-16 inch barrel lock with bracket provisions for secure mounting. The lever bypass provides a practical path for service continuity during maintenance, making it suitable for larger multifamily or commercial installations where reliability and access control matter. The unit is designed for robust performance in demanding environments and integrates well with compatible 3-phase meters and CT configurations.
Cooper B-Line 324 N Meter Enclosure
The Cooper B-Line 324 N is a compact 400A, 1-phase meter enclosure designed for underground (UG) applications with a 3-wire system. It features a narrow footprint and a 3R IP/NEMA rating, suitable for outdoor installations in space-constrained areas. Its design accommodates a 4-jaw mechanism and MCC bypass options, offering straightforward integration with standard metering hardware in single-phase commercial or residential settings. Compatibility with general-purpose CTs makes it a flexible choice for retrofits and new builds alike.
DAE P254-400-S KIT Submeter With Solid Core CTs
The DAE P254-400-S KIT features UL/cUL listing and ANSI C12.1/C12.20 accuracy standards with 0.5% revenue-grade accuracy. It ships with three solid-core CTs (inner diameter 1.38″) and a lower cover with conduit knockouts. This kit also supports 3-phase applications with options for 3-wire or 4-wire wiring, and it emphasizes DAE’s cloud metering through CC2030 gateways for real-time energy data, monthly kWh, and TOU reporting. Indoor use is standard, with outdoor enclosures available for harsher environments.
Buying Guide
- Voltage compatibility: Ensure the meter supports your system voltage (commonly 120-480V for 3-phase installations). Some kits offer 277/480V variants suitable for commercial buildings.
- CT configuration: Decide between split CTs or solid-core CTs based on available space and installation complexity. 1.38″ inner-diameter CTs are common in these kits and fit standard meter enclosures.
- Panel integration: Check whether the enclosure fits your existing panel layout and if a BYPASS option is needed for maintenance access.
- Bypass and security: Lever bypass options enhance service continuity. Consider enclosure ratings (NEMA 3R, IP ratings) for outdoor installations.
- Communication features: RS485 or Ethernet-enabled gateways (like CC2030) enable cloud metering, real-time dashboards, and TOU reporting. This is useful for landlords and property managers who require remote access.
- UL/cUL and standards compliance: Verify listed status and conformity to ANSI C12.1, C12.20 for revenue-grade accuracy, especially in multi-tenant or public-facing billing scenarios.
- Indoor vs outdoor installation: Indoor-only meters are simpler, but outdoor-rated enclosures are essential for exterior walls or equipment pads in many buildings.
- Future scalability: If building needs might expand from 400A to higher demands, select enclosures with flexible mounting and plug-in CTs that support higher circuits.
- Brand support and compatibility: Popular brands like DAE, Siemens, Milbank, Cooper B-Line offer broad compatibility with standard busbars, CTs, and door interlocks. Check product manuals for wiring diagrams to minimize installation errors.
- Data access: Cloud metering subscriptions or gateways add value through remote monitoring, energy dashboards, and tenant billing. Consider the total cost of ownership including software access and support.