400A 3 Phase Meter Socket Enclosures

For a 400A 3 phase service, conductors are typically sized at 600 kcmil copper or 900 kcmil aluminum per phase, based on NEC Table 310.16. Actual wire size depends on conduit fill, ambient temperature, and conductor material. Always consult a licensed electrician and your local utility to confirm conductor sizing to meet code and utility requirements.

A 400A meter socket enclosure must comply with NEC Article 230 for service entrance equipment, be UL listed, and meet local utility specifications such as EUSERC standards. Enclosures must carry appropriate NEMA ratings for the installation environment (NEMA 1 for indoor, NEMA 3R for outdoor). Seismic compliance per UBC, CBC, and IBC is also required in applicable zones.

A Meter Main combines the utility meter socket and the main disconnect breaker in a single enclosure, serving as the primary service entrance. A Service Entrance Section (SES) is a modular switchgear section designed to integrate into a larger switchboard assembly. Both are available in NEMA 1 and NEMA 3R configurations and must be built to approved utility specifications.

DEI Power offers 400A 3 phase meter socket enclosures across a full range of voltage configurations including 120/240V, 208Y/120V, 240V, 240/120V, 480V, 480Y/277V, and 415/240V. This ensures compatibility with virtually all commercial, industrial, and utility power distribution systems in North America and beyond.

Yes. All 400A 3 phase meter socket enclosures are available in NEMA 3R-rated configurations, which provide weatherproof protection against rain, sleet, and external ice formation. NEMA 1 enclosures are designed for indoor installations. The appropriate NEMA rating should be selected based on the installation environment and local utility requirements.

Yes. All enclosures offered by DEI Power meet seismic compliance requirements under the Uniform Building Code (UBC), California Building Code (CBC), and International Building Code (IBC) for all seismic zones. This makes them suitable for installation in California and other high-seismic-risk regions where structural compliance is mandatory for electrical service entrance equipment.