400 Amp Meter Main Combo — 120/240V Single Phase

NEMA 1 enclosures are designed for indoor use and protect against dust and incidental contact. NEMA 3R enclosures are rated for outdoor use and provide weather resistance against rain, sleet, and ice. Choosing the correct enclosure rating ensures the meter main operates safely and maintains compliance in its specific installation environment.

This product line supports multiple voltage configurations including 120/240V, 208Y/120V, 240V, 480V, and 480Y/277V. Amperage options range from 400A up to 4,000A. The 400A configuration at 120/240V single phase is a common choice for commercial buildings, light industrial facilities, and utility service entrance applications.

Yes. The NEMA 3R enclosure variant of the Meter Main is specifically engineered for outdoor installation. It provides protection against rain, sleet, and ice formation, making it suitable for exterior service entrance applications. The NEMA 1 variant is intended for indoor use only. Both options are UL Listed and EUSERC Approved.

The Meter Main unit measures 14" D × 30" W × 90" H and weighs approximately 300 lbs. These dimensions are important for planning installation space, structural support requirements, and transportation logistics. Contact DEI Power's project support team if you need configuration-specific dimensional drawings for your engineering plans.

Yes. Because utility standards vary by region, DEI Power provides specialist consultation to build meter main switchgear to approved utility specifications. Their in-house engineering team can configure voltage, amperage, and layout to match your utility's requirements, minimizing the risk of field rejections and costly change orders during project completion.

DEI Power offers free shipping on all orders. Most orders ship within one business day, with delivery in 3 to 5 business days. In rare cases, up to 5 business days may be required for processing. All units include a 1-year warranty. The 50,000 sq. ft. facility in Ontario, California enables rapid fulfillment for time-sensitive projects.