NEMA 3R Panelboards | Outdoor-Rated Electrical Panels

NEMA 3R enclosures are rated for both indoor and outdoor use, but they are specifically engineered for outdoor environments. They provide protection against falling rain, sleet, and ice formation, making them the standard choice for exterior-mounted electrical panels on building façades, utility pads, and other exposed installations.

DEI Power's NEMA 3R panelboards are available in a wide range of amperage ratings including 400, 600, 800, 1000, 1200, 1600, 2000, 2500, 3000, and 4000 Amps. This broad range ensures you can source the right panel for light commercial applications through large-scale industrial and utility power distribution systems.

These panelboards are available in multiple voltage configurations including 120/240V, 208Y/120V, 240V, 240/120V, 480V, 480Y/277V, and 415/240V. This flexibility supports a wide range of commercial, industrial, and utility electrical system designs across single-phase and three-phase applications.

Yes. All panelboards are UL 891 certified assemblies and EUSERC approved for utility applications. They also meet seismic compliance requirements under UBC, CBC, and IBC for all seismic zones. These certifications ensure the panels meet national safety standards and are accepted by inspectors and utilities across the United States.

NEMA 1 enclosures are designed for indoor use only and protect against dust and incidental contact. NEMA 3R enclosures add protection against outdoor weather conditions such as rain, sleet, and ice, making them suitable for exterior installations. DEI Power offers both ratings, and the correct choice depends on the installation environment.

Most orders ship within 1 business day from DEI Power's 50,000 sq. ft. facility in Ontario, California, with delivery in 3–5 business days. In rare cases, fulfillment may require up to 5 business days. Free shipping is included on all orders, and each panel ships with a 1-year manufacturer's warranty.