Indoor Electrical Enclosures & Junction Boxes

An electrical cabinet typically refers to a larger, free-standing metal housing used to protect and organize switchgear, panelboards, or distribution equipment, while an electrical enclosure is a broader term for any protective housing — including wall-mounted boxes, junction boxes, or cabinets. All DEI Power indoor units are NEMA 1-rated enclosures designed to house switchgear, switchboards, or panelboards in protected indoor environments.

NEMA 1 is a standard enclosure rating for indoor use only. It provides protection against contact with enclosed equipment and falling dirt, but is not rated for moisture or weather. DEI Power's indoor switchgear, panelboards, switchboards, and remote power panels are available in NEMA 1 configurations, making them ideal for protected indoor electrical rooms and data centers.

DEI Power's indoor electrical enclosures are available from 400A up to 4000A, covering a wide range of commercial, industrial, utility, and data center power distribution requirements. Voltage configurations include 120/240V, 208Y/120V, 240V, 480V, 480Y/277V, and 415/240V to match virtually any system specification.

Yes. All DEI Power indoor switchgear, switchboards, panelboards, meter mains, service entrance sections, and remote power panels carry UL Listed or UL 891 Certified status. This ensures each assembly meets nationally recognized safety standards and simplifies code compliance for inspections and utility approvals on commercial and industrial projects.

Indoor electrical enclosures are used across commercial buildings, industrial manufacturing facilities, data centers and colocation facilities, healthcare institutions, utility and infrastructure projects, and telecommunications sites. DEI Power's NEMA 1-rated switchgear and panelboards serve all these sectors, with configurations tailored to the power density and reliability demands of each application.

Most standard in-stock orders ship within 1 business day and are delivered to the job site in 3–5 business days with free shipping nationwide. Built-to-order custom configurations typically carry 4–6 week lead times. Emergency and rush orders are also supported from DEI Power's 50,000 sq. ft. fulfillment facility in Ontario, California.