NEMA 1 Circuit Breakers

NEMA 1 provides general-purpose indoor protection against limited dust, falling dirt, and incidental contact with live parts. NEMA 2 adds protection against dripping and light splashing of non-corrosive liquids, making it suitable for environments with occasional moisture such as mechanical rooms or utility spaces. For standard dry indoor electrical rooms, NEMA 1 is typically sufficient and the most cost-effective option.

DEI Power's NEMA 1 circuit breaker and power distribution product line covers a wide range from 400A up to 4000A. Specific configurations include 400A, 600A, 800A, 1000A, 1200A, 1600A, 2000A, 2500A, 3000A, and 4000A across product types including switchgear, switchboards, panelboards, meter mains, service entrance sections, and remote power panels.

Yes. All DEI Power NEMA 1 power distribution products are UL listed and UL 891 certified for low-voltage switchgear applications. They are also manufactured as Siemens-approved OEM solutions and meet EUSERC approval standards. Products are built to comply with UBC, CBC, and IBC requirements for all seismic zones, ensuring code compliance across the USA.

NEMA 1 products from DEI Power support multiple voltage configurations including 120/240V, 240V, 208Y/120V, 480V, 480Y/277V, and 415/240V in both single-phase and three-phase arrangements. Multi-voltage options are available across all product types, making these solutions suitable for diverse commercial, industrial, data center, and utility electrical systems.

In-stock units typically ship within 1 business day from DEI Power's 50,000 sq. ft. Ontario, California facility, with delivery to the job site in 3–5 business days. Free shipping is included on all orders. Built-to-order configurations have typical lead times of 4–6 weeks. Emergency and rush orders are supported for time-critical deployments.

NEMA 1 power distribution equipment is commonly used in data centers and colocation facilities, healthcare facilities, commercial buildings, industrial manufacturing plants, telecommunications infrastructure, and utility substations. Because NEMA 1 enclosures are designed for controlled indoor environments, they are ideal for server rooms, electrical rooms, and mission-critical indoor power distribution applications where environmental exposure is not a concern.