Power Transmission & Distribution Equipment

Switchgear is a higher-capacity assembly used for power distribution, protection, and isolation at the service entrance or main distribution level, typically rated 400A to 4000A. Switchboards are similar but generally designed for smaller, more modular branch circuit distribution in commercial and industrial buildings. Both are available in NEMA 1 (indoor) and NEMA 3R (outdoor) enclosures and must comply with UL 891 standards for code compliance.

NEMA 1 enclosures are designed for indoor use in clean, dry environments and provide basic protection against contact with enclosed equipment. NEMA 3R enclosures are suitable for outdoor or wet locations and are weather-resistant, protecting against rain, sleet, and external ice formation. Choosing between NEMA 1 and NEMA 3R depends on where the equipment will be installed—indoors in conditioned spaces or outdoors on building exteriors and pads.

For commercial, industrial, and utility installations in the USA, power distribution equipment should carry UL listing or UL 891 certification for low-voltage switchgear assemblies. EUSERC approval is often required by utilities for service entrance equipment. Equipment should also meet seismic compliance standards under UBC, CBC, and IBC for all seismic zones. These certifications confirm code compliance, safety, and acceptance by inspectors and utilities.

DEI Power's power transmission and distribution equipment is available from 400A to 4000A across switchgear, switchboards, panelboards, meter mains, and service entrance sections. Voltage configurations include 120/240V, 208Y/120V, 240V, 480V, 480Y/277V, and 415/240V, supporting a wide range of commercial, industrial, and utility power system requirements. Remote power panels are available from 225A to 1600A for data center and critical facility applications.

Power transmission and distribution equipment is used across commercial buildings and campuses, industrial facilities and manufacturing plants, utility infrastructure, data centers and colocation facilities, healthcare facilities, and telecommunications infrastructure. DEI Power's switchgear, switchboards, and panelboards are engineered to meet the uptime, code compliance, and load management demands of each of these environments.

DEI Power ships most in-stock orders within 1 business day from their 50,000 sq. ft. facility in Ontario, California, with standard delivery in 3–5 business days. Built-to-order and custom-configured equipment typically carries a 4–6 week lead time. Free shipping is included on all orders. For time-critical projects or emergency replacements, same-day quoting and expedited fulfillment are available by calling (866) 773-8050.