3-Phase 480V Delta & 380V Transformers

460V and 480V 3-phase are often used interchangeably in the field, but they are not exactly the same. 480V is the nominal system voltage defined by utility distribution standards in North America, while 460V is the rated voltage of many motors and equipment loads, accounting for voltage drop across feeders and wiring. Switchgear and panelboards rated 480V are suitable for use in both 460V and 480V systems.

DEI Power's 480V switchboards, panelboards, and service entrance sections are available in amperage ratings from 400A up to 4000A, including 400A, 600A, 800A, 1000A, 1200A, 1600A, 2000A, 2500A, 3000A, and 4000A configurations — covering a wide range of commercial, industrial, and utility load requirements.

All DEI Power 480V switchgear, panelboards, switchboards, and SES units are available in NEMA 1 (indoor) or NEMA 3R (outdoor, weather-resistant) enclosures. NEMA 1 is designed for dry indoor environments, while NEMA 3R provides protection against rain and weather for outdoor or exposed installations.

Yes. All 480V switchboards, panelboards, switchgear, and service entrance sections manufactured by DEI Power meet the seismic zone requirements of UBC, CBC, and IBC codes. This ensures safe installation in seismically active regions across the United States, including California, where DEI Power is headquartered.

DEI Power's 3-phase 480V products are UL 891 certified for low-voltage switchgear assemblies and EUSERC approved for utility-compatible service entrance applications. Many products are also manufactured under Siemens Approved OEM authorization, ensuring genuine component quality and performance backed by one of the industry's most recognized electrical brands.

Yes. Service entrance sections (SES), meter mains, and service entrance switchgear must be built to approved utility specifications per applicable utility standards. DEI Power's specialist team provides dedicated project support and SES consultation to ensure every assembly meets utility requirements and local codes before delivery.