Meter Main NEMA 1/3R
- 400A to 4000A amperage range available
- 7 voltage configs from 120V to 480V
- UL 891, EUSERC & seismic zone rated
UL 891 Certified
EUSERC Approved
Approved Siemens OEM
GE 400 Amp Meter Main Combo units are heavy-duty, UL-listed switchgear assemblies designed for commercial, industrial, and utility power distribution. Available in NEMA 1 and NEMA 3R enclosures across multiple voltage configurations, these meter mains combine metering and main disconnect functions for safe, code-compliant electrical service management.
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For a 400-amp service, NEC guidelines typically require 1000 kcmil copper or 1250 kcmil aluminum conductors per phase for a single-conductor run. For parallel runs, two sets of 500 kcmil copper or 600 kcmil aluminum per phase are commonly used. Always consult your local electrical code and a licensed engineer to confirm conductor sizing based on conduit fill, temperature rating, and installation conditions.
Talk to our experts for custom solutions and tailored guidance.
Meter main combos provide code-compliant service entrance control for office buildings, retail centers, and campuses.
Heavy-duty meter mains support high-amperage power distribution in factories, processing plants, and production facilities.
EUSERC-approved meter mains meet utility specifications for substations, infrastructure projects, and grid-tied service points.
High-capacity meter main assemblies provide reliable, monitored electrical service entry for data center and colocation facilities.
Talk to our experts for custom solutions and tailored guidance.
As an approved Siemens OEM, DEI Power delivers precision-engineered meter main assemblies built with genuine Siemens components you can trust on every project.
In-house manufacturing at our 50,000 sq. ft. Ontario, CA facility means faster builds, fewer delays, and most orders shipping within 1 business day.
Every unit is UL 891 certified, EUSERC Approved, and meets UBC, CBC, and IBC seismic requirements — reducing change orders and field compliance risk.
Submit your project details and our technical team will respond with pricing, configuration guidance, and lead time within one business day.
For immediate assistance, feel free to give us a direct call at (866) 773-8050. You can also send us a quick email at sales@deipower.com.
For immediate assistance, feel free to give us a direct call at (866) 773-8050. You can also send us a quick email at sales@deipower.com.