Eaton 3MTBE800R Main Terminal Box - UL Listed NEMA 3R
Part Number: 3MTBE800R
Quick Summary
With the Eaton 3MTBE800R main terminal box, you get rugged outdoor-capable distribution for high-current feeders. Maintenance and installation hassles are common when enclosures corrode or fail in wet environments, driving downtime and labor costs. UL Listed, EUSERC Approved, and a NEMA 3R enclosure ensure rugged, compliant performance for indoor and outdoor installations. This solution supports 800A service with top/bottom feed and four-wire capacity, delivering reliable, utility-grade performance for industrial controls while enabling quicker commissioning and safer operations for engineers and procurement teams. Its compatibility with crimp lug landing pads and straightforward mounting supports fast deployment in control rooms and outdoor yards.
Product Information
Extended Description
3MTBE800R Eaton: Eaton main terminal box, Riser box, 800A, Copper, NEMA 3R, Overhead/underground, Three-wire, Single-phase, 120/240V, Crimp lug landing pads (no lugs included)
Product Name
Eaton main terminal box
Catalog Number
3MTBE800R
UPC
782113965444
Product Length/Depth
30.875 in
Product Height
61 in
Product Width
11.875 in
Product Weight
150 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Compliances
EUSERC Approved
Certifications
UL Listed
Catalog Notes
Indoor or outdoor. Terminal box UL listed short-circuit rating is the least AIC rating of any installed main tenant breaker-to a maximum of 100,000 rms symmetrical amperes. For top feed, use Myer type hub
Type
EUSERC
Amperage Rating
800A
Bus material
Aluminum
Feed type
Top/bottom
Phase
Three-phase
Voltage rating
120/208 V
Wire size
Crimp lug landing pads (no lugs included)
Utility approvals
ID : Idaho Power OR : Idaho Power WA : Seattle City Light AK : Anchorage Municipal Light & Power NV : NV Energy CA : City of Los Angeles - DWP (LADWP) AZ : Southern California Edison CA : Southern California Edison CA : Sacramento Municipal Utility District (SMUD) WI : WE Energies / Wisconsin Public Service (WPS) WA : Puget Sound Energy WA : Tacoma Public Utilities
Enclosure
NEMA 3R
Number of wires
4
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MTBE800R
800A capacity with aluminum bus enables you to carry large feeders without excessive enclosure size. This translates to fewer cabinets and easier wiring management on the shop floor, while preserving robust fault-handling and voltage drop performance. It's suited for three-phase, 120/208 V systems in industrial facilities that require reliable power distribution and quick commissioning. Weather-ready protection ensures both indoor and outdoor installations endure wet, dusty, and high-traffic environments. The NEMA 3R enclosure enhances longevity and reduces maintenance downtime, supporting uptime in harsh conditions. Top and bottom feed configuration and four-wire capacity provide installation flexibility across overhead and underground feed networks. Crimp lug landing pads are included as landing options, while lugs themselves must be sourced separately, enabling customization to your preferred lug style and simplifying field assembly. Compliance and reliability are reinforced by UL Listed and EUSERC Approved status, with broad utility acceptances that streamline interconnection and permit planning for metering and service equipment. Installation efficiency and long-term value are further supported by documented catalog notes on short-circuit rating (up to 100,000 RMS with the proper main breaker) and the recommended Myers-type hub for top-feed configurations, reducing retrofit costs and field errors. Warranty and support from Eaton provide added confidence for long-term uptime and maintenance planning.
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FAQs
The 3MTBE800R supports top and bottom feed configurations with four-wire capacity. It uses crimp lug landing pads (lugs not included), allowing you to pair your preferred lug style and complete field terminations efficiently while meeting 3R enclosure requirements.
Key specs include an 800A amperage rating, aluminum bus material, three-phase configuration, 120/208 V, four wires, and a NEMA 3R enclosure. It is UL Listed and EUSERC Approved, with catalog notes detailing short-circuit rating up to 100,000 RMS with the proper main breaker.
Yes. The NEMA 3R enclosure provides weather resistance for indoor/outdoor use, and UL/EUSERC certifications support utility-grade acceptance, making it ideal for outdoor feeders in harsh environments while enabling safe, reliable operation.
The enclosure is UL Listed and EUSERC Approved, with additional utility approvals across various regions. This combination supports code compliance, utility interconnection, and broad market acceptance for metering and service applications.
Plan for a heavy, 150 lb enclosure and ensure proper mounting and clearances for top/bottom feed. Refer to catalog notes on short-circuit rating (up to 100,000 AIC with the appropriate main breaker) and the recommendation to use Myers-type hubs for top-feed installations to minimize field adjustments and ensure safety.