Eaton 1MTBE800R Main Terminal Box - UL Listed
Part Number: 1MTBE800R
Quick Summary
Eaton 1MTBE800R main terminal box enables rugged 800A power distribution in underground, three-wire, single-phase installs. It addresses pull-box proliferation and noncompliant wiring layouts that slow projects. UL Listed, EUSERC Approved, and a NEMA 3R enclosure ensure safety, code compliance, and outdoor durability. Designed to integrate with Eaton’s metering and distribution products, it helps reduce installation time and total project cost. With robust lug landing pads and top/bottom feed, it supports faster, safer connections in demanding environments.
Product Information
Extended Description
1MTBE800R Eaton: Eaton main terminal box, Utility pull box, 800A, Copper, NEMA 3R, Underground, Three-wire, Single-phase, Compression Lugs, 120/240V
Product Name
Eaton main terminal box
Catalog Number
1MTBE800R
UPC
782113965437
Product Length/Depth
25.875 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
Meets EUSERC electrical requirements and eliminates the need to add additional pull box section.
Type
EUSERC
Amperage Rating
800A
Bus material
Aluminum
Feed type
Top/bottom
Phase
Single-phase
Voltage rating
120/240 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 : Pacific Gas and Electric (PG&E) CA : Sacramento Municipal Utility District (SMUD) WI : WE Energies / Wisconsin Public Service (WPS) HI : Hawaiian Electric WA : Puget Sound Energy WA : Tacoma Public Utilities
Enclosure
NEMA 3R
Number of wires
3
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 1MTBE800R
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 800A amperage rating with an aluminum bus provides a low-impedance path, improving feeder reliability and reducing heat rise. Business impact: fewer overload events and longer service life in large underground feeders. Application: ideal for three-wire, single-phase 120/240 V installations in underground distribution networks. Feature: NEMA 3R enclosure offers outdoor tolerance and weather resistance, enabling year-round operation in varied environments. Business impact: enhances safety and reduces enclosure-related maintenance costs. Application: outdoor utility pull boxes and remote metering sites. Feature: Top/bottom feed and crimp lug landing pads support flexible, fast wiring without needing separate lug kits. Business impact: cuts installation time and minimizes field errors. Application: rapid deployment in high-density electrical rooms or outdoor cabinets. Feature: EUSERC compliance and UL listing provide regulatory alignment and reliability. Business impact: lowers risk of noncompliance penalties and project delays. Application: utilities and commercial developers needing certified distribution solutions. Feature: 800A aluminum bus contrast with durable enclosure reduces weight for easier handling on site. Business impact: safer lifts and faster installation in constrained spaces. Application: retrofit and new-build projects with space limitations.
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FAQs
The 1MTBE800R supports top/bottom feed and uses crimp lug landing pads suitable for aluminum bus. It is UL Listed and EUSERC compliant, ensuring compatibility with Eaton distribution systems and many third-party components that meet these standards. Verify conductor sizes, enclosure clearance, and mounting provisions in your panel schedule to avoid conflicts and optimize wiring accuracy.
An 800A amperage rating signifies the terminal box is designed to safely carry high-capacity feeder loads, minimizing heat rise and voltage drop under peak conditions. Aluminum bus provides a lighter yet robust conductive path, improving overall feeder performance in underground installations and reducing the need for oversized downstream equipment.
Yes. The enclosure is rated NEMA 3R for outdoor use and is EUSERC approved, making it suitable for underground feeder scenarios and municipal installations. Its weather-resistant design, combined with UL listing, helps meet utility specifications while delivering reliable long-term operation in exposed environments.
The product is UL Listed, EUSERC Approved, and supports a wide range of utility approvals noted by Eaton, including regional operators. This combination provides strong regulatory compliance, safety assurances, and compatibility with utility requirements across multiple jurisdictions.
With a 1-year warranty (or 18 months from shipment per Eaton policy) and simplified wiring via top/bottom feeds, the 1MTBE800R reduces field labor and parts count. Its pull-box elimination notes mean fewer components, faster commissioning, and lower lifecycle costs, delivering tangible ROI in both new builds and retrofit projects.