Eaton Main Terminal Box Utilit...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,024.50
$953.25
Eaton main terminal box, Utility pull box, 1200A, Aluminum, 3R, Underground, Three-wire, Single-, #2-600 kcmil, 120/240V

Eaton Main Terminal Box Utility Pull Box 800A Single-Phase 120/240V NEMA 3R Underground Aluminum

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Model: 1MTB800R

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,024.50
$953.25
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Eaton Main Terminal Box Utility Pull Box

Professional Underground Electrical Distribution Terminal Box

The Eaton Main Terminal Box delivers exceptional electrical power distribution performance for underground utility applications. This 800A single-phase terminal box provides reliable electrical connection and distribution designed for professional electricians, electrical contractors, and utility professionals, offering the proven reliability and advanced technology that professionals trust from the global leader in intelligent power management.

Professional Features & Benefits

Electrical Performance & Capacity

  • 800A Current Rating - High-capacity electrical distribution for demanding utility and commercial applications with reliable current handling
  • 120/240V Single-Phase Configuration - Versatile voltage rating suitable for residential and light commercial electrical distribution systems
  • Three-Wire Design - Professional wiring configuration providing efficient power distribution with proper phase and neutral connections
  • Wire Size Compatibility (4) 250-500 kcmil - Accommodates large conductor sizes for high-amperage applications and utility service connections

Weather Protection & Durability

  • NEMA 3R Enclosure Rating - Weather-resistant protection against rain, sleet, and snow for reliable outdoor electrical installations
  • Aluminum Construction - Corrosion-resistant aluminum bus material and enclosure providing long-lasting performance in harsh environments
  • Underground Application Design - Engineered specifically for below-grade installations with proper moisture and environmental protection

Professional Installation & Safety

  • UL Listed Certification - Meets rigorous electrical safety standards ensuring code compliance and professional installation confidence
  • Utility Approved - MI Consumers Energy approval for utility service applications ensuring regulatory compliance
  • Top/Bottom Feed Configuration - Flexible cable entry options accommodating various installation requirements and utility connection methods

Technical Specifications

Amperage Rating: 800A, Voltage Rating: 120/240V, Phase: Single-phase, Number of Wires: 3, Wire Size: (4) 250-500 kcmil, Enclosure: NEMA 3R, Bus Material: Aluminum, Feed Type: Top/bottom, Dimensions: 47.7" H x 20.17" W x 11.19" D, Weight: 100 lb, Certifications: UL Listed, Utility Approvals: MI Consumers Energy, Application: Underground

Installation & Usage

  1. Verify proper underground installation location and ensure adequate clearances per NEC requirements
  2. Prepare underground vault or pad-mount location with proper drainage and access provisions
  3. Install terminal box using appropriate lifting equipment due to 100 lb weight and secure mounting
  4. Connect incoming utility service cables to designated terminals following utility specifications
  5. Install outgoing distribution cables to appropriate terminals maintaining proper phase sequence
  6. Verify all connections are tight and properly torqued per manufacturer specifications
  7. Test installation for proper voltage, phase rotation, and ground continuity before energizing
  8. Complete final inspection and documentation per local electrical codes and utility requirements

Professional Applications

Ideal for:

  • Utility Service Connections - Primary utility service entrance and distribution for residential and commercial developments
  • Underground Distribution Systems - Below-grade electrical distribution networks requiring weather-protected terminal connections
  • Pad-Mount Installations - Ground-level utility equipment installations requiring secure and accessible electrical connections
  • Commercial Service Entrance - Main electrical service connections for commercial buildings and facilities
  • Residential Development Infrastructure - Subdivision and development electrical distribution systems with utility-grade reliability
  • Industrial Power Distribution - Heavy-duty electrical distribution for manufacturing and industrial facilities
  • Municipal Electrical Systems - Public infrastructure electrical distribution requiring utility-approved equipment
  • Emergency Power Systems - Critical electrical distribution applications requiring reliable connection points

Underground Installation Advantage

Specifically engineered for underground applications, this terminal box provides superior protection against environmental conditions while maintaining easy access for maintenance and inspection. The NEMA 3R rating ensures reliable performance in wet locations, while the aluminum construction resists corrosion and provides long-term durability in below-grade installations.

Why Choose Eaton Quality?

With over a century of electrical power management innovation, Eaton delivers the reliability and performance that utility professionals, electrical contractors, and facility managers trust worldwide. This UL Listed terminal box represents Eaton's commitment to electrical safety, regulatory compliance, and dependable power distribution solutions that meet the demanding requirements of professional electrical installations.

Manufacturer Resources

Product Specs

Amperage Rating:
800A
Bus Material:
Aluminum
Catalog Notes:
For (4) 1/0-300 kcmil or (2) 1/0-750 kcmil cables per phase, order 3MTB800BLK. For compression lug Landing kits, order 3MTB1200CLK (includes landings for 3-phases and neutral).
Certifications:
UL Listed
Enclosure:
NEMA 3R
Feed Type:
Top/bottom
Number Of Wires:
3
Phase:
Single-phase
Product Height:
47.7 in
Product Length Depth:
11.19 in
Product Weight:
100 lb
Product Width:
20.17 in
Utility Approvals:
MI : Consumers Energy
Voltage Rating:
120/240 V
Wire Size:
(4) 250-500 kcmil
Product Type:
Main Terminal Box
Product Group:
Electrical
Product Subgroup:
Terminal Box
Department:
Electrical

Eaton 1MTB800R – Frequently Asked Questions

1) What is this Eaton main terminal box designed for?
This 1200A main terminal box serves as a utility pull box for underground electrical services. It provides secure termination and connection points for three-wire single-phase systems rated 120/240V using 2-600 KCMIL conductors.
2) What does the 3R rating mean for outdoor installation?
The 3R rating provides protection against rain, sleet, and ice formation. This enclosure resists weather damage when installed outdoors but is not designed for direct burial or submersion.
3) Can this box handle different conductor sizes?
This unit is specifically designed for 2-600 KCMIL conductors. Using different conductor sizes may require different terminal lugs or connection hardware. Verify compatibility before installation.
4) Why choose aluminum construction over steel?
Aluminum construction offers superior corrosion resistance and lighter weight compared to steel. This makes handling easier during installation while providing long-term durability in outdoor environments.
5) What are the typical mounting requirements?
Mounting requirements depend on local codes and installation conditions. Check the manufacturer's installation template for specific anchor bolt patterns and foundation requirements. Ensure adequate clearances per NEC guidelines.
6) Does this meet NEC requirements for service equipment?
This terminal box is designed to meet NEC requirements for utility service connections. Verify local code compliance and utility company specifications before installation. Some jurisdictions may have additional requirements.
7) What accessories might be needed for installation?
Common accessories include grounding lugs, conduit hubs, weatherproof seals, and mounting hardware. Terminal lugs may need to match your specific conductor requirements. Check with utility requirements for approved components.
8) How do you access the terminals for connections?
Access is typically through removable covers or hinged doors. Follow lockout/tagout procedures during maintenance. Only qualified electricians should perform connections on live 1200A systems.
9) What maintenance does this terminal box require?
Regular maintenance includes checking gasket seals, inspecting for corrosion, and verifying terminal tightness. Clean exterior surfaces and drain weep holes if present. Schedule professional inspection for high-amperage connections.
10) Are there similar Eaton models for different applications?
Eaton offers various terminal box configurations for different amperage ratings and conductor arrangements. Browse our Eaton electrical products for alternative models suited to your specific requirements.
11) What environmental conditions can this box withstand?
The 3R rating and aluminum construction handle normal outdoor conditions including temperature cycling, UV exposure, and precipitation. Extreme coastal or industrial environments may require additional protective measures.
How fast can I get the Eaton 1MTB800R delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Eaton 1MTB800R come with a warranty?
Absolutely. The Eaton 1MTB800R is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Eaton 1MTB800R?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Eaton 1MTB800R from ZenSupply?
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