Eaton 1MTB1600RC Main Terminal Box - NEMA 3R Enclosure
Part Number: 1MTB1600RC
Quick Summary
1MTB1600RC Eaton main terminal box provides a centralized connection for 1600A, single-phase power distribution. Large feeders often struggle with space, secure cable landing, and code compliance; this unit streamlines installation with top/bottom feed and a rugged copper bus. The design is UL Listed, EUSERC-compatible, and housed in a durable NEMA 3R enclosure to withstand challenging environments, while offering robust performance and long-term reliability. For panel builders and integrators, this solution delivers scalable capacity and predictable installation timelines, supporting cost-effective power distribution across industrial and commercial facilities. Secondary benefits include simplified maintenance and easier future expansion within existing electrical rooms and cabinets.
Product Information
Extended Description
1MTB1600RC Eaton: Eaton main terminal box, EUSERC, 1600A, Aluminum, NEMA 3R, Overhead/underground, Three-wire, Single-phase, 120/240V, (6) 250-500 kcmil
Product Name
Eaton main terminal box
Catalog Number
1MTB1600RC
UPC
782114733677
Product Length/Depth
11.4375 in
Product Height
60.125 in
Product Width
32.875 in
Product Weight
350 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.
Certifications
UL Listed
Catalog Notes
Main device must be center fed when installing 800-1200A meter stacks. (4) 750 kcmil cables per phase, order 3MTB1600BLK (one kit per main terminal box)Compression lug Landing kit, order 3MTB1600CLK.
Amperage Rating
1600A
Bus material
Copper
Feed type
Top/bottom
Phase
Single-phase
Voltage rating
120/240 V
Wire size
(6) 250–500 kcmil
Utility approvals
MI : Consumers Energy NC : Dominion VA : Dominion MI : DTE Energy (Detroit Edison) MT : NorthWestern Energy NE : NorthWestern Energy SD : NorthWestern Energy WY : NorthWestern Energy WI : WE Energies / Wisconsin Public Service (WPS)
Enclosure
NEMA 3R
Number of wires
3
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 1MTB1600RC
Feature 1: 1600A amperage rating with copper bus. Business Impact: Handles high-load feeders with minimal voltage drop, reducing the need for parallel devices. Application: Large commercial and light industrial meter stacks where space and efficiency matter. Feature 2: Top/bottom feed configuration. Business Impact: Simplifies wiring routes and reduces install time by providing flexible landing access. Application: Overhead/underground deployments and complex panel layouts. Feature 3: (6) 250–500 kcmil wire size capability. Business Impact: Supports heavy conductor sizes, enabling fewer terminations and lower resistance losses. Application: 3-wire, high-capacity feeders in centralized distribution points. Feature 4: NEMA 3R enclosure. Business Impact: Provides weather resistance and outdoor suitability, lowering protection risk and maintenance. Application: Outdoor or semi-exposed installations in facilities and utility sites. Feature 5: UL Listed and EUSERC-compatible. Business Impact: Ensures regulatory compliance and utility acceptance, accelerating project approvals. Application: Utility-backed projects and regulated markets. Feature 6: Catalog notes and compatibility. Business Impact: Clear integration paths with landing kits and center-fed configurations for 800–1200A stacks. Application: Metering product installations and modular upgrades for future growth. Warranty and support: 1-year policy with standard Eaton terms.
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FAQs
Plan for top or bottom feed, ensure compatible landing kits (e.g., 3MTB1600BLK for main devices) and compression lug options (3MTB1600CLK) per the catalog notes. Confirm space for (6) 250–500 kcmil conductors per phase and a center-fed configuration when installing 800–1200A stacks. Use UL Listed components and observe NEMA 3R clearance for outdoor installations.
The box accommodates (6) 250–500 kcmil cables per phase for a 3-wire, single-phase setup. Copper bus is specified, with top/bottom feed. When landing, consider the appropriate compression lug kits and follow the catalog guidance for landing configurations to maintain proper torque and conductivity.
Yes. The enclosure is rated NEMA 3R, which provides reliable protection for outdoor and semi-exposed installations. It supports overhead/underground feeders and metering stacks, while UL Listed certification helps satisfy utility and safety requirements in diverse environments.
The product is UL Listed and EUSERC-compatible, meeting utility and industry safety standards. These certifications support acceptance by utilities and compliance with electrical codes, facilitating project approvals and ongoing maintenance programs.
Eaton provides a standard warranty per policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. This covers manufacturing defects and ensures access to Eaton’s technical support and replacement parts if needed.