Eaton 3MTB2000RC Main Terminal Box - UL Listed
Part Number: 3MTB2000RC
Quick Summary
Eaton main terminal box provides a high-capacity connection point for three-phase power in industrial facilities. Engineers often face challenges delivering reliable, easy-to-service feeders within tight spaces and demanding environments. UL Listed certification and a durable NEMA 3R enclosure ensure safety and weather resistance across indoor and outdoor installations. This unit leverages a copper bus and top/bottom feed to support up to 2000A, delivering flexible, scalable distribution while minimizing downtime. By combining robust ratings with practical installation benefits, it delivers real business value for electrical distribution teams, procurement professionals, and field service engineers seeking high-performance, compliant infrastructure.
Product Information
Extended Description
3MTB2000RC Eaton: Eaton main terminal box, 2000A, Copper, NEMA 3R, Overhead/underground, Four-Wire, Three-phase, 120/208V, (8) 750 kcmil
Product Name
Eaton main terminal box
Catalog Number
3MTB2000RC
UPC
786689015237
Product Length/Depth
17.39 in
Product Height
60.58 in
Product Width
32.88 in
Product Weight
250 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
Amperage Rating
2000A
Bus material
Copper
Feed type
Top/bottom
Phase
Three-phase
Voltage rating
120/208 V
Wire size
(8) 1/0–750 kcmil or (16) 1/0–300 kcmil
Enclosure
NEMA 3R
Number of wires
4
Feature: 2000A amperage rating with copper bus material. Business Impact: Enables large feeders and minimizes the number of terminations, reducing potential fault points and improving overall distribution efficiency. Application: Ideal for heavy-duty industrial power distribution in manufacturing and processing facilities. Feature: Top/bottom feed configuration. Business Impact: Flexible wiring options reduce installation time and allow easier retrofits in existing cabinets or switchgear layouts. Application: Suitable for retrofit projects and new builds requiring adaptable feeder ingress. Feature: NEMA 3R enclosure. Business Impact: Provides weather and corrosion resistance for both indoor and outdoor environments, lowering maintenance costs and extending service life. Application: Outdoor substations, loading docks, and exposed electrical rooms. Feature: Four-wire, three-phase design with 120/208 V rating. Business Impact: Supports reliable power distribution with balanced load capability and reduced harmonic stress, improving equipment longevity. Application: Commercial and industrial facilities with mixed loads and urgent uptime targets. Feature: Flexible conductor sizing ((8) 750 kcmil or (16) 1/0–300 kcmil). Business Impact: Reduces SKU fragmentation and simplifies procurement while supporting large-diameter feeders. Application: Heavy feeder installations and long-distance power runs. Feature: UL Listed certification and warranty framework. Business Impact: Ensures compliance and post-sale support, reducing procurement risk and guaranteeing performance for project handovers. Application: Regulatory-compliant installations and regulated environments in plant operations.
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FAQs
The 3MTB2000RC supports top and bottom feed configurations, enabling flexible routing of feeders in both new builds and retrofit projects. It accepts large conductor sizes—up to eight 750 kcmil or sixteen 1/0–300 kcmil cables—facilitating straightforward integration with existing switchgear and service entrance gear. This reduces field time and minimizes rework, delivering faster commissioning and confident installations for plant engineers.
Key specs include a 2000A amperage rating, copper bus material for low voltage drop, three-phase power, and a 120/208 V voltage rating. The enclosure is NEMA 3R, suitable for indoor or outdoor use. The unit handles (8) 750 kcmil or (16) 1/0–300 kcmil conductors with four wires total, supporting large-scale feeders in commercial and industrial environments.
Yes. With a rugged NEMA 3R enclosure and copper bus construction, the 3MTB2000RC is well-suited for overhead and underground feeder applications. Its top/bottom feed design plus high current capacity enables reliable power distribution in factories, processing plants, and utility-adjacent facilities, while minimizing weather-related maintenance and downtime.
The 3MTB2000RC is UL Listed, ensuring compliance with recognized electrical safety standards and reliability in mission-critical environments. The NEMA 3R enclosure rating further guarantees protection against weather and corrosion for outdoor installations. Together, these certifications support safer installations, smoother inspections, and longer service life in regulated industrial settings.
Maintenance considerations include routine inspection of connections, enclosure integrity, and copper bus condition to prevent oxidation or loosening of terminations. The product’s durable construction, UL Listed certification, and 25-000 warranty framework help reduce lifecycle costs by lowering downtime and replacement frequency. For ROI, expect lower maintenance labor, fewer spare parts, and extended service intervals in high-load power distribution.