Eaton 3MTB600R Main Terminal Box - UL Listed
Part Number: 3MTB600R
Quick Summary
Eaton 3MTB600R Main Terminal Box enables reliable 600A, four-wire, three-phase metering connections for industrial power distribution. Engineers often face tight spaces, weather exposure, and the need for UL-listed protection in outdoor or rugged environments. UL Listed certification and a NEMA 3R enclosure provide dependable protection against moisture and dust, ideal for overhead or underground metering. With aluminum bus, top and bottom feed, and capacity for (2) 250-500 kcmil conductors, the unit supports flexible, code-compliant layouts. For contractors and maintenance teams, this design translates to faster installations, fewer field revisions, and predictable long-term reliability in commercial and industrial metering projects.
Product Information
Extended Description
3MTB600R Eaton: Eaton Main Terminal Box Group Metering, 600A, Aluminum, NEMA 3R, Overhead/Underground, Four-wire, Three-phase, 120/208V, (2) 250-500 kcmil
Product Name
Eaton main terminal box
Catalog Number
3MTB600R
UPC
786849053093
Product Length/Depth
6.5 in
Product Height
53.9375 in
Product Width
13.5 in
Product Weight
47.5 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
For compression lug landing kits for 600A units, order 3MTB600CLK. Kit includes lug landings for three phases and neutral.
Amperage Rating
600A
Bus material
Aluminum
Feed type
Top/bottom
Phase
Three-phase
Voltage rating
120/208 V
Wire size
(2) 250-500 kcmil
Utility approvals
MI : Consumers Energy NC : Dominion VA : Dominion MI : DTE Energy (Detroit Edison) WI : WE Energies / Wisconsin Public Service (WPS) HI : Hawaiian Electric MT : NorthWestern Energy NE : NorthWestern Energy SD : NorthWestern Energy WY : NorthWestern Energy MD : Baltimore Gas and Electric DC : PEPCO MD : PEPCO
Enclosure
NEMA 3R
Number of wires
4
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MTB600R
600A rating with four-wire, three-phase configuration streamlines metering for high-load facilities. This reduces the number of components and simplifies wiring diagrams, cutting install time and wiring errors. It’s well suited for industrial facilities and large commercial buildings that run 120/208V systems. Aluminum bus material offers light weight with excellent conductivity and corrosion resistance. This translates to easier handling on site and longer service life in harsh environments. Top/bottom feed provides flexible routing and simplifies panel integration, enabling electricians to adapt to varying field layouts and reduce rework. NEMA 3R enclosure plus UL Listed protection ensures weather and dust resistance, minimizing maintenance in outdoor installations. Catalog notes: For compression lug landing kits 3MTB600CLK, lug landings are available to support secure terminations. With dimensions of 6.5 in depth, 53.9375 in height, and 13.5 in width, it fits a range of service-forward metering applications. This combination delivers installation efficiency, safer maintenance, and long-term reliability for overhead and underground metering in commercial and industrial facilities.
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FAQs
The 3MTB600R is designed for overhead and underground metering with 600A capacity and a four-wire, three-phase configuration. It accepts (2) 250-500 kcmil conductors on aluminum bus and offers top or bottom feed to match existing conduit layouts. Integration is streamlined by UL Listed compliance and a standard NEMA 3R enclosure, reducing field modifications and ensuring code-aligned performance in mature or expanding facilities.
Key specs include a 600A amperage rating, aluminum bus material, four-wire configuration, three-phase system, and a voltage rating of 120/208 V. It accommodates (2) 250-500 kcmil conductors and supports top/bottom feed. The enclosure is NEMA 3R and UL Listed, assuring weather resistance and safety in varied installation environments.
Yes. The enclosure is NEMA 3R rated and UL Listed, specifically designed for outdoor or harsh indoor environments. This protection level guards against moisture, dust, and weather exposure while maintaining accessibility for maintenance and service. Its rugged aluminum bus and durable construction support reliable outdoor metering in both overhead and underground applications.
The 3MTB600R carries UL Listed certification and uses a NEMA 3R enclosure, aligning with widely adopted safety and environmental protection standards for outdoor electrical equipment. These certifications help simplify compliance during audits and facilitate installation in utility, commercial, and industrial metering projects.
The 3MTB600R can reduce installation time through top/bottom feed flexibility, robust UL/NEMA-rated protection, and compatibility with lug landing kits (3MTB600CLK). Fewer field revisions and durable construction translate to lower maintenance costs and reduced downtime, delivering measurable ROI for utilities, contractors, and facility managers over the life of the metering system.