Eaton BR4242L400S Main Lug Loadcenter - NEMA 1
Part Number: BR4242L400S
Quick Summary
The Eaton BR4242L400S is a main lug loadcenter for indoor electrical distribution in commercial and industrial panels. Facility engineers often face space constraints and code complexity when expanding distribution, and this unit delivers high-density capability with 42 circuits. It carries UL 50 and UL 67 certifications, a NEMA 1 enclosure rating, and a 10-year limited warranty for long-term reliability. Compatible with BR-series 1-inch breakers and surface mounting, its aluminum bus and 42-space layout support scalable, cost-effective installations.
Product Information
Extended Description
BR4242L400S Eaton: Eaton Eaton BR main lug loadcenter,With surface cover, Indoor, 400 A,22,Aluminum,Surface,NEMA 1,42 Circuits,42 Spaces,Four-wire,Three-phase,Type BR 1-inch breakers,208Y/120,240V,(1) 250–750 kcmil or (2) #3/0–250 kcmil
Product Name
Eaton BR main lug loadcenter
Catalog Number
BR4242L400S
UPC
786685895437
Product Length/Depth
6.31 in
Product Height
54 in
Product Width
16.22 in
Product Weight
67 lb
Warranty
10 year limited
Certifications
UL 50 UL 67
Type
Main lug
Amperage Rating
400 A
Bus material
Aluminum
Cover
Cover included
Main circuit breaker
MLO
Mounting
Surface
Number of circuits
42
Number of spaces
42
Phase
Single-phase
Enclosure
NEMA 1
Interrupt rating
25 kAIC
NEMA rating
NEMA 1
Residential and Light Commercial, Load centers and Circuit Breakers, Volume 1 Tab 1
Eaton Specification Sheet - BR4242L400S
Eaton type BR circuit breaker limited warranty June 2024
Feature: Main lug configuration with 42 circuits and 42 spaces. Business Impact: Maximizes space efficiency and reduces enclosure count, lowering installation time and cost. Application: Ideal for indoor commercial and light-industrial panels where future expansion is anticipated. Feature: Aluminum bus construction. Business Impact: Improves conductivity and durability under high-load conditions, reducing maintenance intervals. Application: Suitable for 400 A feeders and continuous operation in busy distribution rooms. Feature: Surface mounting design. Business Impact: Eases retrofit and new-install commissioning by simplifying mounting and service access. Application: Well-suited for retrofit projects in existing facilities where wall space is a premium. Feature: 400 A rating with 25 kAIC interrupt capability. Business Impact: Delivers robust protection for mid-sized loads while meeting typical code requirements for commercial spaces. Application: Serves as a reliable distribution spine in manufacturing areas and data centers with moderate fault-current demands. Feature: Certifications and enclosure. Business Impact: UL 50/UL 67 compliance and NEMA 1 protection ensure regulatory alignment and long-term reliability. Application: Supports regulated environments and facilities seeking durable, code-compliant panels with extended warranties. Feature: BR-series 1-inch breaker compatibility. Business Impact: Enables seamless future expansion and component standardization, reducing spare-part variety. Application: Suitable for scalable control panels and distribution centers in industrial settings.
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FAQs
The BR4242L400S is ideal for indoor distribution in commercial and light-industrial environments where space is at a premium. It supports a high-density 42-slot layout, is surface-mountable, and uses an aluminum bus for durability. It pairs well with BR-series 1-inch breakers for scalable, code-compliant control panels and service centers.
With a 400 A rating and 25 kAIC interrupt capability, this loadcenter provides robust feeder protection for mid-sized downstream circuits. Its aluminum bus ensures efficient current carrying capacity, while the 42-space design supports expansion without needing additional enclosures, reducing total cost of ownership over the panel’s life cycle.
Yes. The BR4242L400S carries UL 50 and UL 67 certifications and uses a NEMA 1 enclosure, aligning with common electrical codes for indoor installations. These certifications, along with a 10-year warranty, provide regulatory confidence and long-term reliability in manufacturing floors, data centers, and commercial spaces.
The enclosure is designed to be compatible with BR-series 1-inch breakers. This compatibility supports standardized replacement parts and straightforward future expansions, helping maintain consistent performance while simplifying maintenance and stocking decisions for procurement teams.
Eaton backs the BR4242L400S with a 10-year limited warranty, underscoring reliability for long-term installations. Routine maintenance includes inspection of connections, bus bar integrity, and cover seals. The UL certifications and documented specifications support predictable service life and streamlined support from Eaton’s technical resources.