Eaton BR4242L400F Main Lug Loadcenter - UL 50 UL 67

Part Number: BR4242L400F
Manufacturer
Eaton
Part number
BR4242L400F

Quick Summary

The Eaton BR4242L400F main lug loadcenter is a robust indoor power distribution solution designed for control panels and service entrances. Engineers often face space constraints, wiring complexity, and time-to-market pressures that impact project schedules. This unit carries UL 50 and UL 67 certifications and is available in a NEMA 1 enclosure with flush mounting for tidy, code-compliant installations. With a 400 A rating, 42 circuits, and an aluminum bus, it supports scalable panel design while reducing wiring length and labor. The 10 year limited warranty further reinforces long-term reliability and lowers total cost of ownership for critical electrical infrastructures.

Product Information

Extended Description

BR4242L400F Eaton: Eaton Eaton BR main lug loadcenter,With flush or NEMA type 3R cover, Indoor,400 A,22,Aluminum,Flush,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
BR4242L400F
UPC
786685895444
Product Length/Depth
6.31 in
Product Height
54 in
Product Width
16.22 in
Product Weight
54 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
Flush
Number of circuits
42
Number of spaces
42
Phase
Single-phase
Enclosure
NEMA 1
Interrupt rating
25 kAIC
NEMA rating
NEMA 1
Feature: 400 A main lug with aluminum bus → Business Impact: High current capacity with lighter weight improves handling and reduces support structure load → Application: Industrial control panels and service entries that require robust distribution without heavy copper components. Feature: 42 circuits and 42 spaces → Business Impact: Maximizes panel density and simplifies future expansion without cabinet replacement → Application: Medium-to-large commercial/industrial installations with growing circuit needs. Feature: Flush mounting with NEMA 1 enclosure and cover included → Business Impact: Sleek, space-saving installations that meet indoor code requirements and protect against dust and incidental contact → Application: Indoor electrical rooms, utility closets, and equipment rooms where cleanliness and accessibility matter. Feature: Type BR 1-inch breakers compatibility → Business Impact: Flexible upstream protection and easier spares management, lowering maintenance costs → Application: Systems requiring modular protection and straightforward retrofits. Feature: Certifications UL 50 and UL 67 with 25 kAIC interrupt rating → Business Impact: Compliance with wiring codes and enhanced fault tolerance in demanding environments → Application: Environments demanding rigorous electrical safety and performance standards. Feature: 208Y/120 and 240 V operation; four-wire, single-phase → Business Impact: Broad compatibility with common commercial and light industrial loads, reducing panel variety → Application: Panel assemblies serving mixed lighting, receptacle, and motor loads. Feature: 10 year limited warranty → Business Impact: Predictable depreciation, reduced maintenance surprises, and longer asset life → Application: Mission-critical facilities and OEM projects seeking reliable power distribution.

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FAQs

Yes. BR4242L400F is designed for use with BR 1-inch circuit breakers, enabling straightforward expansion and protection during panel upgrades. Ensure correct labeling and torque specifications per the Eaton BR series installation guide to maintain UL compliance and reliable fault clearing.
This loadcenter is rated for 400 A with a single-phase configuration and accommodates 42 circuits/spaces. It uses aluminum bus, supports 208Y/120 and 240 V, and has an interrupt rating of 25 kAIC. The enclosure is NEMA 1 with a flush mount, and a cover is included for enclosure integrity.
Yes. The NEMA 1 indoor enclosure with flush mounting is ideal for cleanroom-adjacent or machinery control panels in manufacturing environments. UL 50 and UL 67 certifications help ensure compliance with industry standards, while the 42-space footprint accommodates future circuit growth without cabinet replacement.
The BR4242L400F carries UL 50 and UL 67 certifications and comes with a 10 year limited warranty. This combination supports regulatory compliance, long asset life, and reduced maintenance costs across the system’s service life.
Its flush NEMA 1 enclosure, cover included, and 42-space configuration streamline wiring, labeling, and field assembly. Aluminum bus reduces weight, improving handling and installation speed, while the 10-year warranty minimizes downtime and maintenance expenses, delivering favorable return on investment for controlled utility and panel build projects.