NM632400 - 400Amp Circuit Breaker

NM632400 - 400Amp Circuit Breaker

The NM632400 is a 400-amp, 3-pole Type NM molded-case circuit breaker made for compatible electrical distribution equipment. It uses a bolt-on mounting configuration and thermal-magnetic trip design, with load-side lug terminals included. The breaker is rated 22 kA at 600 VAC, 30 kA at 480 VAC, and 42 kA at 240 VAC. It measures 15.5 inches high, 8.19 inches wide, and 4.13 inches deep, and carries a 40°C rating. This breaker is a good fit for maintenance and replacement work where an existing system calls for the NM632400 or a breaker with the same approved form, fit, and electrical characteristics. That's especially important with legacy equipment. A breaker may have the right amperage but still be wrong for the application because of its mounting, dimensions, pole configuration, terminals, or interrupting rating. If you're replacing an existing unit, compare all of those details before installation. With its molded-case construction and straightforward Type NM design, the NM632400 is built to last when properly applied, installed, and maintained.

Key Features and Benefits

• 400A, 3-pole configuration for compatible electrical distribution systems.
• Thermal-magnetic trip design provides overcurrent protection according to the breaker's specified ratings.
• Bolt-on mounting matches equipment designed for this Type NM configuration.
• 22kA A.I.C. at 600VAC, 30kA at 480VAC, and 42kA at 240VAC.
• Load-side lug terminals are included, an important detail when matching an existing installation.
• 40°C rated for applications requiring this temperature rating.
• Molded case construction provides a durable, practical design that's built to last.
• Well-suited to legacy equipment maintenance and replacement when the NM632400 specifications match the existing system.

Technical Specifications

• Part Number: NM632400
  
• Type: NM
  
• Product: Molded Case Circuit Breaker
  
• Amperage: 400A
  
• Poles: 3
  
• Trip Type: Thermal Magnetic
  
• Mounting: Bolt-On
  
• A.I.C. Rating: 22kA @ 600VAC
  
• A.I.C. Rating: 30kA @ 480VAC
  
• A.I.C. Rating: 42kA @ 240VAC
  
• Temperature Rating: 40°C
  
• Height: 15.5 in.
  
• Width: 8.19 in.
  
• Depth: 4.13 in.
  
• Ship Weight: 38.00 lbs.
  
• Terminals: Load-Side Lug Terminals Included
  

Material Compliance and Certifications

• The available specifications do not include specific material compliance and certification information for the NM632400. If your facility, project, or local code requires a particular certification, listing, or material-compliance standard, check the product labeling and applicable manufacturer documentation before installation.
• Breaker selection and installation should also follow applicable electrical codes, equipment requirements, and requirements established by the authority having jurisdiction.

Where It Works Best

• The NM632400 400A circuit breaker is intended for compatible equipment requiring a 3-pole, bolt-on Type NM molded case breaker with the electrical and physical characteristics listed above. It is particularly useful in legacy electrical systems where the goal is to maintain the existing equipment configuration.
• When you're matching a replacement breaker, don't stop at the 400 amp rating. Check the details that matter: three poles, Type NM construction, bolt-on mounting, dimensions, terminal configuration, system voltage, and A.I.C. rating. The replacement must suit the specific equipment it will be installed in.
• For applications that require the NM632400's form, fit, and ratings, this breaker provides the familiar configuration needed to maintain the existing electrical system without changing its intended setup.