Leviton NEMA 1 Indoor Load Cen...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4.18
Leviton NEMA 1 Indoor Load Center with Main Circuit Breaker, 42-Space, 22 KA

Leviton NEMA 1 Indoor Load Center with Main Circuit Breaker, 42-Space, 22 KA

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Model: LP420-MB

In Stock (leaves warehouse same day if ordered before 3pm ET)

$4.18
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Leviton NEMA 1 Indoor Load Center with Main Circuit Breaker, 42-Space, 22 KA

The Leviton Indoor Load Center is a NEMA 1 rated panel built for reliable indoor electrical distribution, featuring a main circuit breaker, 42 spaces for branch circuit breakers, and a 22 KA interrupt rating for demanding fault-current conditions. This unit is sold as the enclosure and interior only, giving installers a flexible foundation for residential and light commercial service panels. The main breaker is available in 150A, 200A, or 225A configurations, allowing this load center to be matched to the amperage requirements of the specific installation, whether it is a new service entrance or a panel upgrade. With 42 available spaces, this load center provides ample room for branch circuit breakers serving lighting, receptacle, and appliance circuits throughout a home or light commercial building.

Key Features

  • 42 Spaces: Generous space count for branch circuit breakers, supporting larger residential or light commercial loads.
  • Main Circuit Breaker: Factory-configured with a main breaker available in 150A, 200A, or 225A, matching the load center to the required service amperage.
  • 22 KA Interrupt Rating: Withstands high fault currents, adding a layer of protection and code-compliant performance to the electrical system.
  • NEMA 1 Enclosure: Rated for general-purpose indoor use, protecting the interior components from incidental contact and light dust.
  • Enclosure and Interior Only: Supplied as the load center enclosure with interior, letting contractors pair it with the appropriate main breaker configuration for the job.
  • Flexible Amperage Options: Choose from 150A, 200A, or 225A main breaker ratings to right-size the load center for the connected electrical service.

Certifications & Compliance

  • NEMA 1 Indoor Enclosure Rating

Technical Specifications

  • Spaces: 42
  • Interrupt Rating: 22 KA
  • Enclosure Rating: NEMA 1
  • Main Breaker Amperage Options: 150A, 200A, 225A
  • Configuration: Enclosure and Interior Only
  • list_batch: LEV-PREEXIST-20260803

Typical Applications

  • Residential Service Panels and Subpanels
  • Light Commercial Electrical Distribution
  • Indoor Panelboard and Load Center Installations
  • New Construction Electrical Rough-In
  • Service Panel Upgrades and Renovations
  • Main Breaker Panel Replacements

Why Leviton?

Leviton engineers this indoor load center with a NEMA 1 enclosure and a 22 KA interrupt rating to deliver dependable, code-compliant performance for main-breaker electrical distribution. With 42 spaces and main breaker options across 150A, 200A, and 225A, it gives electrical professionals a dependable platform for sizing service entrance and subpanel installations correctly, backed by the quality and consistency electrical contractors expect from Leviton.

Manufacturer Resources

Product Specs

Product Type:
Load Center
Listing:
NEMA 1
Department:
Electrical
Product Group:
Wiring Devices
Short Circuit Current:
22 kiloamps
Product Weight:
36 pounds
Country of Origin:
Mexico
Warranty Length:
10 years
Product Subgroup:
Combination Devices

Leviton LP420-MB – Frequently Asked Questions

1) Does the Leviton LP415-MB load center come with the branch circuit breakers?
No. The Leviton 42-space main breaker load center ships as enclosure and interior only, with the main breaker factory-configured at 150A, 200A, or 225A depending on which one you order. Every branch breaker filling those 42 spaces is a separate line item, so budget the breaker schedule on top of the panel. Order the main amperage that matches the service: LP415-MB for 150A, LP420-MB for 200A, LP422-MB for 225A.
2) Which amperage should I order for a 200 amp service upgrade?
LP420-MB is the 200A main breaker version, and 200A is the standard residential service upgrade size. LP415-MB is 150A for a lighter service or a large subpanel, and LP422-MB is 225A where the load calculation runs past 200. The amperage is factory set by the main breaker, so it is not something you change later in the field. Size it off the load calculation, not off the existing panel's label.
3) Can the Leviton 42-space load center be installed outdoors on an exterior wall?
No. It carries a NEMA 1 enclosure rating, which is general purpose indoor use, protecting the interior from incidental contact and light dust but not from rain or weather. For an exterior wall or any wet location, the ABB ReliaHome load center uses a NEMA 3R aluminum enclosure with a plug-on neutral interior, and the ABB TL24415R is also NEMA 3R. Pick the NEMA 3R can for outdoor meter-main and service entrance work and reserve the Leviton for indoor panel rooms, garages, and utility closets.
4) What is the difference between the Leviton 42-space load center and the Square D Homeline 60-space main lugs load center?
Two differences decide it. The Leviton NEMA 1 indoor load center is supplied with a main circuit breaker, factory configured at 150A, 200A, or 225A, while the Square D Homeline 60-space 120-circuit 225A unit is a convertible main lugs load center, which means it is fed from an upstream overcurrent device rather than carrying its own main. The second is capacity: 42 spaces on the Leviton against 60 spaces and 120 circuits on the Homeline. Both are NEMA 1 enclosures for general purpose indoor use. If the panel is the service entrance and needs the service disconnect in the can, the main breaker configuration is the one that fits; if it is a subpanel fed from a breaker in the main panel, main lugs suits.
5) What load center should I use for a 3-phase 208Y/120V service instead of the Leviton 42-space panel?
The ABB TL24415R is the 3-phase option: it is a main lugs only load center rated 150A, 3-phase 4-wire 208Y/120V in a NEMA 3R enclosure. The Leviton 42-space unit is a main breaker load center for residential and light commercial service panels and subpanels with main breaker amperages of 150A, 200A, or 225A. On a 208Y/120V wye service feeding a commercial tenant space, the 3-phase 4-wire interior is what lands the conductors; a panel built for single phase distribution will not take that feed.
6) Is 42 spaces enough, or should I go bigger on a large house?
42 spaces is the largest common residential and light commercial count, and it carries a full lighting, receptacle, and appliance schedule with room left for AFCI and GFCI breakers, which eat spaces fast. Where it runs short is a house with heavy sub-metered loads, an EV charger plus solar backfeed, or a small commercial tenant fit-out with many small circuits. If you expect to exceed it, the Square D Homeline 60-space 120-circuit 225A load center is the larger NEMA 1 step up, though it is main lugs rather than main breaker.
7) Can I use this Leviton load center as a subpanel instead of the main service panel?
Yes. A main breaker panel works fine as a subpanel, and the main breaker simply becomes a local disconnect at that panel, which is convenient for a detached garage, a shop, or a floor subpanel. The one thing that changes is grounding: in a subpanel the neutral and ground bars must stay separated, unlike the service entrance where they are bonded. At 150A, 200A, or 225A, the feeder breaker upstream sets the real limit.
8) Is the Square D QO convertible main lugs load center a direct replacement for the Leviton 42-space main breaker panel?
Not a direct swap. The Square D QO load center is a convertible main lugs unit with a plug-on neutral interior in a NEMA 1 enclosure, so it arrives without a main breaker; the Leviton 42-space panel ships as enclosure and interior with a main circuit breaker in 150A, 200A, or 225A. Both are indoor NEMA 1. They also take different branch breakers, QO on the Square D side against Leviton breakers on the other, so a panel change means changing every branch breaker in the can, not just the enclosure.
9) Which load centers use a plug-on neutral interior?
Among the comparable panels, the Square D QO convertible main lugs load center and the ABB ReliaHome load center are the plug-on neutral designs. Plug-on neutral matters when the job is loaded with AFCI and GFCI breakers, because the neutral connects through the bus when the breaker snaps on instead of through a pigtail to the neutral bar, which keeps the gutter clear on a 42-circuit-class panel full of combination breakers. The Leviton 42-space unit is a main breaker load center supplied as enclosure and interior, rated NEMA 1 with a 22 kiloamp short circuit current rating.
10) I need a 225A panel with more than 42 spaces. What are my options?
The Square D Homeline load center is the higher-count 225A option at 60 spaces and 120 circuits in a NEMA 1 enclosure, though it is a convertible main lugs unit rather than a main breaker panel. The Leviton NEMA 1 load center reaches 225A as well, as one of three main breaker configurations alongside 150A and 200A, with 42 spaces for branch breakers serving lighting, receptacle, and appliance circuits. If the space count is the binding constraint and a separate service disconnect is already in place upstream, the 60-space main lugs panel gives the room; if the 225A device has to be inside the panel, the main breaker configuration is the one that does that.
11) How heavy is the Leviton 42-space load center, and is it a one-man set?
36 pounds for the enclosure and interior. That is a manageable one-person lift onto a wall, but awkward enough on a ladder or in a tight utility closet that a second set of hands on the layout marks saves rework. Note that is the bare panel weight, before any branch breakers go in.
12) Where is the Leviton LP422-MB load center made?
Mexico is the country of origin on the Leviton 42-space main breaker load center, across all three amperage versions. That matters on public and institutional work where a domestic-content or trade-agreement requirement sits in the spec, so check it against the procurement language before submitting.
How fast can I get the Leviton LP420-MB delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Leviton LP420-MB come with a warranty?
Absolutely. The Leviton LP420-MB is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Leviton LP420-MB?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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