Leviton NEMA 1 Indoor Load Center with Main Lugs, 42-Space, 22 kA Interrupt Rating
The Leviton NEMA 1 Indoor Load Center is a main lug distribution panel built for demanding commercial and residential electrical systems. Configured with 42 spaces and a 22 kA interrupt rating, this NEMA 1 enclosure is designed for indoor installations and is supplied as enclosure and interior only. It is available in 225 Amp, 200 Amp, and 125 Amp configurations, giving electricians flexibility to match the panel to the connected load while maintaining Leviton's standard for dependable circuit distribution.
Key Features
- Space Capacity: 42 spaces provide ample room for circuit breaker distribution in larger indoor electrical systems.
- Main Lugs Design: Main lug configuration (no main breaker) allows for flexible feeder and sub-feed arrangements.
- Interrupt Rating: 22 KA short-circuit interrupt rating supports reliable protection under fault conditions.
- Amperage Options: Offered in 225, 200, and 125 Amp configurations to suit varying load requirements.
- Enclosure Rating: NEMA 1 enclosure is intended for indoor, dry-location installations.
- Enclosure and Interior Only: Supplied as the enclosure and interior assembly for the load center.
Certifications & Compliance
- NEMA 1 Indoor Rated Enclosure
Technical Specifications
- Enclosure Rating: NEMA 1
- Connection Type: Main Lugs
- Spaces: 42
- Interrupt Rating: 22 KA
- Amperage Options: 225, 200, 125 Amp
- Configuration: Enclosure and Interior Only
- list_batch: 377-VARMACHINE-20260803
Typical Applications
- Commercial and Industrial Electrical Installations
- Panelboard and Load Center Wiring
- Indoor Electrical Distribution Systems
- Main Lug Feeder and Sub-Feed Applications
- New Construction and Renovation Projects
Why Leviton?
Leviton engineers its load centers for dependable, code-compliant performance in professional electrical installations. With a 22 KA interrupt rating, a 42-space main lug configuration, and a NEMA 1 indoor enclosure, this load center is built to give electricians a flexible, reliable foundation for circuit distribution. Choosing Leviton means specifying equipment designed to support safe, consistent operation across commercial and residential projects.
Manufacturer Resources
Product Specs
- Product Type:
- Load Center
- Connection Type:
- Main Lugs
- Department:
- Electrical
- Product Group:
- Power Distribution
- Short Circuit Current:
- 22 kiloamps
- Warranty Length:
- 10 years
- Product Subgroup:
- Panelboards & Load Centers
- Product Color:
- White
- Voltage Rating:
- 120/240V
Leviton LP422-ML – Frequently Asked Questions
1) Does the Leviton LP212-ML load center come with a main breaker?
No. The Leviton 42-space NEMA 1 load center is a main lug (MLO) panel, so there is no main breaker in the can. Feed it from an upstream overcurrent device, or use it as a sub-feed off a larger panel. Main lug construction is what makes the flexible feeder and sub-feed arrangements possible, but it also means your disconnecting means has to live somewhere else in the system.
2) Can this Leviton 42-space load center be installed outdoors or in a wet location?
Indoor, dry locations only. It is a NEMA 1 enclosure, which is general-purpose indoor protection and offers no rain or sleet protection. For an exterior wall, a meter socket location, or an unprotected mechanical yard, you want a NEMA 3R panel instead. The ABB ReliaHome load center and the ABB TL24415R MLO both come in NEMA 3R enclosures for that situation.
3) Which amperage should I order for a Leviton LP series main lug load center?
Three amperage builds are offered and each is a distinct part number: 125A is LP212-ML, 200A is LP320-ML, and 225A is LP422-ML. Size it to the connected load and the feeder you are pulling, not to the space count, since all three carry the same 42 spaces. The amperage choice is the only option on the order.
4) What is the closest equivalent to the Leviton LP422-ML 225A main lug load center from another manufacturer?
The nearest match in main lug 225A indoor gear is the Square D Homeline 60-space 120-circuit 225A convertible main lugs load center, which is also a NEMA 1 enclosure. Both are main lug (no main breaker) panels rated for indoor dry locations at 225 amps. The differences are branch capacity and breaker family: the Leviton LP422-ML is a 42-space interior taking Leviton breakers, while the Homeline unit is a 60-space, 120-circuit interior taking Homeline breakers, and it is described as convertible, meaning it can be field converted to accept a main breaker. If the panel schedule is built around 42 spaces and Leviton branch breakers, the LP422-ML is the direct fit.
5) I need a main lug panel mounted outdoors on the side of the building - can I use the Leviton 42-space load center?
No. The Leviton LP212-ML, LP320-ML and LP422-ML are NEMA 1 enclosures, which are intended for indoor, dry-location installation only and should not be mounted in an exposed exterior location. For an outdoor main lug application, look at the ABB TL24415R MLO load center, which is a NEMA 3R enclosure rated 150A 3-phase 4-wire at 208Y/120V, or the ABB ReliaHome load center, which uses a NEMA 3R aluminum enclosure with plug-on neutral. Choose between them on service type: the TL24415R is a three-phase 208Y/120V unit, while ReliaHome is the residential-style line.
6) What is the difference between this Leviton main lug panel and a convertible main lug load center like the Square D QO or Homeline?
The Leviton LP panel is a straight main lug design, so it stays a main lug panel. The Square D QO and Homeline convertible main lugs load centers are built so a main breaker can be added later, converting the panel to a main breaker panel in the field. If there is any chance the panel later needs its own disconnect, a convertible unit saves a swap. If it is permanently fed from upstream protection, the Leviton does the job.
7) Can I use this Leviton panel as a sub-panel fed from an existing service?
That is one of its intended uses. Because it is a main lug panel with no integral main, it lands directly on a feeder protected upstream, which is the standard sub-panel arrangement. Terminate the feeder at the main lugs and keep the neutral isolated from the equipment ground on the sub-panel side per code. It is rated for indoor, dry locations only.
8) I need more than 42 circuits in one indoor panel - what are my options?
The Leviton main lug load center tops out at 42 spaces in a NEMA 1 indoor enclosure across its 125A, 200A and 225A configurations. For a higher circuit count in a single indoor main lug can, the Square D Homeline 225A convertible main lugs load center is a 60-space, 120-circuit NEMA 1 panel, so it carries substantially more branch positions at the same 225A main lug rating. The tradeoff is breaker family - the Homeline panel accepts Homeline breakers, so a facility standardized on Leviton branch devices would be splitting its breaker stock.
9) My panel schedule calls for 208Y/120V three-phase distribution - is the Leviton 42-space main lug panel the right choice?
The Leviton 42-space main lug load center is supplied as a NEMA 1 indoor enclosure and interior in 125A, 200A and 225A configurations with a 22 kA short-circuit interrupt rating, and it is a single main lug distribution panel for indoor circuit distribution. If the drawing specifically calls out a 208Y/120V 3-phase 4-wire MLO panel, the ABB TL24415R is the unit written to that service, rated 150A at 208Y/120V 3-phase 4-wire in a NEMA 3R enclosure. Confirm the service voltage and phase against the one-line before ordering either.
10) Does the Leviton load center take plug-on neutral breakers like the Square D QO panel?
The Leviton NEMA 1 42-space main lug load center is supplied as enclosure and interior only and is built around Leviton branch breakers; the plug-on neutral feature is what distinguishes the Square D QO convertible main lugs load center and the ABB ReliaHome load center, both of which are specified as plug-on neutral designs. If your spec requires a plug-on neutral bus for AFCI/GFCI breaker installation, those are the units written that way. If the requirement is simply 42 spaces of indoor main lug distribution at 22 kA, the Leviton panel covers it.
11) Is the ABB ReliaHome load center a substitute for the Leviton 42-space main lug panel?
They are not interchangeable in most specs. The Leviton LP212-ML, LP320-ML and LP422-ML are 42-space main lug panels in a NEMA 1 indoor enclosure carrying a 22 kA interrupt rating. The ABB ReliaHome load center is built in a NEMA 3R aluminum enclosure with plug-on neutral, so its enclosure is rated for outdoor use and its interior is a different breaker platform. Substituting one for the other changes both the mounting location it is listed for and the breakers the job has to buy.
12) Where is the Leviton LP load center manufactured?
These load centers are made in Mexico. That is the stated country of origin on all three amperage builds, which matters for projects carrying domestic-content or origin-documentation requirements on the submittal package.
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Does the Leviton LP422-ML come with a warranty?
Absolutely. The Leviton LP422-ML is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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