Leviton NEMA 1 Indoor Load Cen...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$250.20
Leviton NEMA 1 Indoor Load Center with Main Circuit Breaker, 30-Space, 22 KA

Leviton NEMA 1 Indoor Load Center with Main Circuit Breaker, 30-Space, 22 KA

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Model: LP310-MB

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

$250.20
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Leviton NEMA 1 Indoor Load Center with Main Circuit Breaker, 30-Space, 22 KA

The Leviton NEMA 1 Indoor Load Center with Main Circuit Breaker delivers reliable power distribution for residential and light commercial electrical systems. Rated NEMA 1 for indoor use, this load center features 30 spaces for circuit breakers, a factory-installed main circuit breaker, and a 22 KA interrupt rating for dependable fault protection. It is available in 100A, 125A, 150A, and 200A configurations and is supplied as enclosure and interior only, making it a versatile foundation for new panel installations, service upgrades, and electrical retrofits where a dependable main-breaker load center is required.

Key Features

  • Space Capacity: 30 spaces accommodate multiple branch circuit breakers for flexible load distribution across a residential or light commercial system.
  • Amperage Options: Available in 100A, 125A, 150A, and 200A configurations, allowing the load center to be matched to the required electrical service size.
  • Main Circuit Breaker: A factory-installed main breaker provides a centralized disconnect point and overcurrent protection for the entire load center.
  • Interrupt Rating: A 22 KA short-circuit interrupt rating supports dependable protection against fault currents in the connected system.
  • NEMA 1 Enclosure: The indoor-rated NEMA 1 enclosure is designed for dry, indoor electrical rooms, utility closets, and panel locations.
  • Enclosure and Interior Only: This listing is supplied as enclosure and interior only, giving installers flexibility in specifying and adding branch breakers as required for the job.

Certifications & Compliance

  • NEMA 1 Indoor Rated Enclosure
  • 22 KA Interrupt Rating

Technical Specifications

  • Enclosure Rating: NEMA 1
  • Spaces: 30
  • Interrupt Rating: 22 KA
  • Amperage Options: 100A, 125A, 150A, 200A
  • Configuration: Main Circuit Breaker, Enclosure and Interior Only
  • list_batch: LEV-PREEXIST-20260803

Typical Applications

  • Residential and Light Commercial Electrical Distribution
  • Panelboard and Load Center Wiring
  • Indoor Power Distribution Systems
  • New Construction and Service Upgrades
  • Branch Circuit Protection and Load Management

Why Leviton?

Leviton load centers combine a NEMA 1 indoor enclosure, a factory-installed main circuit breaker, and a 22 KA interrupt rating to deliver dependable, code-compliant power distribution. With 30 spaces and multiple amperage options ranging from 100A to 200A, this load center gives electrical professionals a flexible, reliable foundation for residential and light commercial installations, backed by construction suited for demanding daily use in occupied buildings and service entrances.

Manufacturer Resources

Product Specs

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

Leviton LP310-MB – Frequently Asked Questions

1) Does the Leviton LP310-MB load center come with branch circuit breakers?
No. The Leviton 30-space main breaker load center ships as enclosure and interior only, with the main breaker factory installed. Branch breakers for the 30 spaces are ordered separately, so budget them into the job before you head to the site.
2) Which amperage do I order for a 200 amp residential service upgrade?
For a 200A service you want the LP320-MB. The same 30-space Leviton main breaker load center is also built as LP310-MB at 100A, LP312-MB at 125A, and LP315-MB at 150A, so match the main breaker to the service size the utility and your load calc call for. Space count stays at 30 across all four.
3) Is 22 KA enough interrupt rating for my panel location?
The Leviton LP3-MB series carries a 22 kA short circuit current rating. That covers typical residential and light commercial services fed well downstream of the transformer. Where the available fault current at the panel exceeds 22 kA, most often a short service run off a large pad-mount transformer, this panel is not the right choice and you need a higher AIC panelboard. Get the available fault current figure from the utility before you commit.
4) Can a Leviton LP320-MB load center be mounted outdoors on an exterior wall?
No. The Leviton LP320-MB and the rest of the 30-space main breaker family use a NEMA 1 indoor rated enclosure, intended for dry indoor electrical rooms, utility closets, and panel locations. For an exterior or wet location, the ABB ReliaHome load center uses a NEMA 3R aluminum enclosure with plug-on neutral, and the ABB TL24415R is a NEMA 3R main lugs unit. Choose by location first, then match the amperage and space count.
5) I need a three-phase panel for a 208Y/120V commercial service - will the Leviton 30-space main breaker load center work?
The Leviton 30-space main breaker load center is specified for residential and light commercial single-service distribution and does not carry a three-phase configuration. For a 208Y/120V three-phase four-wire system, the ABB TL24415R is a 150A three-phase four-wire main lugs load center in a NEMA 3R enclosure. Note it is main lugs rather than main breaker, so an upstream disconnect is required.
6) What is a main lugs alternative to the Leviton LP310-MB when the panel is fed from an upstream disconnect?
The Leviton LP310-MB series ships with a factory-installed main circuit breaker, so it is built for service-entrance and centralized-disconnect duty. If the panel is fed downstream of a separate disconnect and no main breaker is wanted in the enclosure, the Square D QO Convertible Main Lugs Load Center is a main lugs only NEMA 1 unit with plug-on neutral, and the Square D Homeline 60-space 120-circuit 225A convertible main lugs load center is another NEMA 1 main lugs option with a higher circuit count. Both are convertible, so a main breaker can be added later rather than being factory fitted.
7) What is the difference between this main breaker panel and a main lugs only load center?
This Leviton panel has a factory-installed main breaker, giving you a single disconnect and overcurrent device for the whole panel, which is what a service entrance panel normally needs. A main lugs only panel like the Square D QO Convertible Main Lugs or the Square D Homeline 225A convertible MLO has no main device; it is fed and protected upstream and is typically used as a subpanel. If this is the service panel, go main breaker.
8) Is 30 spaces enough, or should I go with a larger panel?
Thirty spaces on the Leviton LP3-MB covers a typical single family home or a small tenant space with room left for future circuits. If you are feeding a large house with electric heat, EV charging, and a lot of dedicated circuits, look at a higher space count such as the Square D Homeline 60-space 120-circuit 225A panel. Remember that tandem-capable spaces are a breaker question, not a panel-listing question, so count the physical spaces you need.
9) What should I use instead of the Leviton LP315-MB if I need more than 30 breaker spaces?
The Leviton LP315-MB is part of a 30-space family with 100A, 125A, 150A, and 200A options, all NEMA 1. When the branch circuit count exceeds what 30 spaces allow, the Square D Homeline load center offers 60 spaces and 120 circuits at 225A in a NEMA 1 enclosure. The difference is the feed arrangement: the Homeline unit is convertible main lugs rather than shipping with a main breaker installed.
10) Does the Leviton LP312-MB use a plug-on neutral bus like the Square D QO panel?
The Leviton LP312-MB is a 125A member of the 30-space NEMA 1 main breaker family with a 22 kiloamp short circuit rating, supplied as enclosure and interior only so branch breakers are specified separately. Among the comparable panels, plug-on neutral construction is called out on the Square D QO convertible main lugs load center and on the ABB ReliaHome load center. If the crew is standardizing on plug-on neutral breakers across a property, those two are the ones that state it.
11) For a multi-family service upgrade, how do I choose between the Leviton LP310-MB and the ABB ReliaHome load center?
The decision is the enclosure and the disconnect. The Leviton LP310-MB is a 100A NEMA 1 indoor unit with a factory-installed main breaker and a 22 kiloamp interrupt rating, weighing 31 pounds and shipping as enclosure and interior only. The ABB ReliaHome load center is built in a NEMA 3R aluminum enclosure with plug-on neutral, which suits an exterior meter-adjacent mount. Indoor utility closet or electrical room favors the Leviton; an outdoor wall location calls for the NEMA 3R unit.
12) How heavy is the Leviton 30-space main breaker load center for a one-man install?
It weighs 31 pounds as supplied, enclosure plus interior and main breaker. That is a one-person set on a stud bay or backboard, though holding it plumb while you drive fasteners is easier with a temporary ledger screw or a second set of hands. Adding 30 branch breakers afterward will push the loaded weight up.
13) Where is the Leviton LP3-MB load center made?
Manufactured in Mexico. Worth knowing if your project carries country of origin documentation requirements, which comes up on government and institutional work.
How fast can I get the Leviton LP310-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 LP310-MB come with a warranty?
Absolutely. The Leviton LP310-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 LP310-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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