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Electrical Load Centers

Load centers, or breaker panels, distribute power across circuits while protecting against overloads and shorts. Load centers manage electrical distribution in residential, commercial, and industrial settings, ensuring electricity is efficiently and safely routed to every corner of the building. Livewire Electrical Supply carries everything from main breakers to main lugs from industry leaders like Square D and Siemens. LiveWire Electrical Supply has the expertise and inventory to meet your needs.

Since 2005, LiveWire Electrical Supply has been providing quality parts and fast shipping for in-stock products—including hard-to-find load centers. Need help finding products? For 24/7 sales assistance, call 1-650-692-0700.

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Frequently Asked Questions

LiveWire Electrical Supply is your trusted source for hard-to-find electrical supplies, offering a wide selection of circuit breakers, fuses, safety switches, and industrial control products—all ready to ship the same day. With real-time stock and price checks, you can easily find what you need at competitive prices, whether for residential, commercial, or industrial projects. Our experts are available to assist with part identification and technical support, while our expedited shipping options and free UPS Ground shipping on qualifying orders ensure fast delivery. For 24/7 assistance and personalized support, call 1-650-692-0700.

What is a load center?

A load center is a device that distributes electricity to different circuits in a building. It has a metal box with circuit breakers that protect each circuit from overloading. A load center can also be called a panelboard, a breaker box, or an electrical panel.

What is a load center vs panelboard?

A load center, commonly known as a breaker box, serves as the central distribution point for electrical power in residential and smaller commercial buildings. It contains circuit breakers or fuses that control and safeguard individual circuits, supplying electricity to various areas and appliances. In contrast, a panelboard is a versatile enclosure found in residential, commercial, and industrial settings, encompassing a broader range of electrical components such as switches, meters, relays, and control devices. Panelboards are used in more complex electrical systems, while load centers are specific to simpler distribution needs in homes and smaller commercial spaces.

Do load centers have a main breaker?

Some load centers have a main breaker, which is a large circuit breaker that controls the power supply to the entire load center and can shut off all the circuits at once. A main breaker also provides overcurrent protection to the load center and its branch circuits. Not all load centers have a main breaker, though. Some load centers have a main lug, which is a terminal that connects the incoming power lines directly to the load center without a circuit breaker. A main lug load center is usually connected to another load center that has a main breaker1

What are the different types of load centers?

A load center can have different types, sizes, and capacities depending on the power supply and the number of circuits it serves. The most common type of load center is a main breaker load center, which has a main breaker that controls the power supply to the entire load center and can shut off all the circuits at once. Another type of load center is a main lug load center, which has no main breaker but connects directly to another load center that has a main breaker.

Shipping and Returns

Easy Returns
You may return items within 30 days of delivery for a refund. Please view our return policy here.

FREE Shipping on orders over $100

We offer one to five-day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s). Please view our shipping policy here.

Same-Day Shipping

We strive to ship out your items within one business day. The shipping process may take up to 5 business days on some occasions. Feel free to contact us if your order is time sensitive. Call 1-650-692-0700 or email sales@livewiresupply.com for help.

Limited Warranty

Warranty Gurantee
LiveWire certifies that every product shipped out of stock, by manufacturers and by fulfillment partners will be free of functional defects for one (1) year. If any part is found with functional defects during the warranty period, LiveWire will send out a replacement item for free. Warranty items must be returned to LiveWire for inspection and must be postmarked within the warranty period.

Contact our support team by emailing support@livewiresupply.com or calling 1-650-692-0700 during normal business hours for help with your warranty claim.

Disclaimer: Livewire Electrical Supply is not affiliated with, authorized by, or acting as a representative for the brands showcased on our platform. Please be aware that products sold by Livewire Electrical Supply do not include the original manufacturer’s warranty. All trademarks, brand names, and logos featured on this website belong to their respective owners. It’s important to note that this website is not endorsed, sanctioned, or approved by any of the manufacturers or trademark holders mentioned.

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LiveWire Electrical Supply PO Box 4221 Burlingame, CA 94011

Normal Business Hours: 7:00am — 5:00pm (Pacific Time)

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