Essential Guide to MCC Bucket Components: Unlocking Reliable Motor Control
If you’re working in industrial electrical systems, you’ve likely come across the term MCC bucket, but what exactly does that mean, and what are the key MCC bucket components that make these systems functional? In this guide, we’ll break down the core elements inside a Motor Control Center (MCC) bucket, how they work together, and how ElectriConnection supports contractors and engineers with a wide supply of MCC buckets and replacement electrical parts.
What Is an MCC Bucket?
An MCC bucket is a modular unit housed inside a motor control center (MCC), which is essentially a centralized system used to control some or all electric motors in an industrial facility. These buckets are self-contained units that can be easily removed or replaced and are designed to hold and protect critical electrical components that control a motor or group of motors.
MCC buckets are vital for motor control, safety, and ease of maintenance—allowing facilities to isolate issues, change configurations, or perform service with minimal disruption to operations.
What Are the Core MCC Bucket Components?
Each MCC bucket contains a specific set of components tailored to the type of motor or application it controls. The most common MCC bucket components include:
1. Circuit Breakers or Fuses
These are the primary protective devices inside the bucket. They prevent damage to motors and wiring by interrupting the circuit when a fault occurs. Some buckets may include thermal-magnetic circuit breakers or current-limiting fuses depending on the application.
2. Contactors
A contactor is a switch that turns the motor on or off by opening or closing the electrical circuit. It’s controlled by a lower-voltage signal and is one of the most critical components in the bucket, as it handles the high current required to power motors.
3. Overload Relays
Overload relays protect motors from overheating due to excessive current draw. They work with the contactor to shut down the motor if the current exceeds a preset limit over time, reducing the risk of motor damage or fire.
4. Control Transformers
If the motor control system needs a lower control voltage (typically 120V), a transformer is included to step down the voltage safely. This is essential for operating push buttons, indicator lights, and other control elements.
5. Terminal Blocks and Wiring
All the internal components are interconnected via wiring and terminal blocks, allowing for easy installation and maintenance. Clear labeling and secure connections help reduce downtime during repairs or changes.
6. Auxiliary Devices
Some MCC buckets may include pilot lights, selector switches, timers, or programmable relays. These devices provide additional control and monitoring functionality specific to the motor or process being controlled.
Together, these MCC bucket components form a complete motor control package that is easy to install, service, and customize.
Why MCC Bucket Components Matter
In any industrial or commercial setting, time is money. When a motor fails or needs servicing, having a well-designed and modular MCC bucket means you can swap out the unit without shutting down the entire system. The ability to quickly replace or upgrade individual MCC bucket components helps reduce downtime, improve safety, and extend the life of your electrical system.
That’s why choosing the right bucket, and knowing exactly what components you need, is critical to maintaining efficient operations.
ElectriConnection: Your Trusted Source for MCC Buckets & Components
At ElectriConnection, we understand how vital MCC buckets are to your operations. That’s why we stock a wide range of new, used, and obsolete MCC buckets ready for same-day pickup or fast delivery.
Whether you’re looking for a complete MCC bucket or a single replacement contactor, breaker, or overload relay, we’ve got you covered. And if we don’t have it in stock? No problem. With access to a nationwide network of over 200 suppliers, we’ll source your part quickly and cost-effectively.
With over 80 years of combined industry experience, ElectriConnection is proud to serve everyone from large industrial contractors to independent electricians and facility maintenance teams. Our inventory includes trusted brands and hard-to-find parts alike—backed by a commitment to honest service, technical knowledge, and unbeatable turnaround times.
Need MCC Bucket Components? Contact ElectriConnection Today
Don’t let motor control issues bring your facility to a halt. Call ElectriConnection at (303) 423-4866 or request a quote online. We’ll help you find the right MCC bucket components fast so you can get back to work with confidence.