Legacy MCC Buckets: Why They Still Matter and How to Source Them

Certainly. Based on today’s activity — where you worked on organizing MCC bucket content by manufacturer (e.g., Allen-Bradley, Klockner-Moeller), covered legacy MCC series (like Model 90), and emphasized categorization by model, type, and retrofit availability — here’s a second blog post tailored for your AmpState website:

As facilities modernize, it's easy to assume older equipment becomes obsolete. But in the world of industrial electrical systems, legacy MCC buckets are far from irrelevant. In fact, thousands of facilities across North America still rely on MCC panels installed decades ago. Supporting and sourcing parts for these legacy systems is critical — and cost-effective.

In this post, we’ll explain why legacy MCC buckets still matter, which models are in demand, and how AmpState helps keep your system running with retrofit and replacement solutions.

What Are Legacy MCC Buckets?

Legacy MCC buckets are modular motor control units designed for MCC panels that are no longer manufactured but still in operation. These may include panels from the 1970s to early 2000s from brands like Allen-Bradley, Westinghouse, Klockner-Moeller, Eaton, Siemens, GE, and Square D.

While OEM support may be limited, the infrastructure remains sound — making retrofit or rebuilt MCC buckets a smart investment for system reliability.

Top Legacy MCC Series Still in Demand

Here are some of the most recognized legacy MCC systems still active in the field:

Why Not Replace the Whole MCC Panel?

Replacing an entire MCC panel is costly and disruptive. By retrofitting or sourcing compatible legacy buckets, facilities can:

• Avoid complete system redesigns

• Maintain uptime

• Reduce capital expenditure

• Meet code and operational requirements without major upgrades

How to Identify and Match Legacy Buckets

To match or replace a legacy MCC bucket, collect the following details:

1. Manufacturer and Series (e.g., Allen-Bradley Centerline 2100)

2. Bucket Type – FVNR, FVR, Feeder, VFD, Soft Starter, etc.

3. Dimensions – Measured height (6”, 12”, 18”, etc.)

4. Components – Breakers, contactors, relays, pilot devices

5. MCC Structure Model – Nameplate or door label info

Don’t worry if part numbers are missing. At AmpState, we help identify and cross-reference equivalent models using photos or dimension specs.

Available Retrofit & Replacement Options

We offer:

• Reconditioned MCC buckets ready for installation

• Newly assembled buckets using compatible hardware

• Custom-built retrofit units to match obsolete frames

• Alternative options when OEMs are no longer available

Examples:

• A retrofit Klockner-Moeller Model 90 bucket for a discontinued line

• A new Breaker-Only bucket to replace a failed Feeder unit in a Type W MCC

• Custom Allen-Bradley-compatible VFD bucket built for legacy 2100 frames

Why Work With AmpState

AmpState specializes in both new and legacy MCC bucket solutions. Our team understands the layout and compatibility requirements of every major MCC architecture.

We offer:

• Support for over 10 OEM brands

• Fast sourcing of hard-to-find models

• Retrofit consulting and technical matching

• Worldwide shipping and panel-building services

Need a Replacement for a Legacy MCC Bucket?

Let us know the brand, MCC series, and function — we’ll take care of the rest. Whether it's a hard-to-find Klockner-Moeller Model 90 or a Siemens System 89 retrofit, AmpState can deliver a solution that keeps your system running without downtime.

Request a quote today or reach out to our team with photos or panel info. We're here to help extend the life of your MCC infrastructure.