Square D To Supply Massive New Google Data Centers — Leading To Long Lead Times For Customers

We’ve been hearing from some of our customers who have tried to place orders for new stock from Square D that they’ve encountered long lead times (several weeks to months) and have instead turned to EMSCO to quickly get the industrial electrical equipment they need. It turns out the long lead times from Square D are a result of being a supplier for a massive construction project from Google to build up to 11 new data centers, of which Square D has won the contract to provide the electrical infrastructure.

Aside from EMSCO’s massive inventory of industrial electrical equipment, we have the best lead time in the industry. If you are down and need to get up and running ASAP, we’re the place to call! With a major food producer down, EMSCO was able to ship a Square D NW40 main breaker lineup with multiple distribution sections and breakers same day to get them up and running again right away. Not only that, but we also completed a Square D Model-6 Motor Control Center lineup in 2 days after a company was down and couldn’t wait the long lead time for new. That MCC included starter, feeder and VFD buckets.

Whether it’s a single section of busway, a single breaker or bus plug, or a complete lineup, EMSCO has you covered to get you back up and running ASAP! We’re standing by 24 hours for all your after hours emergencies. Simply give us a call anytime (1-800-328-1842) and we’ll be ready to jump into action.

Reconditioned General Electric Spectra Bus Plugs

Looking for GE Spectra bus plugs? Look no further! EMSCO stocks both SB type and SL type plugs in both breaker and fusible styles. Each style has inventory in-stock from 30 amp up to 800 amp.

We have just recently received reconditioned SB366 & SB466 plugs and they’re going to go fast so call today! We also took delivery of new surplus SB466RG; in-stock and ready to ship today!

If interested, simply visit our website or call a salesman today! (1-800-328-1842)

New Shipment of Squre D I-Line Bus Plugs

Now in stock: EMSCO has received a large load of NEW in box Square D I-Line bus plugs. The new inventory includes a wide variety of sizes and plugs will fit both I-Line and I-Line II bus duct. This new inventory compliments our expansive inventory of reconditioned Square D I-Line bus plugs and largest inventory in existence of I-Line bus duct. If you have any questions and would like to speak to a salesman, simply give us a call at 1-800-328-1842.

The full breakdown of new (not reconditioned) bus plugs is as follows:

15 – PQ3610G

15 – PQ4610G

5 – PQ3620G

5 – PQ4620G

5 – PBQ3640G

5 – PBQ4640G

5 – PBQ3660G

A Brief Introduction to Motor Control Centers

It’s been a little while since we’ve written an overview post highlighting one of our main product categories. We’ve covered a few different topics in the past — such as our introduction to bus plugs post — to highlight and provide some general information about the products and lines that EMSCO carries. In this latest post, we’ll be covering the basics of Motor Control Centers.


Motor control centers, at their most basic, contain a series of buckets housed in a larger structure. In industrial and manufacturing settings where electric motors are used, there needs to be a system to control such motors. That is where the motor control center comes in.


Feeder buckets are what power and control the electric motors. Generally, a single bucket controls a single motor. With most industrial processes using many electric motors, multiple buckets will be required to control the system. The structure, simply, is the vertical housing to hold and control all of the feeder buckets in one convenient central location.

The buckets inside the structure come in multiple sizes and configurations. For example, the buckets may either be fused or circuit breakers. The buckets themselves are also fully removable from the structure allowing flexibility for the electric system to adapt to changes in the industrial systems. For example, if additional motors are added or removed, additional buckets can simply be added or removed from the structure or swapped out for the correct components to be installed.


Looking to replace, upgrade, or install a new MCC system? Look no further. We have hundreds of vertical sections of motor control centers ranging from 400 amperes all the way to 3000 amperes, with main or main lug compartments. We have extensive stock in all the major brands including Square D, GE, Allen Bradley and much more. With thousands of buckets in stock in both fusible and breaker styles, from sizes 0-6, single and twin feeder buckets, EMSCO is sure to have what you need!


Since 1948, Electric Motor Supply Co. — EMSCO — is a leading dealer of used and refurbished industrial electrical systems and components. Our extensive inventory, housed in our 250,000 square foot warehouse in Minneapolis, MN, is sure to have the exact part you need. From over 25 miles of bus duct, thousands of bus plugs, to all kinds of transformers, circuit breakers and beyond, our experts will be happy to work with you with any of your electrical requirements.

Medium Voltage Switchgear

EMSCO completes its latest medium voltage switchgear project. The latest project is an S&C 15KV line-up that includes a main lug only compartment and (5) 600amp fusible feeder switches.

EMSCO can handle all your medium voltage needs in a timely matter.

Contact us today.

An Introduction to Bus Plugs

For those who are not electricians, industrial electrical products can seem mysterious. Today, we'll explain what bus plugs are, how they work, and what they are used for. To understand the purpose of bus plugs, you first need to understand how power is distributed in industrial settings.


In most residential and commercial settings, power is distributed through hardwiring in the walls. In industrial settings, however, the large open floor plans make it difficult to distribute power in this way. That's where bus duct and bus plugs come in.

In industrial settings, bus duct is often used to distribute power to various areas of a facility. Bus duct [also known as busway] is essentially metal enclosures that contain conductors for distributing electricity and generally come in 10-foot sections that connect to one another to create the exact length necessary for a run. They can be installed overhead or under the floor, and they're designed to be flexible, so they can be easily repositioned or rearranged as needed.

However, just having bus duct isn't enough to distribute power to all the equipment in a facility. That's where bus plugs come in.


Bus plugs are essentially large industrial electrical plugs that connect to a section of bus duct overhead and then feed electricity down to the equipment below.

Bus plugs typically come in a variety of sizes and styles to fit different types of bus duct and equipment. They're designed to be easy to install and remove, so they can be quickly repositioned or replaced if needed.


One of the benefits of using bus plugs is that they allow for greater flexibility in terms of the layout of a facility. Because the bus duct and bus plugs can be easily repositioned, it's possible to change the layout of a facility without having to rewire the entire electrical system. This can save a lot of time and money in the long run.

Another benefit of using bus plugs is that they provide a higher level of safety compared to traditional hardwiring. With hardwiring, it's possible for a fault to occur in the wiring, which can lead to electrical fires or other hazards. With bus duct and bus plugs, the conductors are contained within metal enclosures and the bus plugs are equipped with either fuses or circuit breakers, which provide an extra layer of protection against faults and other issues.

Overall, bus plugs are an important component of industrial power distribution systems, allowing for greater flexibility and safety compared to traditional hardwiring.

We hope this has served to give a basic understanding of what exactly a bus plus is, how it works, and why it is used. If you’re looking for replacement bus plugs for your system, look no further! EMSCO stocks the largest selection of used and reconditioned bus plugs from all the major manufacturers (GE, Square D, and more) and from all vintages, from obsolete to modern systems. Simply browse our store or give us a call to find the model you need.

Shop Bus Plugs

Updated 2023