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.

Largest Selection of Used, Obsolete and Reconditioned Bus Duct

Shop Busway &  Bus Duct

Did you know that EMSCO stocks the largest inventory of reconditioned busway and bus duct in the United States? In fact, we currently have over 25 miles of it in stock and ready to ship. Whether you need a single replacement fitting or an entire plant addition, we have the assortment and selection to keep your facility up and running.

Currently, we have complete coverage in both copper and aluminum bus duct in 3 phase, 3 and 4 wire, and ranging from 100 – 4000 amps in plug-in and feeder style. We pride ourselves on stocking all the major brands including Square D, GE, ITE/Siemens, Cutler-Hammer and Westinghouse. If you’re still running an older, obsolete brand, don’t worry – our line of obsolete brands includes Federal Pacific, Continental, and Arrow Hart. No matter the brand or vintage, ESMCO has it!

Do you need to update or replace your old bus duct? We have the experience and resources to supply all necessary bus duct and bus plugs needed to bring your facility back to working condition. As a refurbished electrical equipment dealer, our buyers may even be interested in purchasing the old busway and bus plugs to help offset the cost of the project.

Please give us a call today at 1-800-328-1842 to discuss your busway and bus duct needs or fill out a form to request a bus duct quote.

Busway and Bus Duct quick specs:

  • 100 amp to 4000 amp busway
  • Plug in and feeder style
  • 3 phase 3 wire or 3 phase 4 wire
  • Internal ground or casing ground
  • Copper or aluminum
  • End tap boxes, center tap boxes, elbows, T’s and assorted fittings
  • Over 25 miles of bus duct in stock
  • All major brands: Square D, General Electric, ITE/ Siemens, Cutler-Hammer and Westinghouse, as well as old obsolete brands Federal pacific, Continental and Arrow Hart.

Updated 2020

An Introduction to Bus Plugs

Shop Bus Plugs

For those of us who are not electricians, the products we sell are often a bit mysterious. What are these things and what do they do? Over the following months, we’ll do our best to give a general overview of each of our main product categories. Today, we’ll start with bus plugs – what they are, how they work, and what they are used for.


To understand the purpose of bus plugs, you have to first understand the difference in the ways buildings are powered. In most residential and commercial settings, power is distributed through hardwiring in the walls of the structure, connecting to all of the various electrical outlets in a room. In industrial settings, it’s not quite that simple.

By design, most industrial structures feature huge open floor plans designed to maximize the total square footage and to allow the freedom of layout for a wide array of uses. Think of a factory for instance. That factory will have various machinery scattered all around the facility, different areas of production and assembly. Since these environments are frequently far from any wall or permanent structure, just how do you get power to all of the machinery?


The answer lies in bus duct and bus plugs. We’ll cover bus duct later, but think of it as a big industrial extension cord. Sections of bus duct are connected together and can be run along the ceiling of the structure to all the areas needing power. But that’s only part of the equation for getting power to where it’s needed.

This is where the bus plug comes in. Bus plugs, as the name suggests are basically giant industrial electrical plugs, much like your standard everyday electrical plug found around the home. Each bus plug would connect to a particular section of busway overheard, and then feed that electricity down to whatever it is below that needs to be powered, from lighting systems to heavy equipment, whatever the case may be.


The great benefit of the busway and bus plug systems is their ease of flexibility. Since there is no physical hard wiring to the building, the entire system can be disconnected and rearranged to accommodate virtually any floor plan. As new equipment comes online or plant layouts shifted, there’s no question about how exactly power is going to be run to the new location.

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 site or give us a call to find the model you need.

Shop Bus Plugs

Updated 2020