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The History of Kwh Metering & Leviton Submeters Today
By: Ken Freemen (SubMeter Product Specialist)


A defining achievement for our world has been the ability to generate large amounts of electricity and transmit that power over long distances; an achievement that was not and is not without cost.
Cost? Yes, cost! And cost has always been paid for with the ability to measure electricity as its being consumed. Is it a stretch to wonder if we would have been enjoying what electricity means to our very lives if there had never been a way to measure the cost of producing it?
Ahhh, the kwh meter! It’s the method whereby consumption of electricity has, and always will be measured. The kwh meter uses current transformers to detect how much electricity is passing through the meter; aka, being consumed. This applies to whomever and whatever is using the electricity.

The utility generates the electricity and sends it over wires to any given point for consumption. Simple.

And based upon how much the meter measures as having been consumed, a bill is generated. Ahh, the monthly electric bill!

How does sub-metering enter the picture? First, keep this in mind: A meter is a meter is a meter! The only difference between a sub-meter and a ‘meter’ that’s mounted on residences and businesses by the utility is……. ‘Who owns the meter’?

Enter the ‘Sub-meter’
A sub-meter is a meter that measures consumption of electricity ‘inside’ of the utility meter and can be installed to measure any given point whether that be the panel serving a tenant or even individual circuits within an electrical panel. The owner of the sub-meter can use the consumption information recorded by the meter to recover costs or to make decisions that may reduce consumption at that point.

Why the Need for Sub-metering?
Although it’s always been possible to meter consumption ‘inside’ the utility meter, the desire and the need to sub-meter began to grow in the early 1980’s and is directly related to dramatically rising utility costs. With a rise in costs, the need for ‘accountability’ grew with it, to identify who………or what was using the electricity and when necessary to recover those costs.
If a meter is a meter is a meter, why aren’t the meters on the side of the building used for sub-metering purposes? Quite simply, the design of the typical utility meter doesn’t lend itself to be efficiently and effectively used for ‘sub-metering’ purposes. Which begs the question, ‘What makes a sub-meter different?’

Current Transformers Make the Difference
Utility type meters utilize internal current transformers which inhibits its use beyond that of metering at the service entrance to a building.
Sub-meters utilize external current transformers which means that the current transformers can be installed at any given point and the meter itself can be mounted in a remote location.

Leviton Acquires Integrated Metering Systems
Delivers revenue grade energy management metering and supports the LEED Certification process

November 30, 2010, Leviton Manufacturing Company, the leader in electrical wiring devices and lighting energy management systems, today announced the acquisition of Integrated Metering Systems, a leading manufacturer of revenue-grade sub-metering products. Combined with Leviton’s worldwide distribution and sales channels, we can now offer solutions that meet all requirements for measurement and verification issues such as smart metering, load management and LEED rating achievement.

About IMS
Founded in 1989, IMS has been a pioneer in the manufacture of sub-metering systems that quantify energy usage for a multitude of applications, such as tenant billing, energy management, solar PV production, cost accounting and a wide array of other applications to control and manage energy usage and costs. IMS meters meet the additional needs of the marketplace by being small in size and can be offered in larger cabinets housing as many as 19 meters.

2015 Going Forward
Today, not only does Leviton’s Metering Solutions provide the marketplace with the most basic needs for monitoring electrical consumption but also products and Automatic Meter Reading capabilities that answer the most stringent requirements for data acquisition and analysis. And, while using an open protocol, Leviton’s metering products interface to all known Building Automation Systems with ease.

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Vynckier Enclosure Systems broadens their JIC enclosure line to include the “extra depth” VJ2016, offering the industry’s deepest base.

The VJ2016 comes with 10.72” of usable depth, exceeding all of the standard or raised depth versions presently available in the market place of a 20×16 JIC enclosure.

A .197” wall thickness enhances the structural integrity of the enclosure wall, providing end users with the ability to house large, heavy components in the VJ2016.

The VJ2016 cover is mounted to the base using thru-holes and stainless steel hardware ensures corrosion resistance as well as the added strength.

  • Keeping true to the quality of Vynckier’s VJ line, the new 20×16 enclosure includes the following features:
    Full width mounting flange with added gusset strengtheners providing maximum static load capacity
    Outdoor life exceeding 20 years (an additional 10 years if UV coated)
    Optional cover printing for display of custom artwork (ie. company logo, product name, etc.)
    Corner ribs on cover for added protection against cracks if dropped
    Molded gasket channel housing memory retaining, poured, polyurethane gasket
    Made in the USA

For more information or to find your local representative,
please visit our website at or call us directly at 1-888-837-1114

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For over 50 years, the Joslyn® brand has been recognized as the leading name in power, signal, and communications protection. Since gaining recognition as the first global supplier of aircraft lightning arresters, Joslyn has become a global leader in providing innovative technology, design, manufacturing, and distribution of surge protection products. More than 1300 standard product configurations are available through just our extensive AC Surge protector line. Joslyn AC devices include products for facility wide installation, prewired units for equipment-level protection and custom-tailored solutions for OEMs. Joslyn®

According to Frost & Sullivan’s November 2014 “Analysis of the U.S. DIN-Rail Surge Protection Device Market” report, it is estimated that the U.S. hardwired SPD Market Revenue Forecast for 2015 is $315 million, of which LPED surge protective devices represent a modest 3.6% market share. Our existing surge protection business has spanned multiple vertical market segments to include education, healthcare, industrial, and commercial applications and has the potential for exponential growth with your assistance.

Each year new sections are added to the National Electric Code expanding the use of where surge protection must be used. Requirements now include Critical Operations Power Systems, emergency switchboards or panelboards, and wind renewable energy sources. This ever growing requirement for surge protection further validates the benefits of protecting a facility through the proper installation of surge protective devices.

Please take some time to review the available tools within our iPad apps, LP Mobile and T&B Mobile, as well as the website at: Also, please plan to visit us in the Connect space at Automation Power World.

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Pre-Cut Superstrut® By Thomas & Betts

No Cutting. No Waste. No Downtime.

Thomas & Betts’ Pre-Cut Superstrut® Solutions is an innovative program offered to contractors who are focused on “Total Project Cost Reduction.” T&B introduces the Pre-Cut Superstrut® program as a new addition to our value added portfolio of product service solutions to help customers gain savings in areas such as: Labor & Materials, Safety, Storage and Logistics. Our goal is to provide end users with tailored strut solutions to fit their project needs!

Best regards,

Ricardo Portillo
Product Manager – Metal Framing

Gary Moses
Associate Product Manager – Metal Framing