1045 Hickory Street Pewaukee, WI 53072 Phone: (262) 691-8241 Fax: (262) 691-9330 www.cooperpower.com News Release Contact: Stephen Weinstein (262) 691-8241 stephen.weinstein@cooperindustries.com Cooper Power Systems Installs First Triplex Indoor Power Center New technology meets the needs of previously challenging indoor installations. Waukesha, WI, September 27, 2010 – Cooper Power Systems, a division of Cooper Industries, plc. (NYSE: CBE), today announced that it has completed installation of its first Triplex Indoor Power Center (IPC) at the 40-story, twin tower Chicago Mercantile Exchange Building (CME) in Chicago, IL. The installation is designed so that a building tenant might expect to see a 35% reduction in energy costs, up to a 20% reduction in HVAC costs, up to a 50% noise reduction level, and has 50% higher short term overload capacity compared to traditional indoor equipment choices. “Today’s building owners and managers are under intense pressure to reduce energy and HVAC costs, eliminate noise and provide tenants with an increased amount of electrical power,” stated Steve Benna, vice president, commercial/industrial sales and marketing, Cooper Power Systems. “Cooper’s Triplex IPC achieves those goals by taking advantage of the fire resistant properties of FR3 dielectric fluid to permit installation in limited space areas – delivering measurable value to building owners before the power is even turned on.” The field assembly of the Triplex Indoor Power Center involved coordination of a number of individual components, with the installation team overcoming physical building constraints including a 5’W X 8’H service elevator door. Buildings similar to the Mercantile Exchange in the Chicago financial district are going through their 2nd or 3rd generation of tenants. Tenant turnover translates into revamping office space and reevaluating electrical needs – a process that escalates over time. Often, the dimensions of new electrical equipment designed to meet the need for increased capacity exceed the openings of the buildings in which they’re going to be installed, increasing the cost and complexity of the installation. -More- Cooper Power Systems – Page 2 The modular design of the Cooper Power Systems Triplex Indoor Power Center not only gives architects and building owners the power their tenants need, it provides them with the flexibility necessary to get into electric rooms and other spaces by way of existing service elevators and hallways, optimizing the time needed for office re-designs and minimizing the need for building modifications. “This is a significant evolution in technology that provides an attractive, higher-efficiency alternative to dry-type transformers,” said Chad Mendell, vice president, Environmental Systems Design. “Its value will be restated every time users receive an electric bill.” Editor’s Note: For additional information, contact Lauren Ban at (412) 394-6611 or lauren.ban@bm.com. About Cooper Power Systems Cooper Power Systems, Inc., with 2009 revenues of approximately $1.1 billion, is a division of Cooper Industries plc (NYSE: CBE). Cooper Power Systems is a global manufacturer of world-class power delivery and reliability solutions for the electrical and industrial markets. Through its Energy Automation Solutions group, it is also a leading provider of software, communications and integration solutions that enable customers to increase productivity, improve system reliability, and reduce costs. For more information, please visit www.cooperpower.com or cooperpowereas.com. About Cooper Industries Cooper Industries plc (NYSE: CBE) is a global manufacturer with 2009 revenues of $5.1 billion. Founded in 1833, Cooper's sustained level of success is attributable to a constant focus on innovation, evolving business practices while maintaining the highest ethical standards, and meeting customer needs. The Company has seven operating divisions with leading market share positions and world-class products and brands including: Bussmann electrical and electronic fuses; CrouseHinds and CEAG explosion-proof electrical equipment; Halo and Metalux lighting fixtures; and Kyle and McGraw-Edison power systems products. With this broad range of products, Cooper is uniquely positioned for several long-term growth trends including the global infrastructure build-out, the need to improve the reliability and productivity of the electric grid, the demand for higher energy-efficient products and the need for improved electrical safety. In 2009, sixty-one percent of total sales were to customers in the industrial and utility end-markets and thirty-nine percent of total sales were to customers outside the United States. Cooper has manufacturing facilities in 23 countries as of 2009. For more information, visit the website at www.cooperindustries.com. ### 2