CORE Electric Cooperative is a member-owned, not-for-profit electric utility that provides more than 300,000 people along Colorado's Front Range The Energy to Thrive.

The CorePower Magnetics founding team includes the inventors of the underlying technology, combined with the necessary business expertise to bring this technology to market. With deep experience across soft magnetics, manufacturing, and commercializing energy technologies, they’re ready to power the future.

CPS Energy is the nation’s largest community-owned provider of electric and natural gas services, serving more than 970,000 electric and 390,000 natural gas customers in San Antonio and surrounding areas.

Crana Electric, Inc. is a full service, union, electrical contracting company, offering excellence in electrical contracting work in the New York metro area since 2002. We offer services in a wide variety of areas, including commercial interiors, retail, hotels, banking institutes, healthcare, educational, hospitality, condominiums, apartment buildings, and theatre.

Crawford Electric Supply provides the customer's product solutions in the right place, at the right time and at the right price.Crawford services the Commercial, Residential and Industrial markets and is considered the industry choice for quality expertise in electrical distribution.

Founded in 1919 by Titus B. Schmid, Crescent Electric remains privately held today and as such is the eighth largest distributor in the United States of America and the second largest privately held such company.

Crestron is the innovator and manufacturer of advanced control and automation systems for the office, campus, and home, reinventing the way people live and work. With integrated solutions to monitor, manage, and control audio, video, and lighting, shades, and climate,

Crum Electric Supply Co., Inc.'s headquarters are in Casper, WY with 10 branch locations in Wyoming, South Dakota, Colorado and Utah. Crum Electric Supply has grown steadily since its beginning. Growth has come both internally and by acquisition.

CSI has become a pioneer in highly technical and innovative electrical design and construction. They are a full-service firm with the resources and expertise to handle any commercial, industrial, or one-of-a-kind challenge. They are a trusted contractor to a variety of industries, such as, aerospace, biotech/pharmaceutical, education, healthcare, entertainment, hospitality, manufacturing, and retail to name a few.

Cuivre River Electric Cooperative (CREC) is headquartered in Troy, Missouri, with a branch office in Lake Saint Louis, Missouri. They belong to and were built by, the communities they serve.

Cupertino Electric, Inc. (CEI) is a 67-year-old electrical engineering and construction company headquartered in San Jose, California that solves large, complex problems for commercial, renewable, utility and data center customers.

CyberPower designs and manufactures uninterruptible power supply (UPS) systems, power distribution units (PDUs), rack enclosures, surge protectors, remote management hardware, power management software, mobile chargers, and connectivity products.

Delco Electric Inc., a family owned and established in 1979, is an award-winning commercial electrical contractor, specializing in negotiated design build and design assist projects of any size. With over 35 years of experience in the construction industry, Delco Electric has assembled a team of dedicated professionals to become one of Oklahoma’s premier electrical contractors.

Denier know them as a people-oriented company. Family owned and operated since 1942, they put a great deal of care in the selection and training of each employee. Their partnership with the users is a trust that only bright, motivated, experienced individuals can guarantee.

Denney Electric Supply was founded in 1938 on simple principles: fast, friendly service for residential, industrial, and commercial contractors.

DENT Instruments designs and manufactures data loggers and energy meters for today's energy professionals. Their products are often the first step in developing strong energy strategies, for maintaining peak operations, and for lowering operating costs.

Devard's Air Conditioning & Heating, Plumbing and Electrical offers affordable, reliable, energy-efficient, commercial and residential plumbing, air conditioning, heating and air conditioning units for the Dallas - Ft. Worth area with their '100% customer satisfaction policy', which is their company motto and what has led to their success.

Diamond Electric Mfg. Corporation is recognized as a globally renowned company in safe, reliable and cost competitive automotive electrical components.

Diodes Incorporated is a renowned global manufacturer and supplier of high-quality semiconductor products to the world’s major companies in the automotive, industrial, computing, consumer electronics, and communications markets. Their broad range of application-specific solutions and solutions-focused sales, coupled with worldwide operations of 32 sites, includes engineering, testing, manufacturing, and customer service,

DITEK Surge Protection is a proactive investment to safeguard the most valuable electronic and digital assets. It’s like insurance to protect communications, fire protection, security systems, home appliances – anything plugged in to connect to power.

DKD Electric has committed to providing the highest level of expertise to its customers. As a pioneer in the electrical contracting industry, they have set the standards with their highly skilled team and vast amount of experience.

Dolce Electric Co is an electrical contractor based in Mesa, Arizona, USA. They provide electricians for commercial and residential electrical services. In business since 1999, they provide free estimates and a lifetime parts and labor guarantee with every completed project. Their electricians in Mesa are equipped with the latest diagnostic and electrical repair technology and tools.

Dominion Electrical Supply Company, Inc. has providing electrical contractors, remodelers, building managers, and homeowners with electrical supplies, switchgear solutions, commercial lighting, residential lighting, and more. Family-owned and operated by the Sharlin and Krooth families, Dominion strives to be the electrical distributor of choice in the D.C. metropolitan area.

Dominion Energy is committed to sustainable, reliable, affordable, and safe energy and to achieving net-zero carbon dioxide and methane emissions from power generation and gas infrastructure operations by 2050.

Doug's Electrical Service installs Generac home standby generators. They can install the generator and automatic transfer switch.

At Drawer, they combine decades of real-world electrical estimating expertise with cutting-edge artificial intelligence to build tools that work the way estimators think.

Dreisilker Electric Motor and Appliance Service by Henry Dreisilker , the company specialized in commercial motor repair and sales. As the business grew Mr. Dreisilker re-focused the core competency of the business towards industrial large scale motor re-manufacturing.

DRM Electrical is Milwaukee's choice for electrical contractors for construction, repair work, cabling, networks and inspections. They meet the needs of their clients for every project by working hard and use their years of industry experience.

For more than 100 years, Duquesne Light Company has provided safe and reliable electric service to communities in southwestern Pennsylvania, USA. They are committed to safely powering customers’ lives while playing an important role in their region’s clean energy transition. Their vision is to create a larger-than-light, clean energy future for all by delivering exceptional results.

Duralec is the fastest-growing supplier of LED lighting solutions in the Midwest, serving clients across the commercial, industry and retail sectors with LED lights, fixtures and supplies that are guaranteed to perform.