ABOUT US About United Electric United Electric Supply was founded by Norman Gronna in 1975 and was family-owned and operated for over 36 years, priding itself on customer service and support. In 2011 Main Electric Supply, Inc. acquired United Electric Supply, continuing its legacy and passion for the electrical industry. Now United Electric Supply consists of two branch offices and has expanded its growth and service throughout most of California. Main Electric Supply, Inc began its history in 1946 when Charles Vowels and Burt McCombs set out to meet the electrical industry’s growing demands and founded Main Electric Supply. Since the beginning, United Electric has maintained faithful relationships with electricians and builders who have grown accustomed to United’s service, supply, and reliability. We will continue to grow, embrace technology, and provide comprehensive solutions to industry challenges. Together we can build a bright and sustainable future. Norm Gronna, Founder Of United Electric Supply Burt McCombs and Charles Vowels, Founders Of Main Electric Supply Locations To Serve You Chino Address 15497 Dupont Avenue Chino, CA 91710 (909) 393-4700 San Diego Address: 5474 Complex Drive Suite 501 San Diego, CA 921223 (858) 737-7077 Links Careers Contact Us Locations Credit Account Delivery Notification Address 15497 Dupont Ave. Chino, CA 91710 Contact Info 909-393-4700 info@unitedelectricsc.com United Electric Supply Chino © 2021. All Right Reserved. Designed by LightHouse Graphics

LINE CARD We have partnered with the industry’s biggest names to guarantee that we have the most local inventory at the most competitive prices. Here are some of our premier partners. If you don’t see what you are looking for give us a call. BALLASTS FANS & VENTILATION FUSES MOTOR CONTROL BOXES CONDUIT, ELBOWS & COUPLING FITTINGS GUTTER, CHANNEL & RACEWAY INSULATION MATERIALS & FIRESTOP LAMPS LIGHTING FIXTURES TRANSFORMERS LUGS, STAKONS & TERMINAL BLOCKS WIRE & MEDIUM VOLTAGE CABLE SENSORS & DIMMERS TOOLS, METERS & BATTERIES WIRING DEVICES SMOKE DETECTORS SIGNAL EQUIPMENT TIMER & PHOTOCELLS SWITCHGEAR PORTABLE CORDS & CABLE FANS DECORATIVE DOWNLOAD Links Careers Contact Us Locations Credit Account Delivery Notification Address 15497 Dupont Ave. Chino, CA 91710 Contact Info 909-393-4700 info@unitedelectricsc.com United Electric Supply Chino © 2021. All Right Reserved. Designed by LightHouse Graphics