In 1947, Thomas F. Peterson, an electrical engineer  in the USA, came  up with an innovative idea that became the catalyst to forming a worldwide organization that would ultimately grow into an international company with operations in twenty countries.

Responding to a customer’s concern about conductors breaking at the point of support, Peterson thought of preforming rods into a helix having an inside diameter somewhat smaller than the outside diameter of the conductor.

The theory was that helically preformed rods, when applied over conductor, could provide a secure fit without end clamps, as well as ‘armor’ to protect the conductor from abrasion and fatigue at points of attachment. This idea proved successful and the product was called the PREFORMED™ Armor Rod, patented in 1954. Armor Rods offer superior reinforcement and protection advantages over conventional wire and clamping methods. The helical concept then grew into a complete line of products for the electric power utility and communications industries.

Recognized branded products like the GUY-GRIP® Dead-End revolutionized pole guying, and the ARMOR-GRIP® Suspension created a new standard of excellence for transmission conductor support systems. Peterson went on to patent 28 additional products for Preformed Line Products, bringing to fruition a large number of industry ‘firsts’ and serving customers needs with effective solutions.Inventiveness, integrity, and foresight are the foundation of Preformed Line Products and its people continue to build the company with new product ideas for the industries it serves. PLP’s patented products now serve the electric power utility, communications, cable and broadband service providers as well as other specialized niche markets. From PLP’s early days to present, and looking forward to the future, this dedication to innovation is what has made Preformed Line Products a recognized global leader.


PLP First Headquarters


PLP is a diversified global corporation that provides infrastructure solutions to the energy, communications, renewable power, transit, marine, and agriculture industries, among others. PLP delivers high-quality, dependable solutions and market-leading customer service through a global network of 23 primary facilities and more than 3,000 employees.

PLP maintains wholly-owned subsidiaries in Australia, Austria, Argentina, Brazil, Canada, China, Colombia, Czech Republic, France, Great Britain, Indonesia, Malaysia, Mexico, New Zealand, Poland, Russia, South Africa, Spain, Vietnam and Thailand. These international operations work together to provide PLP with outstanding global market coverage and customer service in more then 140 countries around the world. In addition to manufacturing traditional products, PLP’s operations provide products uniquely suited to meet the needs of its customers. PLP’s commitment to technical innovation, along with outstanding product performance and exceptional customer service, are the hallmarks of its world-wide capabilities

Global PLPTH