The Nation's Premier Commercial Wire Harness Manufacturers

From automotive and aerospace to industrial and medical, we have the expertise and experience to design and build custom wire harnesses and PCB's that meet your exact specifications. RPI is ISO 9001-2015 certified.

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Why Choose Us?

  • Industry Expertise

    With years of experience in these fields, we bring unmatched expertise to every project. Our team of skilled professionals understands the unique requirements of a myriad of industries, delivering solutions that exceed expectations.

  • Customized Solutions

    We don't believe in one-size-fits-all solutions. Whether you need a complex wiring system for your next-generation vehicle or a high-performance harness for aerospace applications, we tailor our services to meet your specific needs and requirements.

  • Cutting-Edge Technology

    We invest in the latest technology and tools to stay ahead of the curve. From advanced design software to a state-of-the-art production facility, we leverage cutting-edge technology to deliver precision-engineered wire harnesses of the highest quality.

  • Scalability

    Whether you need a small batch or a large-scale production run, we have the capacity and capability to handle orders of any size. Our streamlined processes and efficient production methods ensure timely delivery without compromising on quality.

  • Quality Assurance

    Quality is at the core of everything we do. Our rigorous quality control measures and testing protocols ensure that every wire harness meets the highest standards of performance, reliability, and durability.

We specialize in serving national brands and large manufacturers in verticals from automotive, agricultural, factory automation, aerospace, and more, delivering top-notch quality and expertise for your production needs. Join the ranks of leading manufacturers who trust us for their wire harness needs, and experience the difference first hand. Contact us today to discuss your project requirements and discover how we can help you achieve success.

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Proudly Manufactured in the
United States

At RPI, we take great pride in manufacturing custom products that are made right here in the US. From our base in Racine, Wisconsin, we use only the highest quality materials and components to craft wiring solutions that are durable, reliable, and built to last. By choosing RPI, you can trust that you are getting a product that is not only tailored to your specific needs, but also represents the quality and craftsmanship of American manufacturing.

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Commercial Wire Harness and cable Products

Point to Point Harnesses

Point to Point Harnesses are designed to provide accurate and reliable wiring connections in a minimal amount of space. Our experienced team of engineers can design and manufacture harnesses to meet the most demanding specifications and to ensure optimal electrical performance.


With RPI's Point to Point Harnesses, you can trust that your equipment will operate at peak efficiency and productivity, while minimizing the risk of electrical failures and downtime. 

Complex Machinery Harnesses

RPI's Complex Machinery Harnesses are engineered to meet the challenges of high-temperature and vibration environments that are common in the industrial sector. We use only the highest-quality materials and components to ensure that our harnesses can withstand even the most rigorous conditions.


Our team of engineers is highly skilled in designing complex harnesses that integrate seamlessly with your equipment and can optimize your production processes, allowing you to achieve greater efficiency, reliability, and profitability.

Complex Machinery Harnesses

RPI's Complex Machinery Harnesses are engineered to meet the challenges of high-temperature and vibration environments that are common in the industrial sector. We use only the highest-quality materials and components to ensure that our harnesses can withstand even the most rigorous conditions.


Our team of engineers is highly skilled in designing complex harnesses that integrate seamlessly with your equipment and can optimize your production processes, allowing you to achieve greater efficiency, reliability, and profitability.

Multiple Branch Conductor

Multiple Branch Conductors provide an effective solution for the distribution of power and control signals to multiple locations in industrial and automation settings. Our custom-designed harnesses can be tailored to meet your specific requirements, ensuring that your equipment operates with maximum efficiency and productivity.


With RPI's Multiple Branch Conductors, you can trust that your power and control signals will be distributed accurately and reliably, helping to prevent costly downtime and delays in production.

Commercial Harness

Design / Manufacturing                 

RPI's custom harness design and manufacturing services enable us to provide our clients with the precise wiring solutions they need to optimize their equipment and production processes. Our team of engineers works closely with clients to understand their unique requirements and develop custom harness designs that meet their specifications and exceed their expectations.


Whether you need a simple harness or a complex system, RPI has the expertise and resources to deliver a high-quality product that will help you achieve greater efficiency, reliability, and profitability. With RPI's wire harness design and manufacturing services, you can trust that your wiring needs will be met with innovative and cost-effective solutions.

Custom Harness

Design / Manufacturing

RPI's custom harness design and manufacturing services enable us to provide our clients with the precise wiring solutions they need to optimize their equipment and production processes. Our team of engineers works closely with clients to understand their unique requirements and develop custom harness designs that meet their specifications and exceed their expectations.


Whether you need a simple harness or a complex system, RPI has the expertise and resources to deliver a high-quality product that will help you achieve greater efficiency, reliability, and profitability. With RPI's custom harness design and manufacturing services, you can trust that your wiring needs will be met with innovative and cost-effective solutions.

Commercial Wire Harness and cable Creation for Industry Specific Solutions

Agriculture

Custom wiring harnesses are essential in the agriculture industry to ensure the efficient operation of heavy equipment, such as tractors and harvesters. These harnesses provide a reliable connection between sensors, controllers, and other components in the machinery. With custom wiring harnesses, farmers can monitor and control the performance of their equipment, optimize the use of resources, and improve crop yield.


Additionally, these harnesses can withstand the harsh environmental conditions of the field, such as moisture and vibration, which are common causes of equipment failure. Overall, custom wiring harnesses in the agriculture industry increase efficiency, productivity, and profitability.

Automotive

The automotive industry relies on custom wiring harnesses for seamless operations. They enable the connection between various electronic components in modern vehicles. These harnesses are customized to fit specific vehicle models, ensuring a precise fit and proper functioning of all systems. Custom wiring harnesses also reduce the risk of electrical failure, which is a common issue in older vehicles. 


Moreover, these harnesses simplify the installation process, saving time and money for both manufacturers and mechanics. In addition, custom wiring harnesses can improve the safety and performance of vehicles by providing precise control over systems such as fuel injection, engine management, and transmission.

Factory Automation

Without custom wiring harnesses, the factory automation industry would suffer from downtime and inefficiencies. wiring harnesses play a crucial role in factory automation by providing a reliable and efficient connection between sensors, controllers, and other components in machinery. These harnesses are tailored to fit the specific needs of the factory, including the type of equipment, communication protocols, and signal transmission requirements. 


With custom wiring harnesses, factory managers can ensure that their machinery operates at peak performance, reducing downtime and improving productivity. Custom wiring harnesses also facilitate the integration of new equipment into existing systems, making it easier to upgrade factory operations and improve efficiency.

Industrial

Custom wiring harnesses are widely used in the industrial sector to power and control the complex machinery and equipment found in manufacturing plants, processing facilities, and other industrial settings. These harnesses can be designed to withstand harsh conditions, including extreme temperatures, moisture, and chemical exposure. Additionally, they can be customized to integrate with a range of sensors, controllers, and other components, allowing for precise and efficient control of industrial processes.


By providing tailored wiring solutions, industrial companies can improve their equipment's safety, reliability, and performance, ultimately increasing their bottom line. At RPI, we have experience designing and manufacturing custom wiring harnesses for various industrial applications, ensuring our clients' equipment runs smoothly and efficiently.

Medical

Precision and reliability are essential in the medical industry, and custom wiring harnesses deliver both. These harnesses are designed to meet the strict regulatory standards for medical equipment, ensuring patient safety and compliance with industry regulations. 


Custom wiring harnesses enable medical devices to perform with accuracy and consistency, providing doctors and patients with reliable results. These harnesses are also tailored to the specific needs of medical equipment, such as the size and shape of the connectors, the length of the wires, and the signal transmission requirements.

Rail

Wiring harnesses are an essential investment for the rail industry's long-term success. Custom wiring harnesses enable for the reliable and efficient operation of trains and other rail vehicles. These harnesses are designed to withstand the vibration and shock of rail travel, as well as the harsh environmental conditions of the tracks. 


Custom wiring harnesses facilitate the communication between control systems and sensors, ensuring the safe and precise operation of the train. These harnesses can also provide additional safety features, such as emergency stop buttons and warning alarms, to protect passengers and crew. Overall, custom wiring harnesses in the rail industry improve safety, efficiency, and reliability.

Power

Custom wiring harnesses play a vital role in the power industry, where precision and safety are of utmost importance. They are used to connect generators, transformers, switchgear, and other electrical components. These harnesses are designed to withstand high temperatures and pressures and are crucial for the efficient transmission of electricity. 


Power plants and distribution facilities require a wide range of custom harnesses that can handle high-voltage applications, including transmission, distribution, and renewable energy systems. Our harnesses are manufactured to the highest standards and are designed to meet the unique requirements of each project.

Aerospace

The aerospace industry's complex machinery depends on custom wiring harnesses for optimal performance. This industry demands highly reliable and durable wiring harnesses due to the harsh environments and critical applications. Custom wiring harnesses are used in aircraft for avionics, navigation, and communication systems. 


These harnesses are designed to withstand extreme temperatures, vibrations, and electromagnetic interference. In aerospace, reliability is paramount, and any failure in the wiring can lead to catastrophic consequences. Our custom wiring harnesses are built to the strictest industry standards and are designed to operate flawlessly in the most demanding aerospace environments.

Transportation

Transportation is a broad industry that encompasses many different modes of transportation, including cars, buses, trucks, and trains. Custom wiring harnesses play a critical role in all of these modes of transportation, connecting vital systems like engine control, lighting, and communication. In the transportation industry, durability and reliability are key, as any failure in the wiring system can lead to accidents or costly downtime. 


Our custom wiring harnesses are designed to meet the rigorous requirements of the transportation industry and are built to withstand harsh environments, extreme temperatures, and constant vibration.

Robotics

Robotics is a rapidly growing industry that requires custom wiring harnesses for a variety of applications, including control systems, sensors, and power distribution. Custom wiring harnesses are used to connect and integrate the different components in a robot, ensuring seamless communication and optimal performance. In robotics, precision and accuracy are critical, and our custom wiring harnesses are designed to meet these exacting standards. 


We work closely with our clients to create custom solutions that meet their specific requirements, whether they need a custom wiring harness for a single robot or a large-scale automation system.

Military

Custom wiring harnesses play a vital role in military applications, where reliability, durability, and safety are paramount. Military applications require harnesses that can withstand harsh environments, shock, and vibration, as well as electromagnetic interference. Custom wiring harnesses are used in a wide range of military equipment, including ground vehicles, aircraft, and communication systems. 


We understand the unique requirements of military applications and design our harnesses to meet the highest standards of quality and performance.

Oil & Gas

In the oil and gas industry, custom wiring harnesses are indispensable. They are used in drilling equipment, pumps, and other critical systems. These harnesses are designed to operate in harsh environments, including high temperatures, pressure, and exposure to chemicals. The oil and gas industry also requires harnesses that can withstand constant vibration and shock. 


Our custom wiring harnesses are built to meet these challenging requirements and are designed to ensure reliable operation in the most extreme environments. We work closely with our clients to create custom solutions that meet their specific needs, ensuring that our harnesses deliver optimal performance and longevity.

Agriculture
Automotive
Factory Automation
Industrial
Medical
Rail
Power
Aerospace
Transportation
Robotics
Military
Oil & Gas
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What Clients Say About Us

We have been with RPI for 25 years and they have always delivered an incredible personal experience and quality products. We highly recommend them.


Judy S.

The team in Wisconsin is great! Always responsive with great personal service. Fast troubleshooting and terrific testing!


Tim A.

We use RPI for our Harness requirements in our Tractor Division. The team is A+, we always get quality, communication, and we are very satisfied!


George D.

We use RPI for our Auto Testing Equipment. They tackle very complicated equipment challenges, are always on time, always do quality work, testing, and unbelievable follow-through.


Jeff M.

Good Wire Harnesses and Good People! Very Satisfied!

Matt F.

Rather Connect Over the Phone or Chat?

Looking for a more personalized experience? We've got you covered! Whether you prefer the ease and convenience of a phone call or the flexibility of chat, we're here to connect with you on your terms. Our friendly and knowledgeable team is always available to answer your questions, discuss your needs, and provide tailored solutions that meet your specific requirements. So why wait? Contact us today and let's connect on your preferred platform!

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