Industrial Control Panels: What to Look for in a UL-Listed Panel Shop

Industrial panels.

August 17, 2026

Why UL Listing and Experience Matter

Choosing an UL-listed panel shop with the locations and resources to get quality panels built and delivered faster benefits your project schedule. UL508a-certified industrial control panels give your projects superior, repeatable quality that meets best-in-class global standards. Interstates has been building quality control panels for over 40 years, and for over 25 years, we’ve been UL listed. Our UL-listed panel shops are in Sioux Center, IA, Fort Collins, CO, and Omaha, NE. Our panel experts have the resources and knowledge to provide many types of industrial panels, including PLC or DCS Controls, Remote I/O, Network, HMI, VFD and Starter, Power Distribution, and Heat Trace Controls.

How Panel Fabrication Supports Speed to Market

Industrial project teams have to balance compressed schedules, long-lead components, limited shutdown windows, and constrained field labor. Delays can postpone process improvements and extend the time required to realize returns on your capital investments. Partnering with a panel shop early allows the team to identify schedule risks, confirm component availability, and align design and fabrication activities with the project timeline. 

At Interstates, standard component selections help support in-shop and supplier inventory, reducing procurement time and exposure to material lead-time constraints. When appropriate, configurable products and predesigned solutions can also reduce engineering time and expedite fabrication. Standard manufacturing processes, quality control procedures, and end-of-line testing help ensure panels leave the shop on schedule and ready to go, reducing troubleshooting and rework at your facility. Interstates also coordinates estimating, engineering, and fabrication resources across our locations and regularly evaluates our project queue to align capacity with your specific delivery requirements. 

Questions to Ask Before Choosing a Panel Shop

When choosing an industrial control panel shop, you need to consider more than just prices and delivery dates. The right partner should have the certifications, engineering capabilities, quality controls, and communication processes needed to support the project from design through commissioning. When evaluating a panel shop, consider asking: 

  • Do you build UL 508A-listed control panels? 
  • Can you provide support from design through commissioning? 
  • Do you have approved alternatives for long-lead components? 
  • Can you support factory acceptance testing? 
  • How do you manage schedule changes? 
  • What standard processes do you use for fabrication and quality control? 
  • How do you communicate panel manufacturing progress to clients? 

Integrated Support from Design Through Commissioning 

Older PLCs, HMIs, drives, and other control components may eventually reach the end of manufacturer support or become difficult to source. Although many facilities begin evaluating modernization after 15 to 20 years or earlier, the appropriate timing depends on the system, operating environment, maintenance history, and availability of replacement parts. Proactive lifecycle planning can improve maintainability, reduce the risk of downtime, and help you avoid emergency replacements when critical components fail. Interstates can plan and support system changeovers within limited shutdown windows, including weekend outages when needed, while coordinating panel upgrades and related controls work to minimize disruption. 

Interstates brings panel fabrication, engineering, programming, field installation, and commissioning together through one connected team. This turnkey approach creates a single point of accountability, reduces handoffs between vendors, and helps keep drawings, panel design, programming, and field installation aligned as the project develops. When design changes affect installation or controls programming, our team can coordinate adjustments directly, supporting smoother factory acceptance testing, start-up, and troubleshooting. 

Our support continues after installation. Interstates can provide ongoing service, technical support, and preventive maintenance to help you maintain system performance, address issues, and plan for future equipment needs. By working with one partner from design through long-term support, you can reduce coordination challenges and avoid delays caused by unclear responsibilities among multiple vendors. 

Speed matters, but quality, documentation, testing, and maintainability are just as important. The right industrial control panel partner helps protect the project schedule through early planning, standard components and processes, coordinated design and fabrication, and clear communication throughout production. This approach reduces the risk of delays and helps prevent problems during installation, commissioning, and future system expansion. With integrated capabilities in engineering, programming, fabrication, field support, and ongoing maintenance, Interstates can support the system throughout its lifecycle while helping you realize the value of your capital investments sooner. 

Have an upcoming industrial control panel project or questions about choosing the right panel partner? Contact Interstates at bdev@interstates.com or 712-722-1662 to discuss your needs, explore the benefits of an integrated approach, or learn more about our turnkey panel capabilities. 

 

This article was originally posted on May 22, 2022.