Ensure compliance, safety, and market access for your control panels with Intertek's ETL Panel Builder Certification Program to UL 508A.
Intertek’s UL 508A Panel Builder Certification Program helps manufacturers of industrial control panels achieve fast, cost-effective compliance with North American requirements. Whether you operate a UL 508A panel shop or build custom control panels, our program simplifies the path to certification while ensuring your products meet rigorous safety and performance standards.
UL 508A is the primary standard governing the construction of industrial control panels in the United States, covering design, component selection, wiring, and safety requirements for systems operating up to 1000V. Achieving certification demonstrates that your panels meet nationally recognized safety criteria and are ready for installation and inspection.
What is UL 508A Certification?
UL 508A certification verifies that your industrial control panels are designed and built in accordance with the UL 508A standard. This includes:
- Proper component selection and usage
- Short Circuit Current Rating (SCCR) validation
- Compliance with NEC (NFPA 70) requirements
- Electrical spacing, wiring, and enclosure standards
- Markings, labeling, and documentation
Certification is essential for market acceptance, AHJ approval, and risk reduction in industrial environments.
Intertek UL 508A Panel Builder Program
Our panel builder program provides a streamlined alternative to traditional certification models, enabling your panel shop to produce compliant panels more efficiently.
ETL Panel Builder Program Advantages:
- Greater Choice in Component Sourcing: Unlike our competitors, Intertek permits the use of any NRTL-approved or -recognized components, as well as those already approved under the scope of the ICP program.
- Fulfilled Requirements: The ETL Panel Builder Program covers proper component usage, circuit requirements (power and control), Short-Circuit Current Ratings and determination; as well as designing for compliance to the National Electric Code (NEC) and Canadian Electrical Code (CEC).
- Efficiency: Avoid costly delays by eliminating red-tagged panels at the job site.
- Flexibility: ETL's program covers open-, enclosed-, indoor-, and outdoor-use panels for the U.S. and Canada.
- Acceptance: Our ETL Listed Mark is accepted by regulatory authorities in every jurisdiction in the United States and Canada.
- Cost Savings: Competitively priced flat rate fee for factory follow up costs, and cost-effective component evaluations are all a part of the program.
- Expertise: Knowledgeable team with field and practical expertise are available for technical discussions and training.
- Ongoing Conformity: Expert engineers conduct on-site audits to assist in compliance.
- Additional Training & Resource Options: Whether or not you choose to participate in the ETL Panel Builder Program, we invite you to be more fully prepared for compliance by attending one of our scheduled training sessions, contacting us for customized training or contacting us for other ways we can help you navigate through ICP requirements and standard updates.
Intertek’s program is designed to support both custom panel builders and high-volume industrial control panel manufacturers.
Who Needs a UL 508A Panel Shop Certification?
This program is ideal for:
- OEMs building industrial control panels
- System integrators and automation providers
- Electrical contractors and panel builders
- Manufacturers exporting to the U.S. and Canada
If you build or modify control panels, certification ensures compliance and prevents costly delays during inspection or installation.
UL 508A Panel Shop vs. Field Evaluation
| Feature | UL 508A Panel Shop Certification | Field Evaluation |
| Best For | Repeated panel production | One-off panels |
| Cost Efficiency | High (long-term) | Lower upfront, higher per unit |
| Speed | Faster approvals | Slower, per installation |
| Scalability | Excellent | Limited |
A certified UL 508A panel shop enables you to label panels directly, reducing reliance on third-party field inspections.
Panel Builder Training & Certification Support
Intertek offers comprehensive panel builder training and technical guidance with our Industrial Control Panels Training Courses to ensure your team understands UL 508A requirements, including:
- Design and documentation best practices
- SCCR calculations and compliance
- Component selection and integration
- Updates to evolving standards (e.g., 2025 UL 508A revisions)
Our training supports your journey toward full panel builder certification and ongoing compliance.
Intertek also offers Control Panel Builder Certification for custom Industrial Control Panels intended for Hazardous Locations.
Why Choose Intertek for Control Panel Certification?
- Global Expertise: Trusted certification partner for industrial equipment
- End-to-End Support: From design review to final certification
- Speed to Market: Accelerated programs for control panel certification
- Flexible Solutions: Certification for standard and hazardous location panels
- Industry Leadership: Active participation in UL standards development
Get Started with UL 508A Certification with Intertek
Whether you’re launching a new panel shop or scaling production, Intertek helps you achieve UL 508A certification quickly and efficiently. Contact us today!
UL 508A Certification – Frequently Asked Questions (FAQs)
UL 508A is the primary safety standard for industrial control panels in the United States, defining requirements for construction, wiring, protection, and performance.
UL 508A and UL 508 are both safety standards but apply to different aspects of industrial control systems. UL 508A governs the entire control panel, while UL 508 covers the components inside the panel.
- UL 508A (Industrial Control Panels):
Focuses on the construction, wiring, and assembly of industrial control panels. It is used by panel builders to ensure complete panels meet safety requirements for installation in the field. - UL 508 (Industrial Control Equipment):
Applies to individual components such as switches, relays, motor controllers, and other control devices used within a panel.
Applicable standards for industrial control panels depend on the region, application, and installation environment, but a core set of widely recognized standards governs safety, performance, and compliance.
UL 508A - The foundational standard for industrial control panels in the United States. It covers:
- Panel construction and wiring methods
- Component selection and usage
- Short Circuit Current Rating (SCCR)
- Marking and labeling requirements
NFPA 70 (National Electrical Code) - Defines installation requirements for electrical equipment, including control panels. UL 508A ensures the panel is built correctly, while NEC governs how it is installed.
NFPA 79 - Applies specifically to electrical equipment of industrial machines, often used alongside UL 508A for machine control panels.
Canadian Standards for Industrial Control Panels
- CSA C22.2 No. 286 - The Canadian equivalent to UL 508A, addressing construction and certification of control panels.
- Canadian Electrical Code (CEC) - Covers installation requirements in Canada, similar to NEC in the U.S.
International / IEC Standards for Industrial Control Panels
- IEC 61439 - A globally recognized standard for low-voltage assemblies, often used outside North America.
- IEC 60204-1 - Focuses on electrical equipment of machines, similar to NFPA 79.
Additional / Application-Specific Standards for Industrial Control Panels
Hazardous Locations (if applicable)
- UL 1203 - Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations
- IEC 60079 series - "Explosive atmospheres" representing a comprehensive set of international standards for electrical equipment used in hazardous locations (Ex equipment)
- Explosionproof vs. Flameproof: Understanding the Differences Between IEC 60079-1 and ANSI/UL 1203
Functional Safety
- IEC 61508 - Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems (E/E/PE or E/E/PES)
- ISO 13849-1 - Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design
Environmental & Enclosure Protection
- UL 50E - Enclosures for Electrical Equipment, Environmental Considerations
- NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum)
How These Standards Work Together
- UL 508A / CSA 286 → How the panel is built
- NEC / CEC → How the panel is installed
- NFPA 79 / IEC 60204-1 → Machine-specific requirements
- IEC 61439 → International design alternative
- Specialized standards → Apply based on environment or function
Yes. Most jurisdictions and inspectors require UL 508A certification to approve control panels for installation and operation.
A UL 508A panel shop is a certified facility authorized to build and label industrial control panels in compliance with UL 508A requirements.
UL 508A certification allows ongoing production of compliant panels, while field evaluation is typically used for one-off or modified panels.
Timelines vary, but Intertek’s panel builder program is designed to accelerate certification and reduce delays compared to traditional methods.
Yes. Intertek provides panel builder training to help your team understand UL 508A requirements, improve compliance, and maintain certification. View our Industrial Control Panels Training Courses.
UL 508A applies to a wide range of industrial control panels, including machinery control panels, HVAC systems, and automation systems operating up to 1000V.
Related Links
The ETL Listed Mark is the fastest growing certification mark in North America, widely accepted by AHJs and building code officials.
Panel Building Program Resources
ETL Certification Advantages: Intertek’s Panelshop Program | Fact Sheet
Intertek's Panelshop Program offers manufacturers a flexible, cost effective alternative to traditional panel certification by allowing the use of any compliant components. Download our complimentary fact sheet to learn more.
Industrial Control Panels UL508A | White Paper
The June 26, 2025 revision of UL 508A introduces a range of updates that reflect the evolving landscape of industrial automation and safety standards. Download our white paper and learn about the revisions and how they will impact you.
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