Industrial facilities operating in hazardous locations require specialized electrical equipment to ensure safety and compliance. Two critical certifications for electrical control panels used in these environments are UL 698A and UL NNNY. Understanding their applications and requirements is essential for engineers, electricians, and facility managers working in industries such as oil and gas, chemical processing, and manufacturing.
What is UL 698A?
UL 698A is the Underwriters Laboratories (UL) Standard for Safety for Industrial Control Panels Relating to Hazardous Locations. It applies to control panels used in non-incendive, purged, and pressurized systems that control equipment in hazardous environments.
What is UL NNNY?
UL NNNY certification is for control panels specifically designed for use in hazardous (classified) locations, including environments with flammable gases, vapors, and combustible dust. These panels undergo rigorous testing to ensure they do not become ignition sources.
Key Differences Between UL 698A and UL NNNY
| Feature | UL 698A | UL NNNY |
|---|---|---|
| Application | Panels associated with hazardous locations but located in non-hazardous areas | Panels installed directly in hazardous locations |
| Protection Method | Requires purging, pressurization, or intrinsic safety measures | Explosion-proof or dust-ignition-proof construction |
| Installation Environment | Suitable for control rooms or safe zones managing hazardous-area equipment | Designed for direct placement in hazardous zones |
| Regulatory Compliance | NFPA 496, ISA 12.12.01 | UL 1203, NFPA 70 (NEC) |
Industries That Require UL 698A and UL NNNY Panels
- Oil & Gas – Control panels for refineries, offshore platforms, and pipeline operations.
- Chemical Processing – Systems handling volatile chemicals and solvents.
- Pharmaceuticals – Manufacturing environments with explosive dust or vapors.
- Food & Beverage – Facilities where combustible dust (e.g., flour, sugar) poses ignition risks.
Choosing the Right Panel for Your Hazardous Location
- If your control panel will be placed in a non-hazardous area but controls hazardous equipment, a UL 698A panel is the right choice.
- If your control panel must be installed directly in a hazardous location, you need a UL NNNY-certified panel for explosion-proof safety.
Ensuring compliance with UL 698A and UL NNNY standards is crucial for protecting personnel, equipment, and facilities in hazardous environments. At I&I Soft Craft Solutions, we specialize in designing and building UL-certified control panels tailored to your specific industry needs.
Need guidance on selecting the right panel for your hazardous location? Contact I&I Soft Craft Solutions today to discuss your project!