Protective coatings are covered under the following categories and corresponding CCNs at UL based on the type of coating and end-use application.

Coatings, Organic, for Steel Enclosures of Outdoor-use Electrical Equipment (DTOV2) covers organic coatings (e.g. paints, enamels, lacquers, and varnishes) intended for use as protection against atmospheric corrosion of steel enclosures in outdoor-use environments. The basic standard used to investigate products in this category is ANSI/UL 1332, Organic Coatings for Steel Enclosures for Outdoor Use Electrical Equipment.

Coatings, Metallic (DTHW2) covers metallic coatings (e.g. zinc, zinc-iron, aluminum-zinc, zinc-aluminum-magnesium and zinc-nickel alloy) and the steel substrates to which they are applied. The basic standard used to investigate products in this category is ASTM A653/A653M, “Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process.” Additional standards may be used to investigate other metallic coating types/designations if found appropriate. 

Coatings, Organic, for Use on Metal-enclosed Switchgear Assemblies (DTZI2) covers organic coatings intended for use as protection against corrosion of metal-enclosed, low-voltage-power circuit-breaker switchgears. The corrosion protection/coating (paint) qualification test requirements for these assemblies are outlined in UL 1558, “Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear,” and ANSI/IEEE C37.20.1, “IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear.”

Product Submittal

To submit a protective coating for investigation, please contact Customer Service to request a quote or complete the online Request for Quote form. Customer Service is available worldwide to help you with the product submittal process or any other inquiries about protective coatings. UL recommends completing a submission form when submitting your request.