Executing FCC Section 2933 Change in Identification Filings
Section 2933 filings transfer FCC equipment authorization to a new grantee code without retesting, provided hardware and circuitry remain unchanged.
UL 969
Meaning
Safety standards for marking and labeling systems establish the durability requirements for adhesive labels used on electrical appliances and industrial equipment. Under this standard, labels must remain legible and attached to the product when exposed to environmental hazards such as heat, humidity, and chemical solvents. Compliance with UL 969 is verified by testing the label assembly on representative substrate surfaces before product certification.
Test Protocol
Label samples undergo a series of exposure cycles that include high temperatures, water immersion, and mechanical scraping to evaluate their adhesion and legibility. This evaluation for UL 969 compliance ensures that critical safety instructions, warning symbols, and electrical ratings remain intact over the expected lifespan of the device. The test sequence is performed by independent laboratories that specialize in safety certifications.
Substrate Compatibility
The performance of an adhesive depends on the surface energy of the plastic or metal housing to which it is applied. Labels designed to meet UL 969 are certified for specific substrate categories, such as polycarbonate or powder-coated steel, and a label approved for one material cannot be used on another without additional testing. This classification prevents the labeling from peeling off under field conditions.
Production Integration
Hardware manufacturing processes must use only approved ribbon and label material combinations that are tracked in the factory documentation. Quality audits verify that the installed markings match the certified bills of materials to maintain the safety listing of the finished assembly.