What is UL 84?

UL 84, also known as the Standard for Safety for Electric Signs, is a widely recognized standard developed by Underwriters Laboratories (UL). This technical article aims to provide a thorough understanding of UL 84 and its significance in ensuring electrical safety in electric signs.

The Purpose of UL 84

UL 84 sets forth requirements for the construction, performance, and testing of electric signs. Its primary purpose is to evaluate the safety and reliability of signs that rely on electrical components such as lighting elements, transformers, and power supplies. By adhering to the stipulations of UL 84, manufacturers can ensure that their products meet stringent safety standards and minimize the risk of electrical hazards.

Key Requirements of UL 84

The standard outlines several key requirements that electric signs must meet to be considered UL 84 compliant. These include specific guidelines for grounding and bonding, insulation, wiring methods, and the use of compatible components. It also covers aspects such as labeling, marking, and installation instructions. Adherence to these requirements not only guarantees safety but also facilitates proper installation, maintenance, and inspection of electric signs.

Testing and Certification

To obtain UL 84 certification, manufacturers submit their electric sign products to rigorous testing conducted by certified laboratories. These tests assess factors such as flammability, electrical insulation integrity, temperature resistance, and durability. If the product successfully meets all the criteria outlined in UL 84, it receives the official UL mark, indicating compliance with safety standards. This certification provides assurance to consumers and authorities that the electric sign has undergone thorough evaluation and is safe for use.