What is UL 698

UL 698 is a widely recognized standard in the field of industrial control panels. It sets forth the requirements for construction, performance, and safety of these panels used in hazardous locations. In this article, we will explore the key aspects of UL 698 and its significance in the industry.

Construction and Design

The construction and design of UL 698 compliant control panels are crucial to ensure the safety of personnel and protection against potential risks. These panels must be robust, durable, and constructed with materials that can withstand the harsh conditions present in hazardous locations. They should also be designed to prevent the release of flames, sparks, or excessive heat that could ignite surrounding combustible materials.

Additionally, UL 698 mandates the use of specific types of components, such as explosion-proof enclosures, intrinsically safe barriers, and sealed connectors, to minimize the risk of ignition. The wiring inside the panel must be properly insulated and protected to prevent short circuits or electrical discharge.

Performance and Testing

UL 698 requires control panels to meet specific performance criteria to ensure reliable operation in hazardous environments. These panels undergo rigorous testing to verify their effectiveness in preventing explosions or fires.

One of the key performance tests is the ability to withstand excessive temperature rise. This test determines whether the panel can effectively dissipate heat and prevent overheating, which could lead to equipment failure or ignition of flammable substances. Control panels must also demonstrate resistance to environmental factors such as humidity, vibration, and corrosion.

Furthermore, UL 698 mandates that control panels be subjected to performance tests under abnormal operating conditions, such as overvoltage or excessive current. These tests evaluate the panel's ability to handle unexpected situations without compromising safety or reliability.

Safety and Compliance

UL 698 places great emphasis on safety and compliance with applicable regulations and standards. Control panel manufacturers must comply with specific requirements outlined in the UL standard and ensure that their products are properly labeled and marked. This includes providing clear instructions for installation, operation, and maintenance.

Moreover, UL 698 requires periodic inspections and audits to verify ongoing compliance with the standard. It is essential for businesses to regularly assess their control panels to identify any potential issues or non-compliance and take corrective actions promptly.

In conclusion, UL 698 plays a critical role in ensuring the safe and reliable operation of control panels used in hazardous locations. Compliance with this standard provides assurance to manufacturers, installers, and end-users that these panels meet stringent requirements for construction, performance, and safety.