IEC 61034 is an international standard that establishes the requirements for measurement and assessment of smoke density in cables. Developed by the International Electrotechnical Commission (IEC), it provides guidelines for testing the smoke generated from cables when they are exposed to fire conditions.
Importance of IEC 61034
The main objective of IEC 61034 is to ensure the safety and well-being of individuals in case of a fire. Smoke inhalation is one of the major causes of death during fires, and it is crucial to have cables that emit low levels of smoke. The standard specifies the test methods and performance criteria for measuring smoke density, allowing manufacturers to produce cables that comply with international safety standards.
Testing Methods
IEC 61034 outlines two main testing methods: the light transmittance method and the light scattering method. In the light transmittance method, a sample cable is placed in a chamber, and light is transmitted through the chamber filled with smoke. The intensity of transmitted light is measured, and the optical density is calculated. The light scattering method involves directing a beam of light into the smoke-filled chamber, and the scattered light is measured to determine the smoke density.
Performance Criteria
The standard sets specific limits for smoke density, considering different applications. For example, cables used in buildings and tunnels have stricter requirements compared to those used in industrial settings. The smoke density is evaluated based on specific parameters, such as specific optical density and light obscuration rate. Cables that meet these criteria are considered safe and compliant with the IEC 61034 standard.
Nina She