FT-6 is a CSA designation for the Plenum or Mineral Insulated flame test used to evaluate cable performance in air handling spaces.
FT-6 is a flame performance classification established by the Canadian Standards Association for cables intended for installation in plenum or air handling spaces. The FT-6 test evaluates flame spread and smoke characteristics under conditions that simulate airflow environments found above suspended ceilings or below raised floors. These spaces are commonly used for environmental air circulation in commercial and industrial buildings.
The FT-6 test subjects cable samples to a controlled flame source within a test chamber that incorporates forced air movement. This configuration is designed to replicate the way fire and smoke could travel through building air plenums. To achieve an FT-6 rating, the cable must demonstrate limited flame propagation and restricted smoke development under the specified test conditions.
In commercial and industrial facilities, air handling spaces present unique fire safety concerns. Because these areas are connected to HVAC systems, smoke and combustion byproducts can be distributed throughout a structure if materials are not properly evaluated. FT-6 rated cables are engineered with insulation and jacket materials formulated to minimize flame spread and reduce smoke generation in these critical environments.
FT-6 is considered one of the more stringent CSA flame tests due to the airflow component of the evaluation. It is commonly associated with plenum rated cable constructions in Canadian installations. While mineral insulated cables may also meet FT-6 criteria, the designation itself refers to the test method rather than a specific cable construction type.
When specifying cable for Canadian commercial projects, verifying FT-6 compliance ensures that wiring installed in plenum spaces aligns with applicable fire performance requirements. The designation helps engineers and project managers select products suitable for air handling areas without relying solely on general purpose flame ratings.
Overall, FT-6 represents a high level flame performance classification under CSA standards, supporting enhanced fire safety in commercial and industrial plenum installations.
Canadian Standards Association