这是二氧化碳灭火器的通用UL和ULC标准。它是CAN/ULC-S503的第四版，以及ANSI/UL 154的第九版。这些要求包括便携式二氧化碳灭火器的结构和性能，不包括火灾试验期间的性能。二氧化碳灭火器的使用应符合便携式灭火器标准、NFPA 10和加拿大国家消防规范。二氧化碳灭火器火灾试验期间的性能要求在灭火器额定值和火灾试验的两国标准ANSI/UL 711/CAN/ULC-S508中规定。

This is the common UL and ULC Standard for Carbon-Dioxide Fire Extinguishers. It is the Fourth edition of CAN/ULC-S503, and the Ninth edition of ANSI/UL 154. These requirements cover the construction and performance, exclusive of performance during fire tests, of portable carbon-dioxide fire extinguishers. Carbon-dioxide fire extinguishers are intended to be utilized in accordance with the Standard for Portable Fire Extinguishers, NFPA 10 and the National Fire Code of Canada. The requirements for performance during fire testing of carbon-dioxide fire extinguishers are specified in the Binational Standard for Rating and Fire Testing of Fire Extinguishers, ANSI/UL 711/CAN/ULC-S508.