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Jump To A Service: Understanding UL300SummaryFire test standard UL 300 has been a major factor in significant changes in how commercial cooking operations are protected from fire. This report looks at the background of UL 300 and changes in related NFPA National Fire Code documents. The dilemma of what to do about existing fire protection systems is also discussed. IntroductionIn 1998, a revolution in the fire protection of commercial cooking operations occurred. Several key fire protection standards were revised. While protection requirements for new installations seemed clear, fire protection professionals found themselves in a quandary over existing installations. The changes raised doubts about the ability of existing fire protection systems to provide adequate protection. Questions arose as to which systems needed to be upgraded, the length of transition time that should be allowed, and the difference in loss exposure between existing protection and new criteria. A driving force behind this fire protection revolution is one fire test standard developed by Underwriters Laboratories, Inc. (UL). First issued in 1992, UL 300, Standard for Safety for Fire Testing of Fire Extinguishing Systems for Protection of Restaurant Cooking Areas, affects how kitchen fire protection systems are tested. The revised standard is intended to provide test conditions which more closely resemble the hazards faced in “real world” fire situations. Indications that an existing protection system is not UL 300 compliant include:
To date, no dry chemical system has been listed under UL 300. However, existing dry chemical systems (separate from the system protecting the cooking appliance) may still be used for plenum and duct protection. UL 300 requires that multiple appliances be covered individually unless a specific listing is in the manufacturer’s design, installation, and maintenance manual and the manufacturer must specifically test this arrangement under the UL 300 test standard.
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