UL 711:2018 pdf download.Rating and Fire Testing of Fire Extinguishers.
6 General
6.1 Wood cflb tire tests for Rating-Class up to and including 10-A, wood panel fire tests and flammable bquld tire tests for Rating-Class up to and including 20-B are to be conducted in an essentially draft-tree room having a volume large enough to assure a supply of oxygen and visibility for the duration of the test. A room having a ceiling height of approximately 7.5 m (24 It). a volume of at least 1600 in3 (57.000 ft). and a total vent area of at least 4.5 m2 (50 ft2) meets the intent of this requirement. The room Is to have a smoothly finished concrete floor. For a Rating-Class 20-A and larger, the tests are to be conducted outdoors under conditions of essentially still air (5 km/h (3 mph) or less] and no precipitation. Flammable-liquid fire tests for a Rating-Class up to and including 20-B are to be conducted in a large-volume, essentially draft-free room. For a Rating-Class exceeding 20-B the tests may be conducted outdoors, Outdoor tire tests are to be conducted under conditions of steady breeze (5 — 13 km/h (3 — 8 mph)] with gusts not greater that 16 km/h (10 mph) and no precipitation
6.2 All fire tests are to be conducted by expenenced personnel. The operator of the extinguisher is to be protected against heat by wearing a safety helmet with heat-resistant face guard. and heat resistant long coat and gloves. A self-contained breathing apparatus, or the equivalent, is recommended.
7 Class A extinguishers
7.1 General
7.1.1 A Class A fire extinguisher, under conditions of continuous discharge with all devices for controlling the flow of the extingtishing agent maintained in the position for maximum discharge, shall extinguish wood crib and wood panel test fires as designated in the following requirements for a given class and rating. A test fire is considered to be extinguished when II reaches a state that will not be subject to seif-reignition or continued smoldering under the conditions of test.
6.1 Wood cflb tire tests for Rating-Class up to and including 10-A, wood panel fire tests and flammable bquld tire tests for Rating-Class up to and including 20-B are to be conducted in an essentially draft-tree room having a volume large enough to assure a supply of oxygen and visibility for the duration of the test. A room having a ceiling height of approximately 7.5 m (24 It). a volume of at least 1600 in3 (57.000 ft). and a total vent area of at least 4.5 m2 (50 ft2) meets the intent of this requirement. The room Is to have a smoothly finished concrete floor. For a Rating-Class 20-A and larger, the tests are to be conducted outdoors under conditions of essentially still air (5 km/h (3 mph) or less] and no precipitation. Flammable-liquid fire tests for a Rating-Class up to and including 20-B are to be conducted in a large-volume, essentially draft-free room. For a Rating-Class exceeding 20-B the tests may be conducted outdoors, Outdoor tire tests are to be conducted under conditions of steady breeze (5 — 13 km/h (3 — 8 mph)] with gusts not greater that 16 km/h (10 mph) and no precipitation
6.2 All fire tests are to be conducted by expenenced personnel. The operator of the extinguisher is to be protected against heat by wearing a safety helmet with heat-resistant face guard. and heat resistant long coat and gloves. A self-contained breathing apparatus, or the equivalent, is recommended.
7 Class A extinguishers
7.1 General
7.1.1 A Class A fire extinguisher, under conditions of continuous discharge with all devices for controlling the flow of the extingtishing agent maintained in the position for maximum discharge, shall extinguish wood crib and wood panel test fires as designated in the following requirements for a given class and rating. A test fire is considered to be extinguished when II reaches a state that will not be subject to seif-reignition or continued smoldering under the conditions of test.
