UL 94-2009 pdf download – Tests for Flammability of Plastic Materials for Parts in Devices and Appliances.
5 Apparatus 5.1 Laboratory Fume Hood – The laboratory fume hood chamber shall have an inside volume of at least 0.5 m 3 . The chamber shall permit observation of tests in progress and shall be draft free, while allowing a normal thermal circulation of air past the test specimen during burning. The inside surfaces of the chamber shall be of a dark color. When a light meter, facing towards the rear of the chamber, is positioned in place of the test specimen, the recorded light level shall be less than 20 lx. For safety and convenience, it is desirable that the enclosure (which can be completely closed) be fitted with an extraction device, such as an exhaust fan, to remove products of combustion which may be toxic. The extraction device shall be turned off during the test and turned on immediately after the test to remove the fire effluents. A positive closing damper may be needed. Note 1 : The amount of oxygen available to support combustion is important for the conduct of these flame tests. For tests conducted by this method when burning times are prolonged, chamber sizes less than 1 m 3 do not consistently provide accurate results. Note 2: Placing a mirror in the chamber, which provides a rear view of the test specimen, has been found useful. 5.1 revised June 2, 2006 5.2 Laboratory Burner – A laboratory type burner having a tube with a length of 1 00 ±1 0 mm and an inside diameter of 9.5 ±0.3 mm. The barrel is not to be equipped with an end attachment, such as a stabilizer. The burner shall be in compliance with ASTM D5025. Note: Method A of IEC TS60695-1 1 -4 and Ignition Source P/PF2 of ISO 1 0093 are technically equivalent to ASTM D 5025 5.2 revised June 2, 2006
5.1 6 Specimen Mandrel Form – Made from 1 2.7 ±0.5 mm diameter rod with a minimum 250 mm length. (Used for the test procedure in Thin Material Burning Test; VTM-0, VTM-1 , VTM-2… Section 1 1 only.) 5.1 6 revised June 2, 2006 5.1 7 Tape – Pressure-Sensitive Adhesive. (Used for the test procedure in Thin Material Burning Test; VTM-0, VTM-1 , VTM-2… Section 1 1 only.) 5.1 7 revised July 29, 1 997 5.1 8 Support-Gauze – A wire cloth of plain weave, low carbon, plain steel or stainless steel, approximately 21 5 mm long by 75 mm wide having 1 3 mm of its length bent to form a right angle at one end. It is to consist of 6.4 mm mesh gauze constructed of 0.88 ±0.05 mm diameter steel wire. The cloth mesh and wire diameter are to be determined as described in ASTM E437. (Used for the test procedure in Horizontal Burning Foamed Material Test; HBF, HF-1 , or HF-2… Section 1 2 only.) 5.1 8 revised July 29, 1 997 5.1 9 Foam Support Fixture – A metal support fixture capable of holding the support gauze in 5.1 8 including height adjustment to allow for burner height variations. See Figure 1 2.1 . (Used for the test procedure in Horizontal Burning Foamed Material Test; HBF, HF-1 , or HF-2… Section 1 2 only.) 5.1 9 revised July 29, 1 997 5.20 Manometer/Pressure Gage – A gage capable of measuring to 200 mm of water, with increments of 5 mm.