UL 510-2017 pdf free download

UL 510-2017 pdf free download.Polyvinyl Chloride , Polyethylene , and Rubber Insulating Tape.
and the top and front are to be open. The test specimen detailed in 6.4 is to be secured with its longitudinal axis vertical in the center of the enclosure. A flat horizontal layer of absorbent 10004 cotton 1/4 to 1 in (6 to 25 mm) thick is to cover the floor of the enclosure. The upper surface of the cotton is to be 9 to 9-1/2 in (229 to 241 mm) below point B, which is the point at which the tip of the blue inner cone of the test flame touches the specimen. This Is shown in Figure 6.1.
6.7 The fume hood or cabinet is to be a draft-free chamber having an air-tight, windowed sash, door, or other means for access and viewing. Each linear interior dimension of the chamber is to be at least 24 in or 610 mm. The actual dimensions are to result in an interior volume of the chamber of at least 140 ft3 or 4 m3, including the volume of the exhaust transition. The size of the exhaust transition, if any, is not specified. At least 70 ft3 or 2 m3 of this volume is to be above the area of the gas and specimen flames as space for the heat and smoke to accumulate and not influence the flames. The chamber volume at or below the level of the flames is not to contain obstructions to the natural flow of chamber air supplying oxygen to the flames.
6.8 The chamber is to have an air-tight glove box for arm-and-hand access to the apparatus or other means for adjusting the apparatus while the access is completely closed. The interior of the chamber is to be visible without obstruction while the access is closed. The chamber is to be titled with an exhaust blower for pulling smoke and fumes out of the test area after the test. A tight-sealing damper is to be located between the chamber and the blower to prevent drafts while the blower is not operating. The exhaust blower is not to be operated during the test or during calibration, Immediately after each calibration and each test, the damper is to be opened and the blower is to be operated to purge the chamber of all smoke and fumes.
6.9 The flame test is to be conducted with a laboratory type burner having a tube with a length of 100
±10 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 the Standard Specification for Laboratory
Burner Used for Small-Scale Burning Tests on Plastic Materials, ASTM D5025. The use of technical grade
methane gas (minimum 98% pure) with regulator and meter for uniform gas flow is to be used.
Note: Natural gas having a heat content of approximately 37 ±1 MJ/m3 at 25°C has been found to provide similar results. However, technical grade methane shall be used in case of dispute.
6.10 A wedge (acceptable dimensions are shown in Figure 6.2) to which the base of the burner can be secured is to be provided for tilting the barrel 20° from the vertical while the longitudinal axis of the barrel remains in a vertical plane. The burner is to be secured to the wedge and the assembly is to be placed on an adjustable support jig. A layer of absorbent 100% cotton 1/4 to 1 in (6 to 25 mm) thick is to be placed on the wedge and around the base of the burner. The jig is to be adjusted toward one side or the other of the enclosure to place the longitudinal axis of the barrel in the vertical plane that contains the longitudinal axis of the specimen. The plane is to be parallel to the sides of the enclosure. The jig is also to be adjusted toward the rear or front of the enclosure to position the point A, which is the intersection of the longitudinal axis of the barrel with the plane of the tip of the barrel, 1-1/2 in (38 mm) from the point B at which the extended longitudinal axis of the barrel meets the outer surface of the specimen. Point B is the point at which the tip of the blue inner cone is to touch the center of the front of the specimen.UL 510-2017 pdf free download.