1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNovember 13, 20071SUBJECT 2269OUTLINE OF INVESTIGATIONFOROPTICAL FIBER/COMMUNICATIONS/SIGNALING/COAXIAL CABLE OUTLETBOXESIssue Number: 2NOVEMBER 13, 2007Summary of TopicsThis second issue of the
2、Outline of Investigation for Optical Fiber/Communications/Signaling/Coaxial Cable Outlet Boxes is issued toinclude new Annex A, Tests on Alternate Corrosion Protection Systems.The UL Foreword is no longer located within the UL Outline of Investigation. Forinformation concerning the use and applicati
3、on of the requirements contained inthis Outline of Investigation, the current version of the UL Foreword is located onULStandardsInfoNet at: http:/ 2007 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 13,
4、 2007SUBJECT 22692No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Units of Measurement .43 References .4CONSTRUCTION4 Materials .44.1 Metal boxes, brackets and frames 44.2 Nonmetallic boxes,
5、brackets and frames 55 Corrosion Protection .5PERFORMANCE6 Corrosion Protection .67 Mold Stress 7MARKINGS8 Details .89 Maker .8Annex A (normative) Tests on Alternate Corrosion Protection Systems (See 5.7.)A1 General .A1A2 Air-Oven Conditioning Exposure .A2A3 Resistance to Salt-Spray (Fog) Test A2A4
6、Resistance to Moist Carbon Dioxide-Sulfur Dioxide-Air Test .A3A5 Resistance to Ultraviolet Light and Water Test .A3NOVEMBER 13, 2007 SUBJECT 2269 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover
7、outlet boxes, mounting brackets and frames designed for use with a coverplate for optical fiber/communications/signaling/coaxial cable for use in Class II circuits or communicationcircuits to be installed in accordance with the National Electrical Code, ANSI/NFPA 70.1.2 This Outline of Investigation
8、 does not apply to:a) Metallic or nonmetallic outlet boxes, flush-device boxes, extension rings, outlet boxes covers,orb) Cover plates and associated gaskets for flush-mounted wiring devices to be employed aspart of an electrical enclosure in accordance with the National Electrical Code, ANSI/NFPA 7
9、0.2 Units of Measurement2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.3 References3.1 Any undated reference to a code or standard appearing in the requirements of this Outline ofInvestigation shall be interpreted as referri
10、ng to the latest edition of that code or standard.CONSTRUCTION4 Materials4.1 Metal boxes, brackets and frames4.1.1 General4.1.1.1 The material thickness shall not be less than 0.030 in (0.76 mm) for ferrous metal (includingstainless steel) or 0.040 in (1.0 mm) for nonferrous metal.NOVEMBER 13, 2007S
11、UBJECT 22694UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4.2 Nonmetallic boxes, brackets and frames4.2.1 Flammability classification4.2.1.1 Materials shall have a minimum flammability classification of HB, as determined in accordancewith th
12、e Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL94.4.2.2 Relative thermal index4.2.2.1 A polymeric material that is used for a box, bracket and frame shall have a relative thermal indexelectrical of 50C (122F), mechanical with impact of 50C, and mech
13、anical without impact of 50Cminimum. The relative thermal index is to be determined in accordance with the method for relativethermal index based upon long-term thermal-aging programs described in the Standard for PolymericMaterials Long Term Property Evaluations, UL 746B and the Standard for the Ev
14、aluation of Propertiesof Polymeric Materials, CAN/CSA-C22.2 No. 0.17.5 Corrosion Protection5.1 All surfaces of all attached metal parts of a box, bracket and frame, including screws, shall beprotected against corrosion unless the metal is inherently resistant to corrosion.5.2 The thickness of a zinc
15、 coating on the ferrous metal box, bracket and frame shall not be less thanspecified in Table 5.1. If the bracket and frame can be reversed during installation, both sides shall beconsidered as being the outside.Table 5.1Thickness of coatingMaterialMinimum thickness of coating in (mm)Intended for as
16、semblyOutside of box, bracket and frame Inside of box, bracket and frameSheet steel 0.0005 (0.013) 0.00015 (0.0038)Cast iron, includingmalleable iron 0.00015 (0.0038) 0.00015 (0.0038)5.3 With reference to 5.1, cut edges and punched holes in a surface formed from galvanized stock arenot required to b
17、e so protected.5.4 With reference to 5.1, stainless steel having a chromium content of not less than 16 percent is notrequired to be so protected.5.5 The thickness of the coating on a screw is not specified, but the presence of a coating is to bedetermined by visual inspection.5.6 With reference to
18、5.1, spot or projection welds are not required to be protected, other than by aprotective coating, as determined by visual inspection.NOVEMBER 13, 2007 SUBJECT 2269 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5.7 An alternate corrosion pr
19、otection system shall be evaluated in accordance with Annex A.PERFORMANCE6 Corrosion Protection6.1 The test described in 6.2 6.9 is to be used to determine the thickness of zinc coatings on threesamples. The test is only to be conducted when a required coating thickness is specified.6.2 The solution
20、 to be used for the test is to be made from distilled water and is to contain 200 grams perliter of reagent grade chromic acid (CrO3); and 50 grams per liter of reagent grade concentrated sulfuricacid (H2SO4). The latter is equivalent to 27 milliliters per liter of reagent grade concentrated sulfuri
21、c acid,specific gravity 1.84, containing 96 percent of H2SO4.6.3 The test solution is to be contained in a glass vessel such as a separatory funnel with the outletequipped with a stopcock and a capillary tube having an inside bore of 0.025 in (0.64 mm) and a lengthof 5.5 in (140 mm). The lower end o
22、f the capillary tube is tapered to form a tip, the drops from which areabout 0.05 mL each. To preserve an effectively constant level, a small glass tube is inserted in the top ofthe funnel through a rubber stopper and its position is to be adjusted so that, when the stopcock is open,the rate of drop
23、ping is 100 5 drops per min. An additional stopcock may be used in place of the glasstube to control the rate of dropping.6.4 The three samples and the test solution are to be kept in the test room long enough to acquire thetemperature of the room, which is to be noted and recorded. The test is to b
24、e conducted at a roomtemperature of 21 32C (70 90F).6.5 Each sample is to be thoroughly cleaned before testing. All grease, lacquer, paint, and othernonmetallic coatings are to be removed completely by means of solvents. Samples are then to bethoroughly rinsed in water and dried with clean cheeseclo
25、th. Care is to be exercised to avoid contact ofthe cleaned surface with the hands or any foreign material.6.6 The sample to be tested is to be supported 0.7 1.0 in (18 25 mm) below the orifice, so that thedrops of solution strike the point to be tested and run off quickly. The surface to be tested s
26、hould beinclined about 45 degrees from horizontal.6.7 After cleaning, the sample to be tested is to be put in place under the orifice. The stopcock is to beopened and the time in seconds is to be measured with a stop watch until the dropping solution dissolvesoff the protective metallic coating, exp
27、osing the base metal. The end point is the first appearance of thebase metal recognizable by a change in color at that point.6.8 Each sample of a test lot is to be subjected to the test at three or more points, excluding cut,stenciled, and threaded surfaces, on the inside surface and at an equal num
28、ber of points on the outsidesurface, at places where the metallic coating may be expected to be the thinnest. On parts made fromprecoated sheets, a bend or the like that is subjected to the greatest deformation is likely to have thincoatings.NOVEMBER 13, 2007SUBJECT 22696UL COPYRIGHTED MATERIAL NOT
29、AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.9 To calculate the thickness in inches (mm) of the coating being tested, select from Table 6.1 thethickness factor appropriate for the temperature at which the test was conducted and multiply by the timein seconds require
30、d to expose the base metal as measured in 6.7.Table 6.1Coating thickness factorsTemperature, DegreesThickness factors, 0.00001 in (0.0003mm) per sZincF (C) platings70 (21.1) 0.98071 (21.7) 0.99072 (22.2) 1.00073 (22.8) 1.01074 (23.3) 1.01575 (23.9) 1.02576 (24.4) 1.03377 (25.0) 1.04278 (25.6) 1.0507
31、9 (26.1) 1.06080 (26.7) 1.07081 (27.2) 1.08082 (27.8) 1.08583 (28.3) 1.09584 (28.9) 1.10085 (29.4) 1.11086 (30.0) 1.12087 (30.6) 1.13088 (31.1) 1.14189 (31.7) 1.15090 (32.2) 1.1607 Mold Stress7.1 There shall not be a change in any dimension greater than 10 percent for a box, bracket and frameand no
32、openings greater than 1/16 in (1.6 mm) between a box and the plane across the open face of thebox when the box is conditioned as described in 7.2.7.2 Six samples of each mold configuration and each thermoplastic material used are to be conditionedfor7hatatemperature of not less than 90C (194F) in an
33、 air-circulating oven. Following removal fromthe oven and after the samples have cooled to room temperature, they are to be examined to determinewhether they comply with the requirements in 7.1.NOVEMBER 13, 2007 SUBJECT 2269 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBU
34、TION WITHOUT PERMISSION FROM ULMARKINGS8 Details8.1 All markings shall be legible. All product markings shall be permanent and visible after the product isinstalled. The following types of markings or the equivalent are considered permanent:a) Etched;b) Molded;c) Die stamped;d) Paint stenciled; ore)
35、 Indelibly stampedon a pressure sensitive label secured by adhesive and complying with the Standard for Marking andLabeling Systems, UL 969.8.2 A box, bracket and frame shall each be plainly marked with the manufacturers name, trademark, orother descriptive marking by which the organization responsi
36、ble for the product may be identified and, ifpracticable, with a catalog number or an equivalent designation. The catalog number or an equivalentdesignation, if not marked on the product, shall appear on the carton or other container in which theproduct is packaged. The marking on a box shall be loc
37、ated on the inside surface of the box.8.3 A required marking shall not be on a removable part of a box, bracket and frame unless it isduplicated on at least one other part.8.4 A box or bracket and frame shall be marked with the following: “Low Voltage Class 2 Use Only” onthe device or be identifiabl
38、e by a unique characteristic such as color.9 Maker9.1 When the organization responsible for the box, bracket, and frame produces outlet boxes, brackets,and frames in only one factory, the factory is not required to be identified on the product.9.2 When the organization responsible for the box, brack
39、et, and frame produces outlet boxes, brackets,and frames in more than one factory, all of the boxes, brackets, and frames that are produced by or forthat organization shall be identified as the product of a particular factory. The factory identification shallbe permanent and shall consist of a lette
40、r or symbol indented into or embossed on the outer surface ofthe box, bracket and frame. The absence of this marking may be used to identify one factory. Themeaning of each identification shall be made available.NOVEMBER 13, 2007SUBJECT 22698UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
41、CTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAnnex A(normative)Tests on Alternate Corrosion Protection Systems(See 5.7.)A1 GeneralA1.1 A coating, other than zinc plating, that is not intended for use in wet locations shall comply with A3.Sample preparation and conditioning shall be in accordance w
42、ith A1.3 A2.1.A1.2 A coating, other than zinc plating, that is intended for use in wet locations shall comply with A3 A5. Sample preparation and conditioning shall be in accordance with A1.3 A2.1. The resistance toultraviolet light and water exposure (Section A5) is only applicable for painted or po
43、lymeric coatings.A1.3 For a corrosion protection system intended for use in wet locations, a minimum of 50 samples ofthe finished product that is representative of an alternative corrosion protection system and has maximumsignificant surface area, or, where appropriate for the system under investiga
44、tion, steel panels measuring4 by 6 in (100 by 150 mm) of any thickness, shall be provided. A minimum of 30 samples shall be tested.For corrosion protection systems not intended for use in wet locations, a minimum of 20 samples shall beprovided. A minimum of 12 samples shall be tested. The additional
45、 samples shall be used in case ofdamage to the original samples during preparation or handling.A1.4 The edges or unprotected surfaces of all panels or finished products shall be covered withmoisture-resistant tape or compound. For painted coatings, half of the samples to be exposed shall bescribed i
46、n accordance with Standard Test Method for Evaluation of Painted or Coated SpecimensSubjected to Corrosive Environments, ASTM D 1654. The samples shall be free of dirt or foreign matter.Samples shall be suitably cleaned. The cleaning method shall be optional depending on the nature of thesurface and
47、 the contaminants. Care should be taken that samples are not re-contaminated after cleaningby excessive or careless handling. The coating thickness of each sample shall be measured prior toexposure to the test environments.A1.5 For identification of compounds, a nonmetallic material used as an alter
48、nate corrosion-resistant shallbe subjected to the infrared spectroscopy (IR), thermogravimetric analysis (TGA), and differentialscanning calorimetry (DSC) tests specified in the standard for polymeric materials. See the Standard forPolymeric Materials Short Term Property Evaluations, UL 746A.NOVEMBE
49、R 13, 2007 SUBJECT 2269 A1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULA2 Air-Oven Conditioning ExposureA2.1 Not less than six unscribed, and where appropriate, six scribed samples (see A1.4) of each systemshall be conditioned for 240 h at a temperature of 87 1C (189 2F) in an air-circulating oven that hasbeen preheated at full draft. These samples shall be used for Sections A3 and A4.A3 Resistance to Salt-Spray (Fog) TestA3.1 A minimum
