1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJANUARY 26, 20151UL 509Outline of Investigation for Bus Drop CableIssue Number: 2January 26, 2015Summary of TopicsThis outline is being revised to make grounding conductors optional.COPYRIGHT 201
2、5 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJANUARY 26, 2015UL 5092No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODU
3、CTION1 Scope .4CONSTRUCTION2 Assembly 43 Circuit and Grounding Conductors 44 Overall Jacket 5MARKINGS5 On the Cable .56 On the Tag, Reel, or Carton 6TEST PROGRAM7 Details .6JANUARY 26, 2015 UL 509 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM
4、 ULINTRODUCTION1 Scope1.1 This Outline covers bus drop cable for use as described in Section 368.56 (B) and other applicableparts of the National Electrical Code (NEC), NFPA 70.CONSTRUCTION2 Assembly2.1 The cable shall consist of 3 or 4 insulated circuit conductors of the same type and size cabledto
5、gether with an optional grounding conductor, plus fillers as necessary to make the finished cable roundand firm, and an overall jacket of material rated for the dry temperature rating of the insulated conductors.All conductors shall be stranded. The cable shall not contain both thermoplastic and the
6、rmoset materials.3 Circuit and Grounding Conductors3.1 The circuit conductors and any optional grounding conductor that is insulated shall be unmarked TypeTW, THW, THW-2, THHN, THWN, THWN-2 as described in the Standard for Thermoplastic-InsulatedWires and Cables, UL 83 or Type XHHW, XHHW-2, RHW, RHW
7、-2, or RHH wires as described in theStandard for Thermoset-Insulated Wires and Cables, UL 44. All conductors shall be stranded and in sizes14 4/0 AWG if of copper and in sizes 12 4/0 AWG if of aluminum or copper-clad aluminum.3.2 The optional grounding conductor shall be bare or fully insulated and
8、of the same type as the circuitconductors and shall not be located in the center of the cable core. A bare grounding conductor shall bein one or more sections that are cabled with the circuit conductors. The grounding conductor shall not besmaller in size than indicated in Table 3.1. The individual
9、members of a sectioned grounding conductorshall not be smaller than 18 AWG.Table 3.1Minimum size of optional grounding conductorSize of circuit conductors, AWG Minimum size of grounding conductor, AWGCopper circuit conductors and grounding conductor14 1412 12106 1042 81 4/0 6Aluminum or copper-clad
10、aluminum circuit conductors and grounding conductor12 12104 83 1/0 62/0 4/0 4JANUARY 26, 2015UL 5094UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4 Overall Jacket4.1 The average and point thicknesses of the overall jacket shall not be less t
11、han indicated in Table 4.1.Table 4.1Minimum jacket thicknessesSize of circuitconductors, AWGMinimum average thickness, mils Minimum thickness at any point, mils1410 45 368 6 60 484 2 80 641 4/0 95 76MARKINGS5 On the Cable5.1 The surface markings shall be as follows:a) Identification of the organizat
12、ion responsible for the product.b) Bus Drop Cable.c) AWG size of the circuit conductors.d) The temperature ratings (wet and dry) if higher than 60C.e) 600 V or 600 volts.f) Outdoor if the insulated circuit and grounding conductors are wet-rated and themanufacturer employs a jacketing compound comply
13、ing with a 720-h sunlight resistance test.g) Oil Resistant 60C or Oil Resistant 75C if applicable.JANUARY 26, 2015 UL 509 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6 On the Tag, Reel, or Carton6.1 The tag markings shall be as follows:a)
14、 The maximum working potential (600 volts).b) Identification of the organization responsible for the product.c) The number of circuit conductors and their AWG size.d) The date of manufacture by month and year.e) The colors and ply of the manufacturers assigned marker threads, if these threads are us
15、ed.f) The designation Bus Drop Cable.g) The designation Oil-Resistant or Outdoor if the cable complies with the applicable testsand this rating is identified on the cable.h) For cable containing aluminum or copper-clad aluminum conductors: Wherever the AWGsize of the conductors appears, the size sha
16、ll be followed as applicable by the word aluminumor the abbreviation AL or the words copper-clad aluminum or the abbreviation CU-CLADAL.TEST PROGRAM7 Details7.1 INSULATED CONDUCTORS Thermoplastic-insulated circuit and grounding conductors shallcomply with the Standard for Thermoplastic-Insulated Wir
17、es and Cables, UL 83. Thermoset-insulatedcircuit and grounding conductors shall comply with the Standard for Thermoset-Insulated Wires andCables, UL 44.7.2 AVERAGE AND POINT THICKNESSES OF OVERALL JACKET Values per Table 4.1 whendetermined in accordance with the test as described in Thickness, in th
18、e Standard for Wire and Cable TestMethods, UL 2556.7.3 PHYSICAL PROPERTIES OF JACKET Values for the material as specified in the Standard forFlexible Cords and Cables, UL 62, for the dry temperature rating of the insulated conductors.7.4 CABLE FLAME TEST Method as described in the Cable Flame Test,
19、in the Standard forThicknesses of Jacket on Thermoplastic- and Thermoset-Insulated Wires and Cables, UL 1581.7.5 SUNLIGHT RESISTANCE (OPTIONAL) Eighty percent retention of the average tensile strengthand elongation of the unaged specimens after 720 hours of conditioning when tested in accordance wit
20、hthe test Weather (sunlight) resistance, as described in the Standard for Wire and Cable Test Methods, UL2556.JANUARY 26, 2015UL 5096UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7.6 OIL RESISTANCE (OPTIONAL) Values for 60C or 75C oil resistance of the jacket material asspecified in Standard for Thermoset-Insulated Wires and Cables, UL 44.JANUARY 26, 2015 UL 509 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJANUARY 26, 2015UL 5098No Text on This Page
