1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSEPTEMBER 4, 20151UL 1493Outline of Investigation for Underground Low-Energy Circuit CableIssue Number: 6September 4, 2015Summary of TopicsThis Sixth issue of the Outline of Investigation for Und
2、erground Low-Energy Circuit Cable, UL 1493, is being issued to clarify the intended useand electrical ratings, and to add the optional mark for direct burial.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in
3、any way. All ofULs Outlines of Investigation and all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of UL.COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUT
4、ION WITHOUT PERMISSION FROM ULSEPTEMBER 4, 2015UL 14932No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Components 43 Units of Measurement .44 Undated References 5CONSTRUCTION5 Materials and W
5、orkmanship 56 General 56.1 Assembly 56.2 Conductors 56.3 Insulation 56.4 Jacket .9PERFORMANCE7 General 9MARKINGS8 General .109 Tag, Reel, or Carton Markings .11SEPTEMBER 4, 2015 UL 1493 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUC
6、TION1 Scope1.1 This Outline covers the requirements for single or multiple conductor cables intended for undergrounduse in accordance with the National Electrical Code (NEC), NFPA 70. The wire is rated 30 V or 150 V acor dc and 60, 75, or 90C. These cables are intended to be connected to a Class 2 o
7、r Class 3 powersource as defined by Tables 11(A) and 11(B) of the NEC.2 Components2.1 Except as indicated in 2.2, a component (including gaskets and polymeric materials) of a productcovered by this outline of investigation shall comply with the requirements for that component.2.2 A component is not
8、required to comply with a specific requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this outline of investigation, orb) Is superseded by a requirement in this outline of investigation.2.3 A component shall be used in a
9、ccordance with its rating established for the intended conditions ofuse.2.4 Specific components are incomplete in construction features or restricted in performance capabilities.Such components are intended for use only under limited conditions, such as certain temperatures notexceeding specified li
10、mits, and shall be used only under those specific conditions.3 Units of Measurement3.1 In addition to being stated in the inch/pound units that are customary in the USA, each of therequirements in this outline is also stated in units that make the requirement conveniently usable incountries employin
11、g the metric system (practical SI). Equivalent although not necessarily exactlyidentical results are to be expected from applying a requirement in USA or metric terms. Equipmentcalibrated in metric units is to be used when a requirement is applied in metric terms.SEPTEMBER 4, 2015UL 14934UL COPYRIGH
12、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4 Undated References4.1 Any undated reference to a code or standard appearing in the requirements of this outline ofinvestigation shall be interpreted as referring to the latest edition of that code or stan
13、dard.CONSTRUCTION5 Materials and Workmanship5.1 Only materials that are acceptable for the particular use shall be employed in a wire. Wires shall bemade and finished with the degree of uniformity and grade of workmanship that are practicable in awell-equipped factory.5.2 Each material used in a wir
14、e shall be compatible with all of the other materials used in the wire.6 General6.1 Assembly6.1.1 These cables consist of a single insulated conductor,24insulated conductors laid parallel withan interconnecting web, or 2 or more conductors in a multi-conductor, jacketed cable.6.2 Conductors6.2.1 Con
15、ductors shall be 22 8 AWG copper (tinned or bare), copper-clad aluminum or aluminum. Theconductors shall comply in size with the dimensions specified in the Table for Conductor Dimensions ofthe Reference Standard for Electrical Wires, Cables, and Flexible Cords, UL 1581, and shall meet the DCresista
16、nce values shown in the applicable table of the D-C Conductor Resistance clause under theConductors Section of UL 1581.6.3 Insulation6.3.1 The insulation material and properties shall comply with the requirements for a Class 3 cable asdescribed in the Standard for Power-Limited Circuit Cables, UL 13
17、. The insulation thickness shall complywith the requirements shown in Tables 6.1 6.3 based on construction.SEPTEMBER 4, 2015 UL 1493 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 6.1Thicknesses of integral insulation and jacket, and d
18、istance between conductors on 2-, 3-, or4-conductor flat, parallel cableCablesizes,AWGNominal thickness awayfrom tear area(s) (verticaldashed line through webor webs in Figure 6.1 )and outside point P or X(defined in Figure 6.2 )Minimum thickness atany point beforeseparation measuredoutside point P
19、or X(defined in Figure 6.2 )Minimum thickness atany point after separationMinimum distancebetween conductorsAa(Information only - nota requirement)BaCaDain mm in mm in mm in mm22 12 0.020 0.51 0.018 0.46 0.010 0.25 0.030 0.7611 8 0.030 0.76 0.027 0.69 0.013 0.33 0.047 1.19aDimensionsA-Dareillustrate
20、d in Figure 6.1.This is generated text for figtxt.Figure 6.1Integral flat cableSee Table 6.1 for dimensionsAD.SEPTEMBER 4, 2015UL 14936UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 6.2Definition of regions of valley slopes on which th
21、ickness measurements are not to be made inintegral flat cablesConstructions with a cross section having a definite point P at the outer end of each valley slope OP in each case is a straight linefrom the center O of a conductor to P on the same segment of the cross section. Thickness measurements ar
22、e not to be made onany valley slope.Constructions with a cross section not having a definite point to mark the outer end of each valley slope OT in each case is a straightline from the center O of a conductor to T, the point of tangency, on the adjacent segment of the cross section. Thicknessmeasure
23、ments are not to be made deeper on a valley slope than point X, which is the intersection of the line OT with the valleyslope. Thickness measurements are to be made on each slope segment TX.SEPTEMBER 4, 2015 UL 1493 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITH
24、OUT PERMISSION FROM ULTable 6.2Thicknesses of solid insulation (including any skin) in nonintegral round multiple-conductorcableConductorsize, AWGInsulation whose unaged tensile strength is less than 2000 lbf/in2or 13.79MN/m2PVC (1) with an unagedtensile strength of atleast 2000 lbf/in2or13.79 MN/m2
25、, and (2)with or without acoveringaof nylon (see3.3 of UL 13), PBT (see3.4 of UL 13), or similarthermoplastic materialor ECTFE, ETFE, FEP,HDPE, MFA, PFA, PTFE(TFE), PVDF, PVDFCopolymer, SemirigidPVC, PP, or XLPOCP or silicone rubberLDPE, PVC, or TPE (allwithout a nylon orsimilar covering)PVC with a
26、coveringaofnylon (see 3.3 of UL 13),PBT (see 3.4 of UL 13), orsimilar thermoplasticmaterial or TPE with acoveringbof nylon or XL(without a nylon orsimilar covering)AB C DMinimumacceptableaveragethicknessMinimumacceptablethicknessat anypointMinimumacceptableaveragethicknessMinimumacceptablethicknessa
27、t anypointMinimumacceptableaveragethicknessMinimumacceptablethickness atany pointMinimumacceptableaveragethicknessMinimumacceptablethickness atany pointinch22 15 0.015 0.013 0.015 0.013 0.009 0.008 0.009 0.00814 10 0.020 0.018 0.020 0.018 0.012 0.011 0.012 0.0119 8 0.030 0.027 0.030 0.027 0.015 0.01
28、3 0.015 0.013mm22 15 0.38 0.33 0.38 0.33 0.23 0.20 0.23 0.2014 10 0.51 0.46 0.51 0.46 0.30 0.28 0.30 0.289 8 0.76 0.69 0.76 0.69 0.38 0.33 0.38 0.33aMeasured by means of the micrometer microscope described in 7.3.2 of the Standard for Power-Limited Circuit Cables,UL 13, the minimum thickness at any
29、point of the nylon or similar covering shall not be less than 0.0020 in (2.0 mils) or0.050 mm.SEPTEMBER 4, 2015UL 14938UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 6.3Thickness of solid insulation (including any skin) on 22 8 AWG cond
30、uctors in single-conductorcableConductor size,AWG Insulation materialMinimum average thickness Minimum thickness at any pointinch mm inch mm2212CP,HDFRPE,LDFRPE,HDPE, LDPE,PP, PVC,SRPVC, TPE,XL, or XLPOWithout nyloncovering0.020 0.51 0.018 0.46With nylonaorsimilar cover0.015 0.38 0.013 0.33118Withou
31、t nyloncovering0.030 0.76 0.027 0.68With nylonaorsimilar cover0.020 0.51 0.018 0.462212ECTFE, ETFE, FEP, MFA, PFA,TFE, PVDF, or PVDF copolymer0.015 0.38 0.013 0.3311 8 0.020 0.51 0.018 0.46aMeasured by means of a micrometer microscope as described in 7.3.2 of the Standard for Power-Limited Circuit C
32、ables, UL13, the minimum thickness at any point of the nylon or similar covering shall not be less than 0.0040 in (4.0 mils) or 0.102mm.6.4 Jacket6.4.1 The jacket on a nonintegral, multiconductor jacketed construction shall comply with the thicknessrequirements for a jacket used on a Class 3 cable a
33、s described in the Standard for Power-Limited CircuitCables, UL 13.PERFORMANCE7 General7.1 The following tests shall be performed in accordance with, and comply with the requirements of themethods in the Standard for Power-Limited Circuit Cables, UL 13, for a Class 3 cable with a direct burialrating
34、, except where modified as noted below:a) Physical Properties,b) Continuity,c) Vertical Flame Test as described in the Reference Standard for Electrical Wires, Cables, andFlexible Cords, UL 1581 (for cables marked sunlight resistant),d) Dielectric Voltage-Withstand Test,e) Crushing Test for Cable Ma
35、rked for Direct Burial (Required for cables rated over 150V). Thistest is optional for cables rated 30 V.f) Sunlight Resistance Test, 720 hours (optional),g) Cold Bend Test of Insulation,h) Cold Bend Test of Complete Cable,i) Mechanical Water Absorption Test of Insulation in Direct-Burial Cable,SEPT
36、EMBER 4, 2015 UL 1493 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULj) Long-Term Insulation Resistance Test in Water (for cables marked wet location),k) Insulation Resistance Test at 60F,l) Shrinkback Test,m) Crushing Resistance Test of Ins
37、ulation,n) Durability Test of Ink Printing, ando) DC Resistance Test of Copper Conductors.MARKINGS8 General8.1 The following information shall be printed on the outer surface of the jacket at intervals not exceeding24 inches. Additional markings may be surfaced marked as long as they are not confusi
38、ng or misleading.a) Manufacturers identification.b) Conductor size and material if other than copper. Copper-clad aluminum shall be indicatedby one of the following designations: AL (CU-CLAD), ALUMINUM (COPPER-CLAD), CU-CLAD AL,orCOPPER-CLAD ALUMINUM. Aluminum conductors shall be marked“Aluminum” or
39、 “AL”.c) The words Underground Low-Energy Circuit Cable” or ULECC”.d) Temperature rating. Optional for cables rated 60C.e) Optional the words Sunlight Resistant” if the outermost layer complies with the 720-hourSunlight Resistance test.f) Optional the words 30C”, 40C”, 50C”, 60C”, or 70C” as applica
40、ble if the cablecomplies with the Cold Bend Test of Complete Cable described in 7.1(h).g) Voltage rating (indicate ac or dc). Optional for cables rated over 30 V.h) Optional Wet” or Wet Location” if the cable complies with the Long-Term InsulationResistance Test in Water described in 7.1(j).i) Optio
41、nal “Direct Burial” or “Dir Bur” for cables that are not marked “Sunlight Resistant”.SEPTEMBER 4, 2015UL 149310UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9 Tag, Reel, or Carton Markings9.1 A tag on which the following information is indic
42、ated plainly shall be tied to every shipping length offinished wire. However, if the wire is wound on a reel or coiled in a carton, the tag may be glued, tied,stapled, or otherwise acceptably attached to the reel or carton instead of to the wire, or the tag may beeliminated and the information print
43、ed or stencilled directly onto the reel or carton. Other information maybe added if it does not confuse or mislead. Each coil or reel of cable is plainly marked or tagged to showthe following:a) Manufacturers identification.b) Date of manufacturer by month and year.c) “Underground Low-Energy Circuit
44、 Cable” or ULECC”.d) Temperature rating. Optional for cables rated 60C.e) Voltage rating (indicate ac or dc). Optional for cables rated over 30 V.f) Conductor size and material if other than copper. Copper-clad aluminum shall be indicated byone of the following designations: AL (CU-CLAD), ALUMINUM (
45、COPPER-CLAD), CU-CLAD AL,orCOPPER-CLAD ALUMINUM. Aluminum conductors shall be marked“Aluminum” or “AL”.g) The manufacturers identifying thread marker if employed.h) Optional the words Sunlight Resistant” if the outermost layer complies with the 720-hourSunlight Resistance test.i) Optional the words
46、30C”, 40C”, 50C”, 60C”, or 70C” as applicable if the cablecomplies with the Cold Bend Test of Complete Cable described in 7.1(h).j) Optional Wet” or Wet Location” if the cable complies with the Long-Term InsulationResistance Test in Water Described in 7.1(j).k) Optional “Direct Burial” or “Dir Bur” for cables that are not marked “Sunlight Resistant”.SEPTEMBER 4, 2015 UL 1493 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSEPTEMBER 4, 2015UL 149312No Text on This Page
