UL SUBJECT 1263-2001 Outline of Investigation for Irrigation Cables (Issue 5)《灌溉电缆的调查大纲 发布编号 5》.pdf

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1、February 2,2001 1 SUBJECT 1263 OUTLINE OF INVESTIGATION FOR I R R IG AT1 O N CAB LES Issue Number 5 FEBRUARY 2,2001 COPYRIGHT O 1989, 2001 UNDERWRITERS LABORATORIES INC. 2 SUBJECT 1263 FEBRUARY 2,2001 No Text on This Page FEBRUARY 2. 2001 SUBJECT 1263 3 CONTENTS FOREWORD 4 INTRODUCTION 1 Scope . 5 2

2、 Construction 5 2.1 Conductor . 5 2.2 Insulation 5 2.3 Conductor assembly 5 2.4 Inner jacket 6 2.5 Shields 6 2.6 Shield drain wire . 6 2.7 Outer jacket . 7 2.8 Fittings 7 3 Markings . 8 3.1 Cable markings 8 3.2 Tag marking . 8 3.3 Date of manufacture 9 4 Circuit Identification . 9 4.1 Grounded condu

3、ctor 9 4.2 Grounding conductor 10 4.3 Unidentified conductors 10 5 Test Program 10 5.1 Tests 10 4 SUBJECT 1263 FEBRUARY 2,2001 FOREWORD A. This Outline of Investigation contains basic requirements for products covered by Underwriters Laboratories Inc. (UL) under its Follow-Up Service for this catego

4、ry within the limitations given below and in the Scope section of this Outline of Investigation. They are subject to revision as further experience and investigation may show is necessary or desirable. B. The observance of these requirements by a manufacturer is one of the conditions of the continue

5、d coverage of the manufacturers product. C. A product which complies with the text of this Outline of Investigation will not necessarily be judged to comply with the Outline of Investigation if, when examined and tested, it is found to have other features which impair the level of safety contemplate

6、d by these requirements. D. A product employing materials or having forms of construction which conflict with specific requirements of the Outline of Investigation cannot be judged to comply with the Outline of Investigation. A product employing materials or having forms of construction not addresse

7、d by this Outline of Investigation may be examined and tested according to the intent of the requirements and, if found to meet the intent of this Outline of Investigation, may be judged to comply with the Outline of Investigation. E. UL, in performing its functions in accordance with its objectives

8、, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. The opinions and findings of UL represent its professional judgement given with due consideration to the necessary limitations of practical operation and state of the art at the time the Outline of

9、 Investigation is processed. UL shall not be responsible to anyone for the use of or reliance upon this Outline of Investigation by anyone. UL shall not incur any obligation or liability for damages, including consequential damages, arising out of or in connection with the use, interpretation of, or

10、 reliance upon this Outline of Investigation. F. Many tests required by the Outline of Investigations of UL are inherently hazardous and adequate safeguards for personnel and property shall be employed in conducting such tests. FEBRUARY 2,2001 SUBJECT 1263 5 INTRODUCTION 1 Scope 1.1 These cables are

11、 rated 600V, 75C and are for use in wet locations. The insulated-conductor sizes are Nos. 18 - 4/0 AWG stranded copper. The cables are intended to be used in irrigation machines that are electrically driven or electrically controlled in accordance with Article 675 of the National Electrical Code. 2

12、Construction 2.1 Conductor 2.1.1 Annealed stranded copper, bare or coated, in size Nos. 18 - 4/0 AWG. 2.2 Insulation 2.2.1 Listed insulated conductors shall be Types THW-2, THWN-2, XHHW-2, RHW-2, THHW, THW, THWN, RHW, XHHW; or Types TFN, TFFN, RFH-2, or FFH-2 using a wet-locations insulating compoun

13、d rated for at least 75C (167F) (QMlT2 in the case of PVC). 2.2.2 Insulated conductors other than those described in 2.2.1 shall have materials in thicknesses and with temperature ratings appropriate for the specific construction of the irrigation cable in which they are to be used. The materials sh

14、all be evaluated for the requested temperature rating as described in Long-Term Aging, Section 481 of the UL 1581 Reference Standard for Electric Wires, Cables, and Flexible Cords. Investigation of the electrical, mechanical, and physical characteristics of these insulated conductors shall show thes

15、e conductors to be comparable to the conductors described in 2.2.1. The investigation shall include tests such as crushing, impact, abrasion, deformation, heat shock, insulation resistance, and dielectric voltage-withstand. 2.3 Conductor assembly 2.3.1 Conductors of different sizes may be used in th

16、e same cable. The insulated conductors shall be cabled. The length of lay is not specified. The cables shall be provided with fillers where needed to make the finished cable round. 2.3.2 The assembly may be enclosed in a nonmetallic braid, tape, or wrap. 6 SUBJECT 1263 FEBRUARY 2,2001 inches Not ove

17、r 0.700 Over 0.700 but not over 1.500 Over 1.500 but not over 2.500 Over 2.500 2.4 Inner jacket 2.4.1 An inner jacket employing a flame-retardant thermoplastic or thermosetting compound and of a thickness specified in Table 2.1, shall be provided. mm Not over 17.8 Over 17.8 but not over 38.1 Over 38

18、.1 but not over 63.5 Over 63.5 Table 2.1 Minimum thicknesses of inner jacket 36 48 64 Calculated diameter of assembly under inner Minimum average thickness of iacket I iacket 0.91 1.22 1.63 + mils 80 I 2.03 Minimum thickness at any Doint + mils 2.5 Shields 2.5.1 A helically wound or longitudinally a

19、pplied copper or aluminum tape or tapes having a total minimum thickness of 0.008 inch or 0.20 mm and an overlap of not less than 10 percent, or a close-fitting copper or aluminum wire braid shall be applied over the inner jacket. If an aluminum drain wire is used with a shield consisting of a coppe

20、r braid or tape(s), each wire of the copper braid and each copper tape shall have an acceptable continuous coating of tin or another acceptable metal or alloy. 2.6 Shield drain wire 2.6.1 A wire is not required but may be provided as a means of facilitating the termination of the shield. Any drain w

21、ire shall comply with each of the following: a) Shall be applied helically or longitudinally. b) Shall extend throughout the entire length of the cable. c) Shall be of copper or aluminum, with an acceptable continuous coating of tin or another acceptable metal or alloy on a solid copper drain wire (

22、and on each strand of a stranded copper drain wire) that is in contact with a shield consisting of an aluminum braid or tape). d) If of copper, shall not be more than two AWG numbers smaller in size than the smallest circuit conductor in the cable. If of aluminum, shall be at least equal in size to

23、the smallest circuit conductor in the cable. e) Shall be bare (no insulation or other nonmetallic covering) and in intimate contact (good electrical connection) with the shield. FEBRUARY 2,2001 SUBJECT 1263 7 2.6.2 A drain wire smaller than No. 8 AWG may be solid or stranded and, if stranded, may be

24、 in one section or in several sections or individual strands distributed helically or longitudinally around the circumference of the cable. A No. 8 AWG or larger drain wire shall be stranded and in several sections or individual strands distributed helically or longitudinally around the circumferenc

25、e of the cable. No strand of a copper drain wire shall be smaller than 15.2 mils or 0.386 mm in diameter. No strand of an aluminum drain wire shall be smaller than 25.3 mils or 0.643 mm in diameter (No. 22 AWG). 2.7 Outer jacket 2.7.1 An outer jacket employing a thermoplastic or thermosetting compou

26、nd, and of the thicknesses specified in Table 2.2, shall be provided. Table 2.2 Minimum thicknesses of outer jacket Calculated diameter of assembly under outer ai inches Not over 0.750 Over 0.750 but not over 1 .O00 Over 1 .O00 but not over 1.500 Over 1.500 but not over 2.500 Over 2.500 2.8 Fittings

27、 et mm Not over 19.0 Over 19.0 but not over 25.4 Over 25.4 but not over 38.1 Over 38.1 but not over 63.5 Over 63.5 Minimum aven j ac mils 50 60 80 110 140 e thickness of et mm 1.27 1.52 2.03 2.79 3.56 Minimum thick mils 40 48 64 88 112 ss at any point mm 1 .o2 1.21 1.63 2.24 2.84 2.8.1 Fittings shal

28、l be Listed by Underwriters Laboratories Inc. as acceptable for the purpose. The fittings used are to comply with the environmental exposure test requirements described in 5.1.1 (f). 8 SUBJECT 1263 FEBRUARY 2,2001 3 Markings 3.1 Cable markings 3.1.1 The cable shall have the information described bel

29、ow shown on the surface of the outer jacket by means of indelible ink printing or indent or raised printing. The ink printing shall be investigated for durability as specified in Durability of Indelible-Ink Printing, Section 1690 of the Reference Standard for Electrical Wires, Cables, and Flexible C

30、ords, UL 1581. The sequence is not specified. A marker tape is appropriate in addition to the surface printing. Other information, where added, shall not confuse or mislead and shall not conflict with these requirements. See 3.3.1 for date marking. a) Listee and Factory Identification- The name of t

31、he Listee, the Listees trade name for the product, or both, or any other appropriate distinctive marking by means of which the organization responsible for the product is readily identifiable. Where the organization that is responsible for the product is different from the actual manufacturer, both

32、the responsible organization and the actual manufacturer shall be identified by name or by appropriate coding such as by trade name, trademark, the assigned electrical reference number, or the assigned combination of colored marker threads. The meaning of any coded identification shall be made avail

33、able by the organization responsible for the cable. It is appropriate also to identify a private labeler; the means is not specified. b) Number and Size of Conductors - (not required where each conductor is marked). c) ”600 volts” or ”600V. d) The words ”Irrigation Cable” e) “L in a circle or ”(uL)”

34、. f) It is appropriate to include the following: ”NEC Article 675” and/or ”direct burial”. 3.2 Tag marking 3.2.1 A tag on which the following information is indicated plainly (the sequence of the items is not specified) shall be tied to every shipping length of cable. However, where the cable is coi

35、led on a reel or is in a carton, it is appropriate for the tag to be glued, tied, stapled, or otherwise attached to the reel or carton instead of to the cable, or for the tag to be eliminated and the information printed or stenciled directly onto the reel or carton. Other information, where added, s

36、hall not confuse or mislead and shall not conflict with these requirements. See 3.3.1 for date marking. a) The name of the Listee, the Listees trade name for the cable, or both, or any other appropriate distinctive marking by means of which the organization responsible for the cable is readily ident

37、ifiable, and an identification of the factory where the organization responsible for the product makes irrigation cable in more than one factory. Where the organization that is responsible for the product is different from the actual manufacturer, both the responsible organization and the actual man

38、ufacturer shall be identified by name or by appropriate coding such as by trade name, trademark, the assigned electrical reference number, or the assigned combination of colored marker threads. The meaning of any coded identification shall be made available by the organization responsible for the ca

39、ble. It is appropriate also to identify a private labeler; the means is not specified. FEBRUARY 2,2001 SUBJECT 1263 9 b) The quantity and AWG size of conductors. c) “600 volts“ or “600V. d) The statement: “Irrigation cable for installation in accordance with Article 675 of the National Electrical Co

40、de“ with or without the additional statement “for direct burial“. 3.3 Date of manufacture 3.3.1 The date of manufacture by month and year (or in the sequence month, day, and year) shall be included among the tag, reel or carton markings described in 3.2.1, or shall be included among the cable markin

41、gs described in 3.1.1 where legible on the outer surface of the cable. The date shall be shown in plain language, not in code. 4 Circuit Identification 4.1 Grounded conductor 4.1.1 Where only one conductor is intended for use as a grounded circuit conductor, it shall be finished to show the color wh

42、ite or natural grey throughout the entire length and circumference of its outer surface, or shall be identified by three continuous straight or helical, unbroken white stripes on other than green insulation, along its entire length. Straight stripes are to be placed a nominal 120“ apart. Where multi

43、ple grounded circuit conductors are used in a cable, no more than one shall employ white stripes. Additional conductors intended to be grounded circuit conductors shall be finished white or natural grey and shall have any one of the following throughout the length of the wire or cable in a color or

44、combination of colors other than and in contrast with, white, natural grey, or green: (1) An unbroken series of identical numbers or hash marks or other symbols with dimensions as specified for stripes and with regular spacing. (2) Numerals, letters and/or words that comply with this outline, repeat

45、ed at intervals no longer than 3 inches or 76 mm. (3) One or more broken (non-continuous) or unbroken straight or helical stripes. See 4.1.2 for details on stripes. 4.1.1 revised February 2, 2001 4.1.2 Stripes as specified in 4.1.1 and 4.2.3 shall be of even or varying width and shall occupy a total

46、 of 5 - 70 percent of the calculated circumference of the outer surface of the finished insulated conductor in the case of a yellow stripe(s) or a total of 15 - 70 percent of the calculated circumference of the outer surface of the finished insulated conductor in the case of white stripes, with no i

47、ndividual width less than 5 percent of that same circumference. The width shall be measured perpendicular to each stripe. Where broken stripes are appropriate, they shall consist of a series of identical marks and spaces, the length of each mark shall be at least 1/8 inch or 3 mm and the linear spac

48、ing between marks shall not be greater than 3/4 inch or 19 mm. 4.1.2 added February 2, 2001 10 SUBJECT 1263 FEBRUARY 2,2001 4.2 Grounding conductor 4.2.1 A grounding conductor, if provided, shall be equal in size to the largest circuit conductor in the cable, but not smaller than No. 14 AWG copper.

49、4.2.2 A metallic shield or drain wire or sheath or armor does not take the place of a grounding conductor. 4.2.3 The grounding conductor shall be bare or fully insulated. Where insulated, it shall be green for its entire length and circumference with or without one or more straight or helical, broken (non-continuous) or unbroken yellow stripes. See 4.1.2 for details on stripes. The insulating material shall comply with all applicable requirements of a circuit-conductor insulation. 4.2.3 revised February 2, 2001 4.2.4 The grounding conductor may be applied in one or more sections twiste