1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMAY 24, 20161UL 1488Outline of Investigation for Seasonal Use Modular TreesIssue Number: 3May 24, 2016Summary of TopicsThis third issue of the Outline of Investigation for Seasonal Use ModularTre
2、es, UL 1488, contains revisions to requirements for supplyconnections, cords, lighting string segment, leakage current andcarton/stuffer sheet/product/cord tag markings.ULs Outlines of Investigation are copyrighted by UL LLC. Neither a printed norelectronic copy of an Outline of Investigation should
3、 be altered in 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 ULLLC.COPYRIGHT 2016 UL LLCUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WI
4、THOUT PERMISSION FROM ULMAY 24, 2016UL 14882No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 Glossary .53 Components 64 Units of Measurement .65 References .6CONSTRUCTION6 General .67 Supply C
5、onnections .78 Cords 79 Internal Wiring 810 Lighting String Segment 810.1 General .810.2 Lamps .910.3 Lamping 910.4 Polarization .911 Fuseholders and Fused Attachment Plugs .1012 Wiring Devices .1212.1 Power inlet box or similar construction .1212.2 Tree pole segment connectors .1413 Terminals and C
6、onductive Parts 1414 Overcurrent Protection 1415 Switches .1516 Class 2 Circuits .1517 Mechanical Assembly .1618 Materials 1719 Enclosures .1719.1 General 1719.2 Metallic enclosures .1819.3 Polymeric enclosures .1820 Accessibility of Live Parts 1821 Spacing .1922 Printed Wiring Boards .1923 Enclosur
7、e Opening 2024 Bushing .2025 Strain Relief 21PERFORMANCE26 Leakage Current 2127 Leakage Current Following Humidity Conditioning 2328 Input Test 2429 Temperature Test .2430 Dielectric Voltage-Withstand Test .2731 Strain Relief Test .2732 Abnormal Operation Test 2833 Downward Burning Rate Test 29MAY 2
8、4, 2016 UL 1488 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL34 Conductivity of Decorative Parts Test .3035 Enclosure Mold Stress Relief Test .3036 Impact Test .3137 Resistance to Crushing Test .3438 Adhesive Test 34PRODUCTS EMPLOYING CORD
9、-CONNECTED WIRING DEVICES OR POWER INLETS39 General 3540 Strain Relief Test .3541 Reliability of Conductor Connections Test .3542 Security of Blades Test 3643 Security of Input Contacts Test .3644 Security of Insulation Test .3645 Accessibility Test .3746 Fuseholder Temperature Test 3747 Stability T
10、est 39RATINGS48 Details .39MARKING49 General 3950 Cord Tag Markings .4051 Carton/Stuffer Sheet/Product/Cord Tag Markings 4251.1 General .4251.2 Carton markings .42INSTRUCTION MANUAL52 General 42APPENDIX AStandards for ComponentsA1MAY 24, 2016UL 14884UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
11、 REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This outline covers temporary Indoor Use Seasonal Use Modular trees (“Modular Tree”) and TreePoles optionally provided with factory-assembled lighting strings or segments (incandescent or LED)and/or other decorative featur
12、es, with a maximum input voltage rating of 120 V to be used in accordancewith the National Electrical Code, ANSI/NFPA 70. Temporary-use is considered to be a period ofinstallation and use not exceeding 90 days.1.2 These requirements do not cover decorative lighting strings or other seasonal products
13、 that arecovered under the Standard for Seasonal and Holiday Decorative Products, UL 588.1.3 The complete modular tree shall additionally comply with the Outline of Investigation for Fire Tests ofPre-Lit Artificial Seasonal Use Trees and Other Seasonal Decorative Items, UL 2358.2 Glossary2.1 CLASS 2
14、 CIRCUIT A circuit powered from the output of a Class 2 transformer or a Class 2 powerunit. Refer to Section 16 for detailed information.2.2 CONNECTORS, TREE POLE SEGMENT Connecting couplers installed within tree pole providingelectrical and physical connection between tree pole segments.2.3 INTERCO
15、NNECTING CORDS Length of cord with a minimum of one nonstandard fitting intendedfor connecting multiple modules.2.4 LIGHTING STRING SEGMENT Lighting strings that are provided with nonstandard fittings orintended for direct wiring to a tree pole or modular tree.2.5 MODULAR TREE A complete artificial
16、pre-lit tree that may or may not be provided with modules.2.6 MODULES Units or sections that can be added or removed. Examples include flasher controllers,music boxes and the like, and means for connection to source of supply.2.7 SHUNT, LAMP A device used in series-connected lamps to provide a curre
17、nt path when thefilament of a lamp opens so that the remaining lamps in the series-connected string or decorative outfitremain illuminated. A shunt typically consists of several turns of aluminum wire wound around the pair offilament support posts. The aluminum oxide coating on the wire acts as an i
18、nsulator, allowing current tonormally flow through the filament. When the filament of the lamp opens, a high voltage (approximately120 V) is present across the support posts causing the oxide coating of the shunt to break down. Theshunt then becomes electrically connected to the support posts and al
19、lows current to continue to flowthrough the shunt despite the open filament.MAY 24, 2016 UL 1488 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 Components3.1 Except as indicated in 3.2, a component of a product covered by this outline shal
20、l comply with therequirements for that component. See Appendix A for a list of standards covering components generallyused in the products covered by this outline.3.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not required in the ap
21、plication of the component in theproduct covered by this outline, orb) Is superseded by a requirement in this outline.3.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.3.4 Specific components are incomplete in construction features or restricte
22、d in performance capabilities.Such components are intended for use only under limited conditions, such as certain temperatures notexceeding specified limits, and shall be used only under those specific conditions.4 Units of Measurement4.1 Values stated without parentheses are the requirement. Values
23、 in parentheses are explanatory orapproximate information.5 References5.1 Any undated reference to a code or standard appearing in the requirements of this outline shall beinterpreted as referring to the latest edition of that code or standard.CONSTRUCTION6 General6.1 If a product employs a componen
24、t or another product as part of its construction, each part of theproduct shall comply with its applicable construction requirements. For example, if a modular tree employsa lighting string and controller, then construction requirements for a lighting string and controller shall allbe applicable.MAY
25、 24, 2016UL 14886UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7 Supply Connections7.1 A product shall be provided with a means for connection to the supply circuit. This means shall consistof one of the following:a) An integral power-supply
26、 cord consisting of a length of flexible cord and a NEMA 1-15polarized attachment plug or current tap.b) A power inlet intended for use with a cord set or detachable power-supply cord with a NEMA1-15 polarized plug if the manufacturer provides a detachable cord set with the product whichcomplies wit
27、h the Standard for Cord Sets and Power-Supply Cords, UL 817. The userinstruction manual shall provide information on the connection and use of the cord set.c) A supply cord employing 22 AWG CXTW is permitted to be used if it is used within therating and all of the fittings are non-polarized when pro
28、vided with female end connector oroptionally polarized when a female end connector is not provided.7.2 The length of a detachable power supply cord provided with a modular tree shall be suitable for theapplication.7.3 The conductors of the flexible cord or wire shall be fastened securely and in a wo
29、rkmanlike mannerto the terminals of an attachment plug, current tap, load fitting or connectors as determined by theReliability of Conductor Connections Test, Section 41.7.4 Wire positioning devices are permitted to be used on tree poles or branches provided that there is nodeformation of the insula
30、tion of the flexible cord, wires, or other conductors.8 Cords8.1 Cords employed shall comply with the Standard for Flexible Cords and Cables, UL 62, or theStandard for Appliance Wiring Material, UL 758. All wire shall be rated VW-1.8.2 The wire size and type and overcurrent protection requirement fo
31、r a modular tree shall be inaccordance with Table 8.1.MAY 24, 2016 UL 1488 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 8.1Wire types, size and overcurrent protection ratingSupply ConnectiondAll other externalwiringaCord Type SPT-2 C
32、XTWWire Size, AWG 14 16 18 20 22 22Max. Current, A 12 10 8c4 2.4b2.4bOvercurrent Protection, A N/A N/A 8c53 3aWhen the wiring is in the secondary of a Class 2 power supply, the wire shall be suitable for the current and rated VW-1. Theinsulation shall be suitable for the voltage and temperature, and
33、 temperatures on the insulation shall not exceed 90C (194F).The wire is required to meet the requirements described in the Standard for Appliance Wiring Material, UL 758.bWhen a load fitting is provided, the maximum current is limited to 1.8 amps.cWhen an 8 A fuse is employed, the maximum current sh
34、all not exceed 8 A. Whena5Afuse is employed, the maximumcurrent shall not exceed 4 A.dWhen more than one connection to the source of supply is provided, the maximum current rating specified above shall applyto each circuit. The total current rating of the product shall be on the cord tag.9 Internal
35、Wiring9.1 All internal wiring shall comply with the Standard for Flexible Cords and Cables, UL 62, or theStandard for Appliance Wiring Material, UL 758, with a minimum 30 mil (0.76 mm) insulation thicknessand shall be suitable for the voltage, temperature and current.10 Lighting String Segment10.1 G
36、eneral10.1.1 The Lighting string segment shall comply with the applicable requirements described in theStandard for Seasonal and Holiday Decorative Products, UL 588, unless otherwise referenced within thisdocument. In addition, the segments are permitted to be terminated in non-standard connectors.1
37、0.1.2 Single conductor CXTW, CXTW-X, LXT or LXT-X wire is permitted provided it is secured to andsupported by the branch of the tree and space between the suspended wire and the branch shall notexceed 1/2 in (12.7 mm). Single conductor CXTW-S is permitted and is not required to be further secured.Ex
38、ception: In areas where the branches need to fold such as for storage, the space between the branchand the wire is permitted to exceed in (12.7 mm). The length of the wire shall be sufficient so that thereis no pinching, cutting or abrasion of the wire or stress on the internal conductors.10.1.3 A n
39、on-standard connector used to terminate the lighting string segment shall be capable ofpreventing a pull exerted on the leads to be transmitted to the connector contacts. This connector shallcomply with the Strain Relief requirements in 79.1 and 79.2 of the Standard for Seasonal and HolidayDecorativ
40、e Products, UL 588.10.1.4 Lighting segments are permitted to employ wire types shown in Table 10.1.MAY 24, 2016UL 14888UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 10.1Lighting Segment Wire TypesLamp TypeWire in the Lighting SegmentaW
41、ire Between Series-connectedLampholdersbWire SizeAWG Wire TypeTemperatureC (F)Wire SizeAWG Wire TypeTemperatureC (F)LED 22 LXT 60 (140) 25 LXT-X 60 (140)Incandescent 22 CXTW,CXTW-S105 (221) 25 CXTW-X 105 (221)aIs also permitted to be employed between series-connected lampholders.bThe maximum length
42、shall not exceed 20 in (508 mm) and shall be used in a circuit where the maximum current does notexceed 300 mA. In cases where the lampholders are in different branches, the length of wire shall be sufficient so that there isno stress on the electrical connections.10.2 Lamps10.2.1 Lamps shall comply
43、 with the applicable requirements in the Standard for Seasonal and HolidayDecorative Products, UL 588.10.3 Lamping10.3.1 Each segment shall be provided with a number of lamps equal to or greater than the number oflampholders in the segment.10.3.2 Each product employing push-in with user-replaceable
44、lamps in accordance with 10.3.1 shall beprovided with at least two spare lamps for each type of lamp installed in the product.10.4 Polarization10.4.1 The attachment plug, current tap, or power inlet of a product shall be polarized.Exception: When a CXTW cord is used as a supply connection as describ
45、ed in Section 8, Cords, thefittings shall be non-polarized when products employed with a female end connector; and, optionallypolarized when a female end connector is not provided.MAY 24, 2016 UL 1488 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION
46、FROM UL11 Fuseholders and Fused Attachment Plugs11.1 A fuseholder shall comply with the Standard for Fuseholders Part 1: General Requirements, UL4248-1.11.2 A fused attachment plug or current tap shall comply with the Standard for Attachment Plugs andReceptacles, UL 498, or the Standard for Cord Set
47、s and Power-Supply Cords, UL 817.11.3 Insulation piercing terminals shall not be permitted.11.4 The fused attachment plug, current tap, fuseholder, or in-line fuseholder shall be constructed suchthat there shall not be exposure of live parts during removal or replacement of the fuse(s). In addition,
48、 fora fused attachment plug or current tap, there shall not be exposure of live parts with the fuse coverpartially open during 0.08 in (2.03 mm) insertion into a receptacle. Exposure of live parts shall bedetermined by contact with the accessibility probe illustrated in Figure 11.1.Exception: If the
49、 design of the fused attachment plug, current tap, fuseholder, or in-line fuseholderprevents the parts from being energized during the removal or replacement of fuse(s), exposure of liveparts is permitted.This is generated text for figtxt.MAY 24, 2016UL 148810UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 11.1Accessibility probeMAY 24, 2016 UL 1488 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12 Wiring Devices12.1 Power inlet box
