1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAPRIL 27, 20151UL 1488Outline of Investigation for Seasonal Use Modular TreesIssue Number: 1April 27, 2015Summary of TopicsThis first issue of the Outline of Investigation for Seasonal Use Modula
2、rTrees, UL 1488, covers temporary Indoor Use Seasonal Use Modular trees(“Modular Tree”) and Tree Poles optionally provided with factory-assembled lighting strings or segments (incandescent or LED) and/orother decorative features, with a maximum input voltage rating of 120 V tobe used in accordance w
3、ith the National Electrical Code, ANSI/NFPA 70.Temporary-use is considered to be a period of installation and use notexceeding 90 days.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outl
4、ines 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 ORDISTRIBUTION WITHOUT PERMISSION
5、FROM ULAPRIL 27, 2015UL 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 Connections .78
6、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 912 Wiring Devices .1112.1 Power inlet box or similar construction .1112.2 Tree pole segment connectors .1313 Terminals and Conductive Parts 1
7、314 Overcurrent Protection 1315 Switches .1416 Class 2 Circuits .1417 Mechanical Assembly .1518 Materials 1619 Enclosures .1619.1 General 1619.2 Metallic enclosures .1719.3 Polymeric enclosures .1720 Accessibility of Live Parts 1721 Spacing .1822 Printed Wiring Boards .1823 Enclosure Opening 1924 Bu
8、shing .1925 Strain Relief 20PERFORMANCE26 Leakage Current 2027 Leakage Current Following Humidity Conditioning 2228 Input Test 2329 Temperature Test .2330 Dielectric Voltage-Withstand Test .2631 Strain Relief Test .2632 Abnormal Operation Test 2733 Downward Burning Rate Test 28APRIL 27, 2015 UL 1488
9、 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL34 Conductivity of Decorative Parts Test .2935 Enclosure Mold Stress Relief Test .2936 Impact Test .3037 Resistance to Crushing Test .3338 Adhesive Test 33PRODUCTS EMPLOYING CORD-CONNECTED WIRI
10、NG DEVICES OR POWER INLETS39 General 3440 Strain Relief Test .3441 Reliability of Conductor Connections Test .3442 Security of Blades Test 3543 Security of Input Contacts Test .3544 Security of Insulation Test .3545 Accessibility Test .3646 Fuseholder Temperature Test 3647 Stability Test 38RATINGS48
11、 Details .38MARKING49 General 3850 Cord Tag Markings .3951 Carton/Stuffer Sheet/Product/Cord Tag Markings 4051.1 General .4051.2 Carton markings .41INSTRUCTION MANUAL52 General 41APPENDIX AStandards for ComponentsA1APRIL 27, 2015UL 14884UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
12、 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 features, with a ma
13、ximum 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 that arecove
14、red 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 CIRCUIT A ci
15、rcuit 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 INTERCONNECTING CORD
16、S 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 pre-lit tree
17、that may or may not be provide 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 current path when t
18、hefilament 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 insulator, allo
19、wing 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 allows current t
20、o continue to flowthrough the shunt despite the open filament.APRIL 27, 2015 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 shall comply wit
21、h 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 application of
22、 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 restricted in perform
23、ance 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 in parenthe
24、ses 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 component or another
25、 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.APRIL 27, 2015U
26、L 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 cord cons
27、isting 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 with the Stan
28、dard for Cord Sets and Power-Supply Cords, UL 817. The userinstruction manual shall provide information on the connection and use of the cord set.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
29、 or wire shall be fastened securely and in a workmanlike 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 pro
30、vided that there is nodeformation of the insulation 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
31、 type and overcurrent protection requirement for a modular tree shall be inaccordance with Table 8.1.Table 8.1Wire types, size and overcurrent protection ratingSupply ConnectionbAll other externalwiringaCord Type SPT-2 CXTWWire Size, AWG 14 16 18 20 22 22Max. Current, A 12 10 8 4 2.4c2.4cOvercurrent
32、 Protection, A N/A N/A 8 5 3 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 temperatures on the insulation shall not exceed 90C (194F).The wire is require
33、d to meet the requirements described in the Standard for Appliance Wiring Material, UL 758.bCXTW is only permitted as a supply connection when the product only employs lighting strings and where the first lightingstring is used for connection to the wall receptacle.cWhen a load fitting is provided,
34、the maximum current is limited to 1.8 amps.APRIL 27, 2015 UL 1488 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9 Internal Wiring9.1 All internal wiring shall comply with the Standard for Flexible Cords and Cables, UL 62, or theStandard for
35、 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 General10.1.1 The Lighting string segment shall comply with the applicable requirements described in theStandard for S
36、easonal and Holiday Decorative Products, UL 588, unless otherwise referenced within thisdocument. In addition, the segments are permitted to be terminated in non-standard connectors.10.1.2 Single conductor CXTW, CXTW-X, LXT or LXT-X wire is permitted provided it is secured to andsupported by the bra
37、nch of the tree and space between the suspended wire and the branch shall notexceed 1/2 in (12.7 mm).Exception: 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 th
38、at thereis no pinching, cutting or abrasion of the wire or stress on the internal conductors.10.1.3 A non-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
39、 with the Strain Relief requirements in 79.1 and 79.2 of the Standard for Seasonal and HolidayDecorative Products, UL 588.10.1.4 Lighting segments are permitted to employ wire types shown in Table 10.1.Table 10.1Lighting Segment Wire TypesLamp TypeWire in the Lighting SegmentaWire Between Series-con
40、nectedLampholdersbWire SizeAWG Wire TypeTemperatureC (F)Wire SizeAWG Wire TypeTemperatureC (F)LED 22 LXT 60 (140) 25 LXT-X 60 (140)Incandescent 22 CXTW 105 (221) 25 CXTW-X 105 (221)aIs also permitted to be employed between series-connected lampholders.bThe maximum length shall not exceed 20 in (508
41、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.APRIL 27, 2015UL 14888UL COPYRIGHTED MATERIAL NOT AUTHORIZED FO
42、R FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10.2 Lamps10.2.1 Lamps shall comply 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 t
43、he number oflampholders in the segment.10.3.2 Each product employing push-in with user-replaceable 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
44、 a product shall be polarized.11 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 th
45、e Standard for Cord Sets 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 th
46、e fuse(s). In addition, 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
47、 11.1.Exception: If the 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.APRIL 27, 2015 UL 1488 9UL COPYRIGHTED
48、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 11.1Accessibility probeAPRIL 27, 2015UL 148810UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12 Wiring Devices12.1 Power inlet box or similar co
49、nstruction12.1.1 If the product employs a power inlet intended for use with a cord set or detachable power-supplycord, the connecting means to the power supply of the product shall be constructed such that, when thecord connector of a cord set or detachable power-supply cord is inserted, the blades will not be energizeduntil they are inaccessible to contact by persons. Compliance shall be determined by the AccessibilityTest, Section 45.12.1.2 The face of a cord connector, current tap, or dedicated receptacle employed in a product shall be:a) Circular with
