1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared by UL LLC. It is normative for the applicable ULProduct Certification Program(
2、s); however, it is currently not part of the UL Standard(s) referencedbelow.Product Category (CCN): DGZWStandard Number: UL 588Standard Title: Standard for Seasonal and Holiday Decorative ProductsEdition Date: October 26, 2015Edition Number: 19Section / Paragraph Reference: Supplement SD (new)Subjec
3、t: Addition of String Lights for All-Year UseDECISION:SUPPLEMENT SD - String Lights for All-Year UseINTRODUCTIONSD1 ScopeSD1.1 This supplement covers factory-assembled string lights intended for year round use with amaximum input voltage rating of 120 V. This includes string lights with candelabra-,
4、 intermediate-, ormedium screw lampholders or nonreplaceable lamps connected in parallel for direct-connection use. Thelamps are permitted to be provided with covers or reflectors. These requirements cover products that areportable and not permanently connected to a power source.SD1.2 These requirem
5、ents do not cover lighting strings intended to provide temporary illumination duringthe period of construction, remodeling, maintenance, repair, or demolition of buildings or structures, orsimilar activities, in accordance with the U.S. National Electrical Code (NEC), ANSI/NFPA 70, Article 590,which
6、 are covered under UL 1088, the Standard for Temporary Lighting Strings.SD1.3 These requirements do not cover under-cabinet lighting strings, which are covered under theStandard for Portable Electric Luminaires, UL 153.SD2 DefinitionsSD2.1 String Lights Parallel-connected string of discrete lamps in
7、terconnected through lengths of cord,and terminating in an attachment plug. The string lights optionally may be provided with a load fitting (cordconnector), a controller, or other features as described in the Standard.CONSTRUCTIONSD3 GeneralSD3.1 The string lights shall comply with the applicable r
8、equirements described elsewhere in thisStandard except as otherwise specified in this Supplement.SD3.2 Parallel-connected lighting strings are permitted to employ non-replaceable lamps with integrallampholders, or replaceable lamps with candelabra-screw (E12), intermediate-screw (E17), ormedium-scre
9、w (E26) lampholders.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSD4 Overcurrent ProtectionSD4.1 The overcurrent protection shall be as described in the Standard except for the references to wiretypes and sizes as described in Supply Connec
10、tions, Section SD5. For string lights employing minimum16 AWG cord, or string lights employing 18 AWG with no load fitting, overcurrent protection is notrequired.SD5 Parallel-connected Supply ConnectionsSD5.1 The wire types and sizes shall comply with Supply Connections, Section 13, and Table 6.2, e
11、xceptthe conductor size shall be minimum 18 AWG. The cord type shall be minimum SPT-2W.SD5.2 For string lights employing medium screw lampholders, the cord that connects separatelampholders shall be a hard usage type (SJW or equivalent) and any cords for individual lampholders shallbe permitted to b
12、e in accordance with SD5.1.SD6 General RequirementsSD6.1 Each lampholder of a light set employing medium-screw lampholders shall be provided with a hookor similar means for hanging.SD6.2 Lights sets employing medium-screw incandescent lamps are permitted for outdoor use only.Lights sets employing me
13、dium-screw LED or Compact Fluorescent (CFL) lamps are permitted forindoor/outdoor use. When replaceable, LED and CFL lamps shall meet the requirements described in theStandard for Self-Ballasted Lamps and Lamp Adapters, UL 1993.SD6.3 The lamp envelope temperature requirements described in Temperatur
14、e Test, Section 43, are notapplicable for the medium screw lamps.SD6.4 Lampholders employing insulation piercing terminals shall additionally comply with the strainrelief/terminal temperature test described in SB18.4.SD6.5Medium screw lampholders shall comply with Supplement SB or shall be a weather
15、proof or wetlocation type lampholder complying with the performance requirements described in the Standard forLampholders, UL 496.SD6.6 To provide a seal against water, a medium screw lampholder shall be permitted to utilize a designin which the lampholder cavity has a depth greater than the maximum
16、 depth requirement specified in theStandard for Lampholders, UL 496, if the lampholder accommodates lamps of the intended type.SD6.7 Uninsulated live parts of a screw shell shall not be exposed above the rim of the lampholder cavityexcept during lamp replacement.SD6.8 A load fitting on a string ligh
17、t shall be provided with a closure or cover that is attached to the cordof the string light in proximity to the load fitting that renders all uninsulated live parts inaccessible. Thecover or closure shall be permanently marked “Insert in cord connector when not in use”, or equivalent.SD6.9 A product
18、 employing medium screw lamps shall employ lamps rated a maximum of 40 W.PERFORMANCESD7.1 The string lights shall comply with the applicable requirements described in this Standard exceptas otherwise specified below.STANDARD NUMBER: UL 588 -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPROD
19、UCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSD8 Strain Relief TestSD8.1 An attachment plug, cord connector, parallel connected lampholder, splice or tap shall withstand apull of 30 lbf (133 N) for 18 AWG or larger cords and 20 lbf (89N) for cords 20 AWG and smaller. Theforce shall be applied for
20、 1 min to the cord or cable in a direction that is perpendicular to the plane of entryto the device. The device body shall not separate or break and internal parts shall not be adverselyaffected so as to result in a possible fire or electric-shock condition. The conductors shall not break andthe ins
21、ulation shall not be damaged (exhibit cuts, rips, or tears). Stress shall not be transmitted, by thepull, to wiring connections unless a factory connection is made by welding, riveting, crimping, or theequivalent. Soldering is considered equivalent if an offset or one or more right angle bends in th
22、econductor prevents a pull on the conductor from being transmitted directly to the connection. An unbrokenthrough conductor is also considered equivalent.SD8.2 If connections are not made by welding, riveting or the equivalent, special representative devicesare to be employed in which the internal c
23、onnections have been severed. Displacement of the conductors,conductor insulation, or outer jacket of a cord by 0.8 mm (0.031 in) or more is unacceptable unless thedisplacement would not have stressed the connections.SD8.3 Six representative devices are to be tested. The device is to be securely sup
24、ported by a rigid flatplate mounted horizontally. The plate is to have a hole just large enough for the conductors to passthrough. A pull is to be applied by means of a weight to the cord or cable in a direction perpendicular tothe plane of conductor entry. The force is to be applied gradually.SD9 F
25、lexing TestSD9.1 The test shall be conducted as described in the Standard except 1500 cycles shall be conducted.This test is not required on string lights employing jacketed flexible cords or on parallel cord for individuallampholders where the exposed cord length is 4 in. (10.16 cm) or less.SD10 Co
26、nditioning Test Prior to Rain TestSD10.1 Prior to the Rain Test, the cord of a string light employing medium screw lampholders shall bemade to rotate ten times to an angle of 90 degrees to each side of the center position, in a planeperpendicular to the direction at which it enters the lampholder. E
27、ach flexing cycle shall take place overapproximately 2 seconds, applying the minimum necessary pulling stress to the cord by gripping it 1 foot(30.5 cm) from the point where it enters the lampholder. Flexing shall occur to both the main supply cord(between lampholders) and for an individual lamphold
28、er supply cord.SD11 Abnormal Operation TestSD11.1 A string light shall not produce a fire or electric shock when operated continuously as describedin SD11.2.SD11.2 With the maximum rated wattage lamps in place, the light set shall be operated continuously atthe total rated wattage of the string. Eac
29、h lampholder is to be resting on a white tissue paper coveredsoftwood surface. A 3 A non-time-delay plug fuse is to be connected between earth ground and thegrounded conductor. The string is to be operated continuously until ultimate results have been observed.In most cases, continuous operation for
30、 7 hours will be necessary to determine that the ultimate resultshave been observed. The results are considered to be acceptable if the tissue paper is not ignited and ifthe 3 A grounding fuse does not open.MARKINGSSTANDARD NUMBER: UL 588 -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
31、CTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSD12 GeneralSD12.1 The marking requirements shall be as described in Sections 122 127 for decorative lightingstrings unless superseded by the requirements specified in this supplement. In addition:a) The term “string light” shall replace the term “light
32、ing string” where referenced in thesesections,b) The terms Prime seasonalPrime or Prime holidayPrime are not required,c) The statements following the term “CAUTION” shall not reference products other than stringlights,d) For string lights employing medium screw lamps, the current rating is not requi
33、red,e) The load fitting marking shall be as described in SD12.5.f) The string lights are permitted to be marked “This product is intended for all-year use”.SD12.2 The letters on the cord tag shall be black on a yellow background.SD12.3 The markings described in 125.1.2, 125.1.5, 125.5.1, 125.5.2, 12
34、5.6 and 126.4.1 (a) are notrequired.SD12.4 A string light employing medium screw lamps shall be marked “For Outdoor Use” or equivalent.SD12.5 A string light employing a load fitting shall be marked: CAUTION: This string light is rated_Watts, do not overload. Connect other string lights end-to-end up
35、 to a maximum of _ Watts total.SD12.6 If investigated for the maximum current for the conductor size employed in a string light employingmedium base lamps in accordance with Table 13.1, a string light employing medium base lamps markedin accordance with 125.3.3 is permitted to be provided with lamp
36、replacement markings indicating amaximum 40 W lamp.SD12.7 A string light employing medium screw base lamps is permitted to include one or more of the lamptypes indicated in Figure 125.1 or one of the following medium base lamp types: CFL, LED or CCL.SD13 GeneralSD13.1 The instruction manual requirem
37、ents shall be as described in Sections 128 - 131 unlesssuperseded by the requirements specified in this supplement.SD13.2 The Use and Care instructions described in Section 130 shall not be provided.SD13.3 Important Safety Instructions shall be as follows:IMPORTANT SAFETY INSTRUCTIONSWhen using elec
38、trical products, basic precautions should always be followed including the following:a) READ AND FOLLOW ALL SAFETY INSTRUCTIONS.STANDARD NUMBER: UL 588 -4-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULb) Do not use these products outdoors un
39、less marked suitable for indoor and outdoor use.When products are used in outdoor applications, connect the product to a Ground Fault CircuitInterrupting (GFCI) outlet. If one is not provided, contact a qualified electrician for properinstallation.c) Do not mount or place near gas or electric heater
40、s, fireplaces, barbeque grills, candles orother similar sources of heat.d) Do not secure the wiring of the product with staples or nails, or place on sharp hooks ornails. For light sets employing medium screw lamps, this statement shall include: “Install onlyusing the mounting means provided”.e) Do
41、not let lamps rest on the supply cord or on any wire.f) Do not use this product for other than its intended use.g) Do not hang objects from cord, wire, or light string.h) Do not close doors or windows on the product or extension cords as this may damage thewire insulation.i) Do not cover the product
42、 with cloth, paper or any material not part of the product when inuse.j) This product has a polarized plug (one blade is wider than the other) as a feature to reducethe risk of electric shock. This plug will fit in a polarized outlet only one way. If the plug doesnot fit fully in the outlet, reverse
43、 the plug. If it still does not fit, contact a qualified electrician. Donot use with an extension cord unless plug can be fully inserted. Do not alter or replace theplug. It is acceptable to omit this item if the product does not employ a polarized plug.k) This product is equipped with push-in type
44、lamps. Do not twist lamps. It is acceptable toomit this item if the product does not contain push-in type lamps.l) This product employs overload protection (fuse). A blown fuse indicates an overload or short-circuit situation. If the fuse blows, unplug the product from the outlet. Also unplug any ad
45、ditionalstrings or products that may be attached to the product. Replace the fuse as per the userservicing instructions (follow product marking for proper fuse rating) and check the product. Ifthe replacement fuse blows, a short-circuit may be present and the product should bediscarded. It is accept
46、able to omit this item if the fuse is not replaceable or where overloadprotection is not required.m) Read and follow all instructions that are on the product or provided with the product.n) SAVE THESE INSTRUCTIONSSD13.4 For a string light employing medium screw lampholders, the installation instruct
47、ions shall describethe proper use of a guide wire if provided.SD13.5 For a string light employing medium screw lampholders and incandescent lamps, the followinginstruction shall be provided: CAUTION: Risk of Fire. Keep lamps away from any combustible surface.CARTON MARKINGSSTANDARD NUMBER: UL 588 -5
48、-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSD14 GeneralSD14.1 The carton markings shall be as specified in Section 127 except for the carton used for stringlights employing medium screw lamps shall only be marked with the statement “Outd
49、oor Use Only”.RATIONALE FOR DECISION:There has been interest from Industry to extend the use of lighting strings to year round use. To date,lighting strings could be covered under the scope of multiple product standards such as the Standard forSeasonal and Holiday Decorative Products, UL 588, for seasonal and holiday lighting; the Standard forPortable Electric Luminaires, UL 153, for general illumination; or the Standard for Temporary LightingStrings, UL 1088, for temporary lighting strings which are typically installed in construction enviro
