《UL-1573-BULLETINS-2005.pdf》由会员分享，可在线阅读，更多相关《UL-1573-BULLETINS-2005.pdf（86页珍藏版）》请在三一文库上搜索。
1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 1573 September 9, 2005 SUMMARY OF TOPICS This document is for preliminary review and discussion only. The following items are for discussion: 1. Preliminary review of the current Fourth Edition of UL 1573 including a) Removal of t
2、he TermPigtailfrom the standard; and b) Changes to Lamp Containment Barrier and UV Radiation Filter Requirements for Metal Halide Lamps COMMENTS DUE: NOVEMBER 7, 2005 For your convenience in review, proposed additions to existing requirements are shown underlined and proposed deletions are shown lin
3、ed-out. 1. Preliminary review of the current Fourth Edition of UL 1573 including a) Removal of the Term Pigtail from the standard; and b) Changes to Lamp Containment Barrier and UV Radiation Filter Requirements for Metal Halide Lamps BACKGROUND Based on requests from the Standards Technical Panel, U
4、L has decided to pursue ANSI approval of the Fourth Edition of UL 1573, the Standard for Stage and Studio Luminaires and Connector Strips. In order to facilitate future ANSI approval, UL is providing the complete 4th edition, along with proposed changes, for preliminary review and comment only. UL p
5、lans to submit the standard for ballot and comment in the future. RATIONALES FOR PROPOSED CHANGES a) Removal of the Term Pigtail from the Standard This item has been proposed by Steven Holmes of Underwriters Laboratories. Where unnecessary for effective reader understanding, UL recommends terms that
6、 are generally considered slang not be used in standards. UL proposes the term pigtail, as often used in the phrase pigtail leads, be removed from UL 1573. This is consistent with activities at removing it from the US National Electrical Code, NFPA 70. Paragraphs affected are 24.2, 25.1, 25.6, and 3
7、0.1.9. The changes are refl ected in the document for review. b) Changes to Lamp Containment Barrier and UV Radiation Filter Requirements for Metal Halide Lamps This item has been proposed by Steven Holmes of Underwriters Laboratories. Copyright Underwriters Laboratories Inc. Provided by IHS under l
8、icense with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/18/2006 02:56:39 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION The lamp containment barrier requirements in UL 1573 address t
9、he risk of arc tube fragments falling out of the luminaire should the arc tube rupture. Presently, the standard does not require a lamp containment barrier on a metal halide lamp provided with an integral glass outer envelope. However, there are metal halide lamps provided with an integral glass out
10、er envelope which the lamp manufacturer also requires be used in a luminaire that has a lamp containment barrier. A metal halide lamp that the lamp manufacturer identifi es as suitable for use in a luminaire not provided with a lamp containment barrier or UV attenuation barrier, is assigned the O co
11、de letter designation in the luminaire portion of the lamp code designation. The manufacturer of a Type O metal halide lamp has confi rmed the lamp complies with the ruptured arc tube fragment containment test procedure in ANSI C78.389-2004, American Nationale Standard for Electric Lamps - High inte
12、nsity Discharge - Methods of Measuring Characteristics. In addition to Type O lamps, thick-glass parabolic refl ector (PAR) lamps also provide containment for arc tube particles. It is therefore not necessary to use thick-glass refl ector (PAR) lamps only in a luminaire provided with a lamp containm
13、ent barrier. UL proposes to revise UL 1573 to require the lamp containment barrier for luminaires intended for use with a metal halide lamp. UL also proposes that the lamp containment barrier not be required for luminaires intended for use with only a Type O lamp or a thick-glass PAR type lamp. Thes
14、e revisions are consistent with new Section 410.73(F)(5) in the 2005 NEC. UL 1573 also requires luminaires that use a metal halide lamp not provided with an integral outer glass envelope be provided with a fi lter for UV radiation emitted by the lamp. However, there are also metal halide lamps provi
15、ded with an integral outer glass envelope which the lamp manufacturer also requires be used in a luminaire that has a UV attenuation barrier. The manufacturer of a Type O High-Intesity Discharge (HID) lamp has also confi rmed the effective actinic UV radiation output of the lamp does not exceed 2 mW
16、/klm for a non-refl ector lamp or 2 mW/(m2-klx) for a refl ector lamp when evaluated as specifi ed in ANSI/IESNA RP-27.1-96, Recommended Practice for Photobiological Safety for Lamps b) 0.74 mm (0.029 inch) when of zinc-coated steel; or c) 0.81 mm (0.032 inch) when of copper, brass, or aluminum. b I
17、n this table, component refers to an electrical device, such as a lampholder or switch. c Minimum required thickness for forms of construction that have been determined to provide the physical strength and protection in accordance with 7.1. 7.1.2 A metal striplight or connector-strip trough or wirew
18、ay containing circuit conductors shall be made of sheet metal not less than 0.79 mm (0.031 inch) thick. 7.2 Cast metal 7.2.1 Cast metal thickness shall comply with the requirements in Table 7.2. SEPTEMBER 9, 2005SUBJECT 1573-10- Copyright Underwriters Laboratories Inc. Provided by IHS under license
19、with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/18/2006 02:56:39 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Table 7.2 Cast metal thickness MetalAt unreinforced areas exceeding 3
20、5 square inches (226 cm2), At all other areas, mm(inch)mm(inch) Die-cast metal2.05/641.23/64 Cast malleable iron or permanent mold cast aluminum2.43/321.61/16 Other cast metal3.21/82.43/32 8 Openings 8.1 The requirements in this section apply to permissible openings in the enclosure as described in
21、6.1. 8.2 An open hole in the enclosure as specifi ed in 6.1 shall not exceed the dimensions specifi ed in Table 8.1. Table 8.1 Maximum size of miscellaneous open holes Shape of openingDimension,Maximum area, mm(inch)cm2(inch2) Slot9.53/89.681-1/2 (width) Square12.71/2 (side) Round12.71/2 (diameter)
22、Irregular9.681-1/2 8.3 The total area of one or more open holes shall not be more than 15 percent of the area of the surface in which it is located. This includes the wiring compartment or integral outlet box compartment. 8.4 The enclosure shall be constructed so that molten metal, burning insulatio
23、n, fl aming particles, or the like do not fall on the surface below. 8.5 The requirement in 8.4 specifi es that an opening in an enclosure bottom be provided with a dripping material barrier above or below the opening when the opening is: a) Under a motor, unless: 1) The structural parts of the moto
24、r or of the appliance provide the equivalent of such a barrier; 2) The protection provided with the motor is such that no burning insulation or molten material falls to the surface below the appliance when the motor is energized under each of the following fault conditions: i) Open main winding, SEP
25、TEMBER 9, 2005SUBJECT 1573-11- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/18/2006 02:56:39 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE O
26、NLY NOT FOR OUTSIDE DISTRIBUTION ii) Open starting winding, iii) Starting switch short-circuited, and iv) For a permanent-split-capacitor motor, the capacitor is short-circuited. The short circuit is to be applied before the motor is energized and the rotor is to be blocked. 3) The motor is provided
27、 with a thermal motor protector (a protective device that is sensitive to both temperature and current) that prevents the temperature of the motor windings from becoming more than 125C (257F) under the maximum load under which the motor runs without causing the protector to cycle, and from becoming
28、more than 150C (302F) with the rotor of the motor locked; or 4) The motor complies with the requirements for impedance-protected motors; b) Under wiring, unless the wiring complies with the VW-1 (Vertical-Specimen) Flame Test in the Reference Standard for Electrical Wires, Cables, and Flexible Cords
29、, UL 1581; c) Under an unenclosed switch, transformer, relay, solenoid, and the like, unless it can be shown that malfunction of the component does not result in a fi re; or d) Under fi eld- and factory-made splices and overload and overcurrent protection devices. Exception:A dripping material barri
30、er is not required to be provided when the opening is not within the area under the component requiring a barrier as illustrated by Line D in Figure 8.1. This is generated text for fi gtxt. SEPTEMBER 9, 2005SUBJECT 1573-12- Copyright Underwriters Laboratories Inc. Provided by IHS under license with
31、ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/18/2006 02:56:39 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 8.6 The dripping material barrier specifi ed in 8.5 shall be: a) Horizonta
32、l; b) Of metal, ceramic, or a material that can be used as an enclosure material in accordance with 6.2; c) Located as indicated in Figure 8.1; and d) Shall have an area not less than that described in Figure 8.1. 8.7 The mounting surface of the luminaire enclosure shall have no unused openings. 9 R
33、estraint of Overhead Objects 9.1 The structure and all joints of an overhead product and its accessories shall be capable of supporting a static load of not less than six times the actual load supported. The joints to be evaluated include all manufacturer-assembled joints and user-affected joints. W
34、here it is not evident that the materials and dimensions of the parts involved have the specifi ed strength, the parts shall be subjected to the Overhead Product Static Loading Test, Section 37. Exception No. 1: The strength of a structural component or a joint is not required to be evaluated when f
35、ailure of the component or joint does not result in an object falling to the fl oor. Figure 8.1 Location and extent of barrier SEPTEMBER 9, 2005SUBJECT 1573-13- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for R
36、esale, 10/18/2006 02:56:39 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Exception No. 2: The structure and joints supporting a cardboard color gel frame secured by adhesive tape, or other accessory that presen
37、ts a low risk of injury when it falls to the fl oor, are not required to be evaluated. 9.2 A safety cable, safety chain, or other fi eld-installed backup-restraint device intended to catch a falling object shall be capable of supporting a static load of not less than six times the intended load. Whe
38、n it is not evident that the backup-restraint device is capable of supporting a weight of six times the marked maximum load weight, the device shall be subjected to the Backup Restraint-Device Loading Test, Section 38. 10 Lamp-Containment Barriers and UV Radiation Filters 10.1 General 10.1.1 The req
39、uirements in this section are supplementary to other applicable requirements in this standard and apply to stage and studio luminaires incorporating tungsten-halogen lamps and electric discharge lamps that are not provided with an integral glass outer envelope and that are of other than the fl uores
40、cent type. 10.2 Lamp-containment barriers 10.2.1 A luminaire intended for use with one of the following lamp types shall be provided with a lamp-containment barrier as defi ned in 3.30: a) A tungsten-halogen lamp. Exception:A luminaire intended for use with a non-pressurized, tungsten-halogen lamp f
41、or which the lamp manufacturer does not require an enclosure, or a tungsten-halogen lamp with an integral outer envelope, is not required to be provided with a lamp-containment barrier when the marking specifi ed in 58.4 is provided. b) A metal halide lamp Exception No. 1: A lamp-containment barrier
42、 is not required for a luminaire intended for use only with thick-glass parabolic refl ector (PAR) metal halide lamps. Exception No. 2: A lamp-containment barrier is not required for a luminaire that is: a) Intended for use only with a Type O lamp; b) Provided with a lampholder designed for use only
43、 with a Type O lamp; and c) Provided with the/Olamp type suffix orType Odesignation in the lamp replacement marking specifi ed in 58.5.1. b c) An electric discharge lamp that is not provided with an integral glass outer envelope and that is of other than the fl uorescent type. c d) A high-pressure l
44、amp as defi ned in 3.25. SEPTEMBER 9, 2005SUBJECT 1573-14- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/18/2006 02:56:39 MDTNo reproduction or networking permitted without license from IHS -,-,- F
45、OR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 10.2.2 A lamp-containment barrier shall be constructed of: a) Metal at least 0.41 mm (0.016 inch) thick; b) Glass, porcelain, or ceramic at least 3.0 mm (1/8 inch) thick for metric trade size glass; or c) Polymeric material having a relati
46、ve thermal index with impact at the involved thickness of not less than the temperature encountered on the lamp-containment barrier surface during the Temperature Test, Section 30. When a lamp-containment barrier also serves as an enclosure, the lamp-containment barrier shall also comply with applic
47、able enclosure thickness and other enclosure requirements. Exception:A lamp-containment barrier constructed of glass is not prohibited from being less than 3.0 mm thick but is to be at least 2.4 mm (3/32 inch) thick when it is intended for use with other than a high-pressure lamp and a lamp rated le
48、ss than 100 watts. 10.2.3 A lamp-containment barrier shall be secured in position by: a) A mechanical means that produces an interference fi t; b) Physical fi t; or c) Other means determined to be equivalent. 10.3 Tungsten-halogen lamps 10.3.1 A lamp-containment barrier shall not have any open holes greater than 3.2 mm (1/8 inch) thick diagonally or in diameter when the openings are line-of-sight between the lamp and any points outside the fi xture. Standard metal-wire mesh having 4 square openings per linear cm (16 square openings per linear inch) has been determined to comply with the