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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 1340 October 5, 2006 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. Editorial revisions including clarifi cation of scope, clarifi cation of terms and typographical corrections 2. Increase voltage r
2、atings for electrically powered hoists from 250 to 600 3. Revise Section 24 to clarify the strength test 4. Add requirements for polymeric enclosures in paragraphs 9.2.4, 9.2.5, 45.7 and 47.3 5. Add marking requirement for hoists COMMENTS DUE: NOVEMBER 3, 2006 For your convenience in review, propose
3、d additions to existing requirements are shown underlined and proposed deletions are shown lined-out. 1. Editorial revisions including clarifi cation of scope, clarifi cation of terms and typographical corrections RATIONALE Proposal submitted by: Edgar Wolff-Klammer, Underwriters Laboratories Inc. P
4、aragraph 1.2.1 is being added to include pneumatically powered hoists to the scope of the standard. Paragraph 3.4 is being revised to clarify that the hoists are for material lifting only. In addition, there has been some confusion of dead loads. Therefore, the list has been extended to this paragra
5、ph for clarifi cation. Paragraph 10.1.3 is being revised to update the cord references in accordance with the NEC. Paragraphs 10.1.4 is being revised to clarify the intent of the requirement. The ANSI designation is being deleted from the NEC reference in paragraphs 10.1.5 and 34.2. Paragraph 27.1 i
6、s being revised to clarify the defi nition of the term product. Paragraphs 47.1 and 47.2 are being revised to correct a typo. The term hook sheave should be hoist. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not fo
7、r Resale, 10/16/2006 20:44:09 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION PROPOSAL 1.2.1 This standard covers pneumatically powered hoists. 3.4 RATED WORKING LOAD The manufacturers specifi ed maximum load to
8、be lifted by the hoist. The maximum load includes the weight of all workers, materials, and all dead loads lifted by the hoist. Dead loads include the weight of: a) The hoist; b) Wire rope (winding drum and tail line) or chains; c) Rigging equipment/device(s) attached to the hoists bottom hook (e.g.
9、, slings, spreader bar/ beams); and Chains; or d) Ancilliary equipment supported by the hoist, such as the electrical cords, air supply hoses, chain container, etc. Electrical cords or air supply hoses. 10.1.3 A power-supply cord or extension cord shall be rated for a voltage not less than the rated
10、 voltage of the equipment and shall have a current rating not less than the current rating of the equipment. It that is made available for use with a hoist shall be of Type SJ, SJT, SO, SOO, ST, STO, or STOO or of a type at least equally serviceable for the particular application. 10.1.4 A hoist for
11、 outdoor use shall have a power-supply cord or extension cord shall comply that complies with the outdoor-use requirements specifi ed in the Standard for Cord Sets and Power-Supply Cords, UL 817. 10.1.5 A power-supply cord shall be for use at a voltage not less than the rated voltage of the hoist an
12、d shall have an ampacity, as determined in accordance with the National Electrical Code, ANSI/NFPA 70, of not less than the current rating of the hoist. 27.1 A cord-connected hoist product shall comply with the requirements for leakage current in Section 26, following exposure for 48 hours to air ha
13、ving a relative humidity of 88 2 percent at a temperature of 32 2C (90 4F). 34.2 When applying the Exception to 34.1 to a motor not rated in horsepower, the appropriate table of the National Electrical Code, ANSI/NFPA 70, is to be used which gives the relationships between horsepower and full-load c
14、urrents for motors. For a universal motor, the table applying to a single-phase, alternating-current motor is to be used if the motor is marked for use on alternating current only; otherwise, the table applying to direct-current motors is to be used. 47.1 A hoist shall be supplied with complete oper
15、ation and maintenance instructions. A copy of the instructions shall be used as a guide in the examination and test of the hook sheave hoist. 47.2 The instructions shall include all directions and information necessary for proper installation, maintenance, operation, and use of the hook sheave hoist
16、. 2. Increase voltage ratings for electrically powered hoists from 250 to 600 RATIONALE Proposal submitted by: Edgar Wolff-Klammer, Underwriters Laboratories Inc. OCTOBER 5, 2006SUBJECT 1340-2- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina Stat
17、e University/5618801100 Not for Resale, 10/16/2006 20:44:09 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Paragraph 1.2 of this standard states that it covers electrically powered hoists rated 250 volts or less
18、 to be employed in nonhazardous environmental locations. With the current fi le review for this standard manufacturers have advised that they produce hoists with higher voltage limits and would like these products also evaluated to UL 1340. Therefore, we are proposing to increase the voltage limit t
19、o 600 volts or less in accordance with the National Electrical Code, NFPA 70. Based on this proposal to increase the voltage, Tables 21.1, 30.1 and 42.1 will also need to be revised. PROPOSAL 1.2 This standard covers electrically powered hoists rated 250 600 volts or less to be employed in nonhazard
20、ous environmental locations in accordance with the National Electrical Code, NFPA 70. Table 21.1 Spacings at parts other than motor components and fi eld-wiring terminals LocationDistance Minimum spacings General 1 horsepower (746 watt output) or less, Safety controls,a51 150 volts,151 250 volts,251
21、 600 inch(mm)inch(mm)(inch)(mm)inch(mm)inch (mm) Between any uninsulated live part and an uninsulated live part of opposite polarity, an uninsulated grounded dead-metal part other than an enclosure, or an exposed dead metal part that is isolated (insulated). Through air or oil 1/83.21/46.4a3/89.51/1
22、61.6a1/83.2b Over surface1/46.43/89.5a1/212.71/83.2a1/46.4 Between any uninsulated live part and the walls of a metal enclosure including fi ttings for conduit or metal-clad cable.c Shortest distance 1/212.71/212.71/212.71/46.41/46.4 a In a safety control, the spacing between same polarity live part
23、s on opposite sides of a switching mechanism, except at contact point, shall not be less than 1/32 inch (0.8 mm) through air and 1/16 inch (1.6 mm) over surface. b In a safety control and equivalent, the spacing between wiring terminals regardless of polarity and the spacing between a wiring termina
24、l and a grounded dead metal part (including the enclosure) shall not be less than 1/4 inch (6.4 mm). c For the purpose of this requirement, a metal piece attached to the enclosure is considered to be a part of the enclosure if deformation of the enclosure is likely to reduce the spacing between the
25、metal piece and uninsulated live parts. OCTOBER 5, 2006SUBJECT 1340-3- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/16/2006 20:44:09 MDTNo reproduction or networking permitted without license from
26、 IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Table 30.1 (old) Values of supply voltage for tests Voltage rating of device and corresponding test potential, volts TestTest procedure reference110 120220 240 Leakage currentSection 26120240 InputSection 30120240 TemperatureSe
27、ction 31 AC120240 DC115230 Table 30.1 (Revised) Values of supply voltages for test Nameplate rating, voltsTest voltage, volts 110 120120 200 208208 220 240240 254 277277 440 480480 550 600600 30.2 For a product rated other than as specifi ed in Table 30.1, the voltage of the supply circuit is to be
28、the maximum rated voltage. Table 42.1 Production-line test conditions Product ratingCondition ACondition B Potential, voltsTime, secondsPotential, voltsTime, second 250 volts or less with a motor rated 1/2 horsepower (373 W) or less 10006012001 More than 250 volts or less with a motor rated more tha
29、n 1/2 horsepower (373 W) 1000 + 2Va601200 + 2.4Va1 a Maximum marked voltage but not less than 120 volts if the maximum marked voltage is within the range 105 120 volts, and not less than 240 volts if the maximum marked voltage is within the range 210 240 volts. 3. Revise Section 24 to clarify the st
30、rength test RATIONALE Proposal submitted by: Chris Hess, Harrington Hoists The national consensus safety standard for overhead material handling hoists is ASME B30.16. B30.16 specifi es that the powered hoists must be designed so that the stress in load suspension components does not exceed 20% of t
31、he materials ultimate strength. Many steels and alloy steels have a yield OCTOBER 5, 2006SUBJECT 1340-4- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/16/2006 20:44:09 MDTNo reproduction or network
32、ing permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION strength that is around 55% to 75% of ultimate. So, a component made of steel or alloy steel that meets the B30.16 requirement will begin deforming permanently when the applied load is around 3
33、 to 4 times the hoists rated capacity. This does not meet the strength requirement of the current UL 1340 standard. Furthermore, B30.16 invokes the national consensus performance standards for material handling hoists, which is the ASME-HST standard series. The HST standards states that elements spe
34、cifi cally provided to give visible warning of severe overload by structural deformation shall be designed so that the static stress calculated for the rated load shall not exceed 35% of the materials ultimate strength. Many material handling hoists have hooks which comply with this requirement, whi
35、ch means they will begin permanent deformation at around 2.8 times the hoists rated capacity. This does not meet the strength requirement of the current UL 1340 standard. PROPOSAL 24.1 A hoist, while suspended, is to be loaded for 5 minutes to four 2.5 times its rated working load to the cable or ch
36、ain. The load is to be applied as intended for normal working conditions for which the hoist was designed so that the test load will be transmitted throughout the hoist, except that elements specifi cally provided to give visible warning of severe overload by structural deformation shall be excluded
37、 from this test. In excluding such elements from the test, the confi guration of the hoist for the test shall be as close as possible to the design condition, excepting the exclusion of such elements. During the test, no No load-bearing component of a hoist shall give way, permanently deform, or wea
38、ken. After the test load is released, the hoist components shall operate as intended. 24.3 The test load is to be applied at the point of intended loading in such a way that the test load will be transmitted throughout the hoist. 4. Add requirements for polymeric enclosures in paragraphs 9.2.4, 9.2.
39、5, 45.7 and 47.3 RATIONALE Proposal submitted by: Edgar Wolff-Klammer, Underwriters Laboratories Inc. The appendix of UL 1340 references UL 746C. To help clarify the requirements for an enclosure made of polymeric materials, paragraphs 9.2.4, 9.2.5 and 45.7 are proposed to be added. Paragraph 47.3 i
40、s being revised to reference the marking requirement in 45.7. PROPOSAL 9.2.4 An enclosure of polymeric material shall comply with the applicable requirements for products that are not categorized as household use only as contained in the Standard for Polymeric Materials Use in Electrical Equipment E
41、valuations, UL 746C. 9.2.5 An enclosure of polymeric material shall be subjected to the Resistance to Impact Test described in UL 746C before and after cold conditioning at minus 35C (minus 31F) for 3 hours. For products marked in accordance with 45.6, the cold conditioning shall be at 0C (32F) for
42、3 hours. After each test, the enclosure shall comply with 9.1.1. Exception:A product marked in accordance with 45.7 is not required to be subjected to the cold conditioning. OCTOBER 5, 2006SUBJECT 1340-5- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Ca
43、rolina State University/5618801100 Not for Resale, 10/16/2006 20:44:09 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 45.7 A product intended for indoor use only shall be marked with the word CAUTION and the fol
44、lowing or equivalent: To Reduce the Risk of Electric Shock or Injury, Use Indoors Only. in letter height not less than 3/32 in (2.4 mm). This marking shall also be included in the instruction manual in accordance with 47.3(d). 47.3 Any abbreviated form of instructions shall include: a) A brief summa
45、ry of how to operate the hoist; b) Instructions for daily inspection of the equipment; and c) Reference to the operators manual for detailed instructions.; and d) A product marked in accordance with 45.7 shall have the statement For Indoor Use Only or the equivalent appearing in the instruction manu
46、al. 5. Add marking requirement for hoists RATIONALE Proposal submitted by: Edgar Wolff-Klammer, Underwriters Laboratories Inc. In paragraph 33.1 it states, “A hoist rated for outdoor use shall be subjected to a water spray for 1-hour exposures.” Currently, a user would not know if the hoist should o
47、nly be used indoors. Therefore, the additional marking requirement in paragraph 45.6 is being proposed. PROPOSAL 45.6 A hoist not intended to be exposed to rain shall be marked with the word CAUTION and the following or equivalent: To reduce the risk of electric shock, do not expose to rain. Store i
48、ndoors. Copyright 2006 Underwriters Laboratories Inc. OCTOBER 5, 2006SUBJECT 1340-6- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/16/2006 20:44:09 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 1340 August 30, 2006 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. For Preliminary Review Only: Editorial revisions including clar