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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 141 March 2, 2007 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. Recognition of the Eighth Edition of the Standard for Garment Finishing Appliances, UL 141, as an American National Standard. No subs
2、tantive changes have been made to the standard. STP BALLOTS 2) The protection provided with the motor is such that no burning insulation or molten material falls to the surface that supports the appliance when the motor is energized under each of the following fault conditions: i) Open main winding;
3、 ii) Open starting winding; iii) Starting switch short-circuited; and iv) Capacitor of permanent-split capacitor motor short circuited the short- circuit is to be applied before the motor is energized, and the rotor is to be locked; MARCH 2, 2007SUBJECT 141-4- Copyright Underwriters Laboratories Inc
4、. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 22:56:48 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 3) The motor is provided with a ther
5、mal motor protector a protective device that is sensitive to temperature and current that will prevent the temperature of the motor windings from exceeding 125C (257F) under the maximum load under which the motor will run without causing the protector to cycle and from exceeding 150C (302F) with the
6、 rotor of the motor locked; or 4) The motor complies with the requirements in the Standard for Overheating Protection for Motors, UL 2111, and the temperature of the motor winding will not exceed 150C (302F) during the fi rst 72 h of operation with the rotor of the motor locked. b) Under wiring, unl
7、ess it complies with the VW-1 fl ame test. 5.10 The barrier mentioned in 5.9 shall be horizontal, and shall be located and have an area at least as illustrated in Figure 5.1. Openings for drainage, ventilation, and the like may be employed in the barrier, provided such openings will not permit molte
8、n metal, burning insulation, or the like to fall on combustible material. This is generated text for fi gtxt. MARCH 2, 2007SUBJECT 141-5- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 22:5
9、6:48 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Figure 5.1 Location and extent of barrier NOTES A Region to be shielded by barrier. This will consist of the entire component if it is not otherwise shielded a
10、nd will consist of the unshielded portion of a component that is partially shielded by the component enclosure or equivalent. B Projection of outline of component on horizontal plane. C Inclined line that traces out minimum area of barrier. The line is always (1) tangent to the component, (2) 5 from
11、 the vertical, and (3) so oriented that the area traced out on a horizontal plane is maximum. D Location (horizontal) and minimum area for barrier. The area is that included inside the line of intersection traced out by the inclined line C and the horizontal plane of the barrier. MARCH 2, 2007SUBJEC
12、T 141-6- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 22:56:48 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE D
13、ISTRIBUTION 5.11 A component of an appliance that is likely to need inspection, replacement, cleaning, or other servicing shall be as accessible as practicable, without: a) Using a special tool a tool available only to service personnel or b) Moving the appliance after installation as intended. 5.12
14、 A door or a cover of an enclosure that provides access to any overload-protective device that requires resetting or renewal shall be hinged or equivalently attached. 5.13 Means shall be provided for holding the door or cover over a fuseholder in a closed position, and the door or cover shall be tig
15、ht-fi tting. 5.14 The bulb and capillary tube of a thermostat shall be protected against mechanical damage if such damage of the tube or bulb may result in a risk of fi re. 6 Handles 6.1 A handle that may be folded for storage or for traveling convenience shall be provided with a means to lock the h
16、andle in the normal operating position. 6.2 The means to actuate a mechanism that requires a positive motion by the operator to lock the handle in the operating position shall be evident. 6.3 A positive motion by the operator shall be required to release the locking mechanism to fold the handle. The
17、 release mechanism shall be designed and located so as to reduce the possibility of unintentional release. This will usually require that the release mechanism not be associated with the gripping area of the handle. 7 Provision for Mounting 7.1 The enclosure of an appliance that is intended for perm
18、anent connection to the power supply shall be provided with means for mechanical mounting as intended, if applicable, and shall be furnished with any necessary fi ttings such as brackets, hangers, or the like. 8 Mechanical Assembly 8.1 An appliance shall be assembled so that it will not be adversely
19、 affected by the vibration of normal operation. Brush caps shall be tightly threaded or otherwise protected against loosening. 8.2 A switch other than a through-cord switch, a lampholder, a motor-attachment plug, and similar components shall be mounted securely, and shall be prevented from turning o
20、r shifting. See 8.4. Exception No. 1: A switch need not be prevented from turning if all four of the following conditions are met: a) The switch is a plunger or other type that does not tend to rotate when operated a toggle switch is considered to be subject to forces that tend to rotate the switch
21、during normal operation of the switch; b) The means of mounting the switch makes it unlikely that operation of the switch will loosen it; MARCH 2, 2007SUBJECT 141-7- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not
22、 for Resale, 03/16/2007 22:56:48 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION c) Spacings are not reduced below the minimum acceptable values if the switch does rotate; and d) Normal operation of the switch is
23、 by mechanical means rather than direct contact by persons. Exception No. 2: A lampholder in which the lamp cannot be replaced, such as a neon pilot or indicator light in which the lamp is sealed in a nonremovable jewel, need not be prevented from turning if rotation cannot reduce spacings below the
24、 minimum acceptable values. 8.3 An uninsulated live part shall be secured to the base or mounting surface so that it will be prevented from turning or shifting in position if such movement may result in a reduction of spacings below the minimum acceptable values specifi ed in Spacings, Section 24. 8
25、.4 The means for preventing the turning mentioned in 8.2 and 8.3 is to consist of more than friction between surfaces for example, a properly applied lock washer is an acceptable means for preventing a small stem-mounted switch or other device having a single-hole mounting means from turning. 8.5 A
26、cord-connected appliance that may be laid on combustible material shall be provided with a stand upon which it may be placed when not in use, unless the temperatures attained by the appliance during the Temperature Test, Section 32, do not exceed the surface temperatures specifi ed in Table 32.1. 8.
27、6 The stand required by 8.5 may be a separate device or integral to the appliance. 9 Protection Against Corrosion 9.1 An iron or steel part shall be protected against corrosion by painting, galvanizing, plating, or other equivalent means, if corrosion of the unprotected part would be likely to resul
28、t in the risk of fi re, electric shock, or injury to persons. Exception No. 1: A sheet-steel surface within an appliance need not be protected against corrosion if oxidation is not likely to be accelerated due to exposure to air and moisture or other oxidizing infl uences thickness of metal and temp
29、erature also being considered. Exception No. 2: Cast-iron parts need not be protected against corrosion. Exception No. 3: A sheath employed on a heating element operating in air and a terminal part attached directly to a heating element need not be protected against corrosion. 9.2 Deterioration of t
30、he plating or other fi nish due to aging shall not result in any condition that will adversely affect the operation of the appliance. 10 Accessibility of Uninsulated Live Parts 10.1 Electrical parts of an appliance shall be located or enclosed so that protection against unintentional contact with un
31、insulated live parts will be provided. Insulated brush caps are not required to be additionally enclosed. MARCH 2, 2007SUBJECT 141-8- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 22:56:48
32、 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 10.2 During the examination of an appliance in connection with the requirements in 10.1, a part of the outer enclosure that may be removed, without the use of tool
33、s, by the user of the appliance to permit the attachment of accessories, to allow access to means for making operating adjustments, or for another reason is to be disregarded that is, it will not be assumed that the part in question affords protection against electric shock. 10.3 An opening anywhere
34、 in the enclosure of a hand-supported appliance or in any portion of an appliance hand-held in normal use is acceptable if a probe as illustrated in Figure 10.1, when inserted point fi rst as far as possible into the opening, does not enter the opening for a distance of more than 1/8 in (3.2 mm) and
35、 does not touch any uninsulated live part or fi lm-coated wire. This is generated text for fi gtxt. 10.4 In the enclosure of an appliance other than as described in 10.3: a) An opening that will not permit entrance of a 3/4-in (19.1-mm) diameter rod is acceptable if: 1) A probe as illustrated in Fig
36、ure 10.2 cannot be made to touch any uninsulated live part when inserted through the opening, and 2) A probe as illustrated in Figure 10.3 cannot be made to touch fi lm-coated wire when inserted through the opening. Figure 10.1 Probe for hand-supported enclosure MARCH 2, 2007SUBJECT 141-9- Copyright
37、 Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 22:56:48 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION b) An
38、opening that will permit entrance of a 3/4-in diameter rod is acceptable under the conditions described in 10.5 and illustrated in Figure 10.4. This is generated text for fi gtxt. This is generated text for fi gtxt. Figure 10.2 Probe for uninsulated live part MARCH 2, 2007SUBJECT 141-10- Copyright U
39、nderwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 22:56:48 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION This is
40、generated text for fi gtxt. Figure 10.3 Probe for fi lm-coated wire Figure 10.4 Opening in enclosure NOTE Proportions exaggerated for clarity. MARCH 2, 2007SUBJECT 141-11- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bern
41、ie Not for Resale, 03/16/2007 22:56:48 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 10.5 The opening illustrated in Figure 10.4 is acceptable if, within the enclosure, there is no uninsulated live part or fi l
42、m-coated wire less than X distance from the perimeter of the opening, as well as within the volume generated by projecting the perimeter distance X normal to its plane. X equals fi ve times the diameter of the largest round rod that can be inserted through the opening, but not less than 4 in (102 mm
43、). In evaluating an opening, any barrier located within the volume usually is ignored unless it intersects the boundaries of the volume in a continuous, closed line. 11 Supply Connections 11.1 Permanently connected appliance 11.1.1 General 11.1.1.1 Except as noted in 14.1.2, an appliance intended fo
44、r permanent connection to the power supply shall have provision for connection of one of the wiring systems that would be acceptable for the appliance. 11.1.1.2 A stationary appliance may be acceptable if provided with not more than 8 ft (2.44 m) of Type S, SO, ST, or STO cord and an attachment plug
45、 for supply connection. The investigation of such a feature is to include consideration of the intended use of the appliance and the necessity of having it readily detachable from its source of supply by means of a plug. 11.1.2 Terminal compartment 11.1.2.1 A terminal box or compartment in which pow
46、er-supply connections to a permanently connected appliance are to be made shall be located so that the connections may be readily inspected after the appliance is installed as intended. 11.1.2.2 A terminal compartment intended for connection of a supply raceway shall be attached to the appliance so
47、as to be prevented from turning. 11.1.3 Wiring terminals and leads 11.1.3.1 A permanently connected appliance shall be provided with wiring terminals for the connection of conductors having an ampacity acceptable for the appliance; or the appliance shall be provided with leads for such connection. 1
48、1.1.3.2 A fi eld-wiring terminal is considered to be a terminal to which a wire may be connected in the fi eld, unless the wire and a means of making the connection a pressure terminal connector, soldering lug, soldered loop, crimped eyelet, or the like that is factory-assembled to the wire are provided as a part of the appliance. 11.1.3.3 An appliance equipped with terminals or leads for fi eld connection of power-supply conductors shall be provided with a terminal or lead that is located in