UL-484-BULLETINS-2001.pdf
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1、Subject 484, (474, 1699) (in reply, refer to Subject 484) 333 Pfingsten Road Northbrook, IL 60062 November 9, 2001 TO: Standards Technical Panel (STP) for Dehumidifiers and Room Air Conditioners, STP Subscribers to ULs Standards Service for 474; Room Air Conditioners; Arc-Fault Circuit-Interrupters;
2、 Other Interested Parties SUBJECT: Request for Comments on Proposed Requirements for the Seventh Edition of the Standard for Room Air Conditioners, UL 484; PROPOSED EFFECTIVE DATES INSTRUCTIONS STP Members: If you are a voting member of the STP, complete the attached ballot with your vote on the sta
3、ndard or proposals. Please note that all negative ballots must be accompanied by supporting written reasons and, where possible, proposals for a solution to the problem raised. Impact statements and effective date information are not subject to letter ballot. Therefore, comments regarding impact sta
4、tements and effective dates that are made should be sent to the STP Secretary separate from the letter ballot. Subscribers and other interested parties: If you are a subscriber or other interested party, you are requested to send comments on the proposed requirements, impact statements, and proposed
5、 effective date to the STP Secretary. The STP member ballot should not be used to submit your comments. Comments should be made in writing and may be sent by fax to 847-313-3416 or by mail to the attention of Jeff Prusko at ULs Northbrook office. Comments may also be sent via E-mail to Jeffrey.P. Pl
6、ease reference all correspondence to Subject 484. Note all comments received are public and may be circulated to others. If you respond by fax or E-mail, please include your full name and company name and address to ensure a reply. SUMMARY OF TOPICS This bulletin proposes the following changes in re
7、quirements: 1. Addition of fault protection for power supply cords employed on room air conditioners. 2. Addition of international marking symbols for “of and “on.“ Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not
8、for Resale, 06/18/2007 23:45:50 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 484 -2- NOVEMBER 9,2001 STP BALLOTS AND ALL COMMENTS DUE: February 7,2002 Attached as Appendix A for your review and comment are proposed requirements for UL 484. Attached as Appendix B
9、for your review and comment are the impact statements and proposed effective dates. Attached as Appendix C and Appendix D and E are the STP membership roster and the STP ballot, respectively. Questions regarding interpretation of requirements should be directed to the responsible UL Staff. Please se
10、e Appendix F of this bulletin regarding designated responsibility for the subject product categories. Please note that proposed requirements are of a tentative and early nature and are for review and comment only. Current requirements are to be used to judge a product until these requirements are pu
11、blished in final form. PRODUCTSANDINDUSTRIESAFFECTED BYTHE PROPOSAL UL requests your assistance in identifying other products or industries that might be affected by the requirements contained in this bulletin. UL suggests that all suppliers or customers for these products and industries be made awa
12、re of these requirements prior to their proposed effective date. Also, please forward your suggestions to UL so that these products and industries may be identified in future bu I let ins. Unless specifically requested to do so, UL will not acknowledge comments indicating concurrence with these prop
13、osals. UNDERWRITERS LABORATORIES INC. REVIEWED BY: JEFF PRUSKO Secretary for STP 474 Project Engineer Standards Department Phone: 847-664-341 6 Fax: 847-31 3-341 6 E-mail: Jeffrey.P http:/ ANTHONY ZAGONE Interim Chair for STP 474 Conformity Assessment Services 301 3XNBK Phone: 847-664-3222 SR: AM, J
14、M Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 06/18/2007 23:45:50 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 484 -Al- NOVEMBER 9,2001 APPENDIX A RATIONALE AND
15、 PROPOSED REQUIREMENTS FOR THE SEVENTH EDITION OF THE STANDARD FOR ROOM AIR CONDITIONERS, UL 484 For your convenience in review, proposed additions to existing requirements are shown underlined and proposed deletions are shown tmd-e& . Proposed new requirements are identified by (NEW). In the case o
16、f extensively revised paragraphs, the original text is identified by (CURRENT) and is tmd-e&, followed by the proposed text identified by (PROPOSED). A paragraph that is proposed to be deleted is identified by (DELETED) and is shown tmd-e&. 1. ARC-FAULT CIRCUIT-INTERUPPTER (AFCI) AND LEAKAGE-CURRENT
17、 DETECTOR- INTERRUPTER (LCDI) PROTECTION FOR POWER SUPPLY CORDS DISCUSSION Power supply cords on room air conditioners can be subjected to abuse during the products life. Semi-annual installation, improper installation and storage and abuse in transporting the unit can fatigue the power supply cord
18、resulting in insulation and conductor degradation. The result of this abuse can be series and parallel faults within the cord, which could increase the risk of combustion of the cord insulating materials or surrounding combustible materials. RATIONALE Evidence has been provided to suggest that the u
19、se of power supply cords which provide protection against combustion of the cord and surrounding material caused by series or parallel arcing faults within the cord itself on room air conditioners may result in improved safety in the use of these products. Room air conditioners are most commonly ins
20、talled in existing, older occupancies for which there are indications of higher incidence of fires than in newer constructions. As there are no published requirements for LCDls, and as many of the requirements contained in the Standard for Arc-Fault Circuit-Interrupters, UL 1699, apply to LCDls, UL
21、has proposed to add LCDls to the scope of UL 1699, and to revise the Standard accordingly, which is evidenced in the Subject 1699 bulletin dated October 26, 2001. This also correlates with revisions to the National Electrical Code (NEC), ANSVNFPA-70, requiring factory installed LCDI or AFCI protecti
22、on for single phase cord- connected room air conditioners. PROPOSAL 3.15 ARC-FAULT CIRCUIT-INTERRUPTER (AFCI) - A device intended to mitiaate t he effects o f arcing faults bv functionina to dee neraize the circuit when an arc-fault is detected. 3.1 6 LEAKAGE-CURRENT DETECTOR-INTERRUPTER (LCDI) - A
23、device that senses leakaae current flowina between or from the attached cord conductors and interrmts the circuit at a predetermined level of leakaae current. LCDls are not mohibited from havina intearal cord sets or power sumlv cords. Copyright Underwriters Laboratories Inc. Provided by IHS under l
24、icense with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 06/18/2007 23:45:50 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 484 -A2- NOVEMBER 9,2001 11.2 Cord-connected units 11.2.1 A room air conditioner intended for cord connection to th
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