1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 464A Audible Signal Appliances for General Signaling Use STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYR
2、IGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Audible Signal Appliances for General Signaling Use, UL 464A First Edition, Dated February 3, 2016 Summary of Topics This is the First Edition of the Standard for Safety for
3、Audible Signal Appliances for General Signaling Use, UL 464A that covers signaling devices intended only for general use. The new requirements are substantially in accordance with Proposal(s) on this subject dated October 9, 2015. All rights reserved. No part of this publication may be reproduced, s
4、tored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warr
5、anties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even i
6、f UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend,
7、indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. FEBRUARY 3, 2016 UL 46
8、4A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 3, 2016 UL 464A tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 3, 2016 1 UL 464A Stan
9、dard for Audible Signal Appliances for General Signaling Use Prior to this rst edition, the requirements for the products covered by this standard were included in the Standard for Audible Signaling Appliances, UL 464. First Edition February 3, 2016 This ANSI/UL Standard for Safety consists of the F
10、irst Edition. The most recent designation of ANSI/UL 464A as an American National Standard (ANSI) occurred on February 3, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. Comments or proposals for revisions on any part of the Standard may be submi
11、tted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standa
12、rds and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 464A-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRU
13、ARY 3, 2016 AUDIBLE SIGNAL APPLIANCES FOR GENERAL SIGNALING USE - UL 464A 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .6 CONSTRUCTION 2 General 6 2.1 Components .6 2.2 Units of measurem
14、ent .7 2.3 Undated references .7 2.4 Electrical circuits terminology 7 3 Enclosures .7 3.1 General .7 3.2 Cast metal .9 3.3 Sheet metal 10 3.4 Nonmetallic .10 3.5 Ventilating openings .11 4 Electric Shock .13 5 Protection Against Corrosion 13 6 Field Wiring System Connections 14 6.1 General 14 6.2 C
15、ompartment .14 6.3 Terminals or leads .14 6.4 Grounding terminals and leads 15 6.5 Grounded supply terminals and leads 15 7 Internal Wiring .16 7.1 General 16 7.2 Wireways .16 7.3 Splices .17 7.4 Barriers 17 7.5 Bushings .17 7.6 Strain relief .18 8 Bonding for Grounding .18 9 Components 20 9.1 Mount
16、ing .20 9.2 Operating parts .20 9.3 Current carrying parts 21 9.4 Coil windings .21 9.5 Connectors and receptacles 21 9.6 Electrical insulating material 21 9.7 Motors .22 10 Spacings 23 FEBRUARY 3, 2016 AUDIBLE SIGNAL APPLIANCES FOR GENERAL SIGNALING USE - UL 464A 3UL COPYRIGHTED MATERIAL NOT AUTHOR
17、IZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PERFORMANCE ALL APPLIANCES 11 General 24 11.1 Test samples 24 11.2 Test voltages 25 11.3 Temperature measurements .25 11.4 Additional tests 26 12 Current Input Test 26 13 Overvoltage and Undervoltage (Current) Test 27 13.1 Over
18、voltage (current) test .27 13.2 Undervoltage (current) test 27 14 Variable Ambient Temperature Test .27 15 Polarity Reversal Test .27 16 Component Temperature Test 27 17 Electric Shock Current Test 30 18 Endurance Test 34 19 Transient Test 34 19.1 General .34 19.2 Supply-line transients (high-voltag
19、e appliances) 34 20 Jarring and Vibration Tests 35 20.1 Jarring Test 35 20.2 Vibration test 35 21 Dielectric Voltage-Withstand Test .36 22 Burnout Test .37 23 Polymeric Materials Test .37 23.1 General .37 23.2 Temperature test .37 23.3 Flame test .37 23.4 Impact test 39 24 Locked Rotor Test 39 24.1
20、General .39 24.2 Thermal or overcurrent protection 39 24.3 Impedance protection .40 25 Elastomeric Materials Tests 41 25.1 General .41 25.2 Accelerated aging by oven-conditioning method 41 25.3 Accelerated aging of exible cellular materials .41 INDOOR USE APPLIANCES 26 Humidity Test 42 OUTDOOR USE A
21、PPLIANCES 27 General 42 28 Rain Test 43 29 Variable Ambient Temperature Test .46 30 Humidity Test 46 FEBRUARY 3, 2016 AUDIBLE SIGNAL APPLIANCES FOR GENERAL SIGNALING USE - UL 464A 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MANUFACTURIN
22、G AND PRODUCTION TESTS 31 Production-Line Dielectric Voltage-Withstand Test 46 32 Production-Line Grounding-Continuity Test for High-Voltage, Cord-Connected Products .47 RATING 33 General 47 INSTALLATION AND OPERATING INSTRUCTIONS 34 General .48 MARKING 35 General 48 APPENDIX A Standards for Compone
23、ntsA1 FEBRUARY 3, 2016 AUDIBLE SIGNAL APPLIANCES FOR GENERAL SIGNALING USE - UL 464A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover electrically and electronically operated bells, buzzers,
24、horns, and similar audible signal appliances, rated 300 volts or less, for commercial general signaling service and intended for indoor or outdoor locations or both in accordance with the National Electrical Code, NFPA 70. 1.2 These requirements cover audible signal appliances for use in ordinary lo
25、cations. Audible signal appliances for use in hazardous locations, as dened in the National Electrical Code, NFPA 70, are judged on the basis of their compliance with these requirements and further appropriate examination and tests to determine if they are acceptable for such use. 1.3 These requirem
26、ents do not cover door bells, buzzers, and chimes used in household and similar applications and intended for operation on Class 2 signal circuits as dened in the National Electrical Code, NFPA 70. 1.4 These requirements do not cover audible signaling appliances intended for re alarm or emergency co
27、mmunications use as dened by the National Fire Alarm and Signaling Code, NFPA 72. 1.5 A supplemental visual signal incorporated as part of an audible signal appliance shall also comply with the requirements of this Standard. CONSTRUCTION 2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2, a
28、 component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components generally used in the products covered by this standard. 2.1.2 A component is not required to comply with a specic requirement that: a) I
29、nvolves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.1.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.1.4 Spe
30、cic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. FEBRUARY 3, 2016 AUDI
31、BLE SIGNAL APPLIANCES FOR GENERAL SIGNALING USE - UL 464A 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approxi
32、mate information. 2.2.2 Unless otherwise indicated, all voltage and current values mentioned in this standard are root-mean-square (rms). 2.3 Undated references 2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the l
33、atest edition of that code or standard. 2.4 Electrical circuits terminology 2.4.1 For the purpose of these requirements, electrical circuit characteristics are dened as follows: a) Low-Voltage Circuit A circuit involving a potential of not more than 30 volts alternating current, 42.4 volts (AC) peak
34、 or direct current (DC), and supplied from a circuit whose power is limited to a maximum of 100 volt-amperes. b) High-Voltage Circuit A circuit having circuit characteristics in excess of those of a low- voltage circuit. 2.4.2 The term appliance as used in this standard refers to any equipment cover
35、ed by this standard. 3 Enclosures 3.1 General 3.1.1 Electrical parts of an appliance shall be located or enclosed so that protection against contact with uninsulated live parts is provided. 3.1.2 An appliance intended to be installed on a ush-device box, cutout box, one provided for outdoor use, or
36、similar device, is to be judged with respect to compliance of the combination with the requirements of 3.1.1. 3.1.3 An operating part, such as a gear mechanism, light-duty relay, or similar device, shall be protected against mechanical damage and fouling by dust or other material which impairs its i
37、ntended operation. 3.1.4 The enclosure of an appliance shall be provided with means for mounting in the intended manner. Any ttings, such as brackets, hangers, or similar hardware required for mounting shall be furnished with the appliance. The mounting means shall be accessible without disassembly
38、of any operating part of the appliance. The removal of a completely assembled panel, cover, or similar part, to mount the appliance is not considered to be disassembly of an operating part. FEBRUARY 3, 2016 AUDIBLE SIGNAL APPLIANCES FOR GENERAL SIGNALING USE - UL 464A 7UL COPYRIGHTED MATERIAL NOT AU
39、THORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.1.5 An enclosure shall have provision for the connection of metal-clad cable, conduit, or nonmetallic sheathed cable. An enclosure without such provision is permitted when: a) It is furnished with denite instructions indi
40、cating the sections of the enclosure which are intended to be drilled in the eld for the connection of raceways, b) The appliance is intended for mounting on an outlet box, or c) The enclosure is intended for use with a low-voltage rated appliance for general signaling use. 3.1.6 A cover or other de
41、tachable part of the enclosure shall be secured in place with means not requiring use of a tool for removal. Using only snap-catch fastenings to secure this part is not permitted. 3.1.7 Except as noted in 3.1.8, an appliance intended for either ush or surface mounting in a back box shall be provided
42、 with a back box of sheet metal of a thickness as specied in Table 3.1 or 3.2. Table 3.1 Thickness of sheet metal Maximum dimensions of enclosure Minimum thickness of sheet metal Steel Copper, brass or aluminum, Group Length or width, Area, Zinc-coated, Uncoated, inch (mm) inch 2 (cm 2 ) inch (mm) i
43、nch (mm) inch (mm) A 3 76.2 6 a 39 0.025 0.64 b 0.021 0.53 b 0.023 0.58 c B 8 203 36 232 0.030 0.76 b,d 0.027 0.69 b,d 0.036 0.91 d C 12 305 90 581 0.034 0.86 d 0.032 0.81 d 0.045 1.14 d a Volume of enclosure not more than 12 cubic inches (197 cm 3 ). b Sheet steel for an enclosure intended for outd
44、oor use (rain-tight) is required to be not less than 0.036 inch (0.91 mm) in thickness if zinc coated and not less than 0.032 inch (0.81 mm) in thickness if uncoated. c Sheet copper, brass, or aluminum for an enclosure intended for outdoor use (rain-tight) is required to be not less than 0.029 inch
45、(0.74 mm) in thickness. d For a cover in Group B or C having a supporting frame or equivalent reinforcing and not intended for outdoor use, the thickness of sheet steel may be less than that specied in the table but shall be not less than 0.021 inch (0.53 mm) 0.025 inch (0.64 mm) if zinc coated, and
46、 the thickness of copper, brass, or aluminum may be less than that specied in the table but shall be not less than 0.029 inch (0.74 mm). FEBRUARY 3, 2016 AUDIBLE SIGNAL APPLIANCES FOR GENERAL SIGNALING USE - UL 464A 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WIT
47、HOUT PERMISSION FROM UL Table 3.2 Cast-metal electrical enclosures Use, or dimensions of area involved Minimum thickness Die-cast metal, Cast metal of other than the die-cast type, inch (mm) inch (mm) Area of 24 square inches (155 cm 2 ) or less and having no dimension greater than 6 inches (152 mm)
48、 1/16 a 1.6 1/8 3.2 Area greater than 24 square inches (155 cm 2 ) or having any dimension greater than 6 inches (152 mm) 3/32 2.4 1/8 3.2 At a threaded conduit hole 1/4 6.4 1/4 6.4 At an unthreaded conduit hole 1/8 3.2 1/8 3.2 a The area limitation for metal 1/16 inch (1.6 mm) in thickness may be o
49、btained by the provision of reinforcing ribs subdividing a larger area. 3.1.8 An appliance with means for attachment to a standard outlet box, having spacings after mounting on such a box as required in Spacings, Section 10, is not required to have a back box. 3.1.9 Space shall be provided within a terminal or wiring compartment to permit the use of a standard conduit bushing on conduit connected to the compartment when a bushing is required for installation. 3.2 Cast metal 3.2.1 The thickness of cast metal u
