1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 38 Manual Signaling Boxes for Fire Alarm SystemsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZ
2、ED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Manual Signaling Boxes for Fire Alarm Systems, UL 38 Eighth Edition, Dated July 3, 2008 Summary of Topics This revision of ANSI/UL 38 is being issued to reect the reaffirmation of the ANSI approval of t
3、he Standard. No technical changes have been made to the document. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. The revisions are substantially in accordance with Proposal(s) on this subject dated October 4, 201
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8、ronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for re
9、quirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. NOVEMBER 27, 2013 UL 38 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER
10、 27, 2013 UL 38 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 3, 2008 (Title Page Reprinted: November 27, 2013) 1 UL 38 Standard for Manual Signaling Boxes for Fire Alarm Systems First Edition June, 1964 Second
11、 Edition December, 1969 Third Edition March, 1974 Fourth Edition July, 1981 Fifth Edition June, 1987 Sixth Edition January, 1994 Seventh Edition March, 1999 Eighth Edition July 3, 2008 This ANSI/UL Standard for Safety consists of the Eighth Edition including revisions through November 27, 2013. The
12、most recent designation of ANSI/UL 38 as a Reaffirmed American National Standard (ANS) occurred on November 27, 2013. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions on any part of the Sta
13、ndard may be submitted 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.
14、 All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 38-2005 (R2013)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT
15、PERMISSION FROM UL JULY 3, 2008 MANUAL SIGNALING BOXES FOR FIRE ALARM SYSTEMS - UL 38 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 General 5 2.1 Components .5 2.2 Units of measureme
16、nt .6 2.3 Undated references .6 CONSTRUCTION 3 Enclosures .6 3.1 General .6 3.2 Cast metal enclosures 7 3.3 Sheet metal enclosures .8 3.4 Nonmetallic enclosures 9 4 Electric Shock 9 5 Corrosion Protection .10 6 Field-Wiring System Connection .10 6.1 General 10 6.2 Field-wiring compartment .11 6.3 Fi
17、eld-wiring terminals or leads 11 6.4 Grounding terminals and leads 12 6.5 Grounded supply terminals and leads 12 6.6 Strain relief .13 7 Internal Wiring .13 7.1 General 13 7.2 Wireways .14 7.3 Splices .14 7.4 Barriers 14 7.5 Bushings .14 8 Bonding for Grounding .15 9 Components 16 9.1 Current-carryi
18、ng parts 16 9.2 Coil windings .17 9.3 Insulating material .17 9.4 Printed-wiring boards 18 9.5 Switches .18 9.6 Lampholders and lamps 18 9.7 Protective devices .18 9.8 Mounting of components .18 9.9 Operating components .20 9.10 Capacitors .20 10 Spacings 20 11 Servicing Protection .22 12 Outdoor-Us
19、e Signaling Boxes 22 JULY 3, 2008 MANUAL SIGNALING BOXES FOR FIRE ALARM SYSTEMS - UL 38 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PERFORMANCE 13 General 23 14 Normal Operation Test 23 14.1 General .23 14.2 Coded signaling boxes 24 14.
20、3 Non-coded signaling boxes 25 14.4 Watchmans suppressed-signaling tour devices 26 15 Circuit Emergency Operation .27 16 Overcurrent and Undercurrent Operation Test 27 17 Overload and Endurance Test 27 17.1 General .27 17.2 Watchmans suppressed-signaling tour devices 29 18 Jarring Test 29 19 Drop Te
21、st 30 20 Temperature Test .30 21 Electric Shock Current Test 33 22 Corrosion Tests 37 22.1 General .37 22.2 Indoor-use signaling boxes 37 22.3 Outdoor-use signaling boxes 37 23 Transient Test 38 24 Dielectric Voltage-Withstand Test .39 25 Abnormal Operation Test 40 26 Burnout Test .40 27 Impact Test
22、 for Enclosures .41 28 Polymeric Materials Tests 41 29 Outdoor-Use Signaling Box Tests .41 29.1 General .41 29.2 Water spray test .41 29.3 Variable temperature test 41 29.4 Humidity test .42 MANUFACTURING AND PRODUCTION-LINE TEST 30 Production-Line Dielectric Voltage-Withstand Test 42 MARKING 31 Gen
23、eral 43 32 Installation Wiring Diagram .44 APPENDIX A Standards for ComponentsA1 JULY 3, 2008 MANUAL SIGNALING BOXES FOR FIRE ALARM SYSTEMS - UL 38 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements
24、cover manual signaling boxes for re alarm systems intended for permanent installation and used in ordinary locations in accordance with the National Electrical Code, NFPA 70, and the National Fire Alarm Code, NFPA 72. 1.2 A manual signaling box is an assembly of a mechanism having electrical contact
25、s designed to transmit a signal when an integral part is operated manually. The signaling contacts are intended to be connected to circuits of re alarm systems. The types of boxes covered by these requirements are coded boxes and non-coded boxes, including signaling boxes, re and guards tour reporti
26、ng stations, and guards tour reporting stations for suppressed-signal tour combinations. 1.3 A manual signaling box having a pre-wound signaling mechanism and equipped with a tripping electromagnet to permit automatic actuation by separate detectors, and similar combination devices, shall be evaluat
27、ed with regard to compliance with the applicable requirements for both manual signaling boxes and electrically-actuated transmitters. 1.4 A manual signaling box shall be constructed for use with system-control units, electrically-actuated transmitters, or similar units that will permit its applicati
28、on in compliance with applicable codes and standards of the National Fire Protection Association. 1.5 These requirements do not cover electrically-actuated transmitters. 2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2, a component of a product covered by this standard shall comply with t
29、he requirements for that component. See Appendix A for a list of standards covering components used in the products covered by this standard. 2.1.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the com
30、ponent 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 Specic components are incomplete in construction features or restricted in perfor
31、mance 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. JULY 3, 2008 MANUAL SIGNALING BOXES FOR FIRE ALARM SYSTEMS - UL 38 5UL COPYRIGHTED MATERIAL NOT AUT
32、HORIZED 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 approximate information. 2.3 Undated references 2.3.1 Any undated reference to a code or standard
33、 appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. CONSTRUCTION 3 Enclosures 3.1 General 3.1.1 Electrical parts of a signaling box shall be located or enclosed so as to provide protection against contact with uninsulated
34、live parts. 3.1.2 Operating parts, such as contacts, gear mechanisms, and similar devices, shall be protected against mechanical damage and fouling by dust or other material that may impair their intended operation. 3.1.3 Provision shall be made for mounting a signaling box in position. Bolts, screw
35、s, or other parts used for mounting a signaling box shall be independent of those used for securing component parts of the assembly. 3.1.4 An opening for a winding shaft or similar part shall not be larger than is necessary (with sufficient clearance) for the intended operation of the signaling box.
36、 3.1.5 Except as noted in 3.1.6, a signaling box intended for either ush or surface mounting in a back box shall be provided with a back box that has provision for the connection of metal-clad cable or conduit. A back box without provision for the connection of metal-clad cable or conduit may be use
37、d if: a) Denite instructions are furnished with the box indicating the sections of the unit that are intended to be drilled in the eld for the connection of raceways or b) The unit is intended for mounting on an outlet box. 3.1.6 A signaling box is not required to be furnished with a back box if: a)
38、 Means for attachment to a standard outlet box are provided and b) The spacings required in this standard are provided while the signaling box is mounted in such a back box. See Spacings, Section 10. JULY 3, 2008 MANUAL SIGNALING BOXES FOR FIRE ALARM SYSTEMS - UL 38 6UL COPYRIGHTED MATERIAL NOT AUTH
39、ORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.1.7 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, if a bushing would be required for installation. 3.1.8 The operati
40、ng lever of a signaling box shall be guarded by a door, recess, or by some equivalent arrangement. A door provided to protect a pull lever or similar part shall be held closed by a latch, catch, spring, or similar device. The device used shall not interfere with the operation of the box in accordanc
41、e with the instructions marked upon it. 3.1.9 A signaling box using a part intended to be broken during its operation shall be equipped with a breaking device. A door held closed by a break-glass type of latch and intended to be opened during operation of the signaling box shall have a handle, tab,
42、spring, or similar part to facilitate opening the door after the glass is broken. 3.2 Cast metal enclosures 3.2.1 The thickness of cast metal for an enclosure shall be as indicated in Table 3.1. Exception: Cast metal of lesser thickness may be used if, consideration being given to the shape, size, a
43、nd function of the enclosure, it provides equivalent mechanical strength. See the Impact Test for Enclosures, Section 27. Table 3.1 Cast-metal enclosures Use, or dimensions of area involved a Minimum thickness Die-cast metal, Cast metal of other than the die-cast type, inch (mm) inch (mm) Area of 24
44、 square inches (155 cm 2 ) or less having no dimension greater than 6 inches (152 mm) 1/16 (1.6) 1/8 (3.2) Area greater than 24 square inches or having any dimension greater than 6 inches 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
45、(3.2) a The area limitation for metal 1/16 inch (1.6 mm) in thickness may be obtained by the provision of reinforcing ribs subdividing a larger area. 3.2.2 Die-cast metal for other than ush boxes may be used if it complies with one of the alloy specications given in Specication for Zinc-Alloy Die Ca
46、stings, ASTM B86-88. 3.2.3 If threads for the connection of conduit are tapped all the way through a hole in an enclosure wall, or if an equivalent construction is used, there shall not be less than 3-1/2 nor more than ve threads in the metal, and the constructions shall be such that a standard cond
47、uit bushing can be attached. 3.2.4 If threads for the connection of conduit are tapped only part of the way through a hole in an enclosure wall, there shall not be less than ve full threads in the metal and there shall be a smooth, rounded inlet hole that shall afford protection to the conductors eq
48、uivalent to that provided by a standard conduit bushing. JULY 3, 2008 MANUAL SIGNALING BOXES FOR FIRE ALARM SYSTEMS - UL 38 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.3 Sheet metal enclosures 3.3.1 The thickness of sheet metal used f
49、or the enclosure of a signaling box shall not be less than that indicated in Table 3.2, except that sheet metal of two gauge sizes lesser thickness may be used if the surface under consideration is curved, ribbed, or otherwise reinforced, or if the shape, size, or both shape and size of the surface is such that equivalent mechanical strength is provided. Table 3.2 Sheet-metal electrical enclosures Minimum average thickness of sheet metal Uncoated steel, a Zinc-coated steel, a Aluminum, copper, or brass
