1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDecember 21, 20171UL 2524Outline of Investigation for In-building 2-Way Emergency RadioCommunication Enhancement SystemsIssue Number: 1Decmeber 21, 2017Summary of TopicsThis First issue of the Ou
2、tline of Investigation for In-building 2-WayEmergency Radio Communication Enhancement Systems, UL 2524,covers products (e.g. repeater, transmitter, receiver, signal boostercomponents, external filters, and battery charging system components)used for in-building 2-way radio emergency radio communicat
3、ionenhancement systems installed in a location to improve wirelesscommunication at that location.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investigation and all copyrigh
4、ts, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of UL.COPYRIGHT 2017 UL LLCUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 21, 2017UL 25242No Text on This PageUL COPYRIG
5、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .62 General 72.1 Components .72.2 Units of measurement .72.3 Undated references .73 Glossary .74 Reserved .10CONSTRUCTION5 General .106 Enclosures 116.1 General 116.2 Enclosure
6、covers 116.3 Battery compartments 127 Internal Materials 128 Accessibility of Uninsulated Live Parts, Film-Coated Wire, and Moving Parts 139 Mechanical Assembly 1510 Protection Against Corrosion .1611 Branch-Circuit Connection .1611.1 General .1611.2 Permanently connected .1612 Other Field-Wiring Co
7、nnections .1812.1 General .1812.2 Field-wiring compartment 1912.3 Power-limited circuits .1912.4 Field-wiring terminals (general application) 2012.5 Field-wiring terminals (qualified application) 2112.6 Field-wiring leads .2213 Internal Wiring 2313.1 General .2313.2 Splices and connections 2413.3 Co
8、nnectors and receptacles .2414 Protective Devices 2415 Current-Carrying Parts 2516 Spacings 2517 Insulating Material 2718 Printed-Wiring Boards .2819 End-of-Line Devices .2820 Voltage-Dropping Resistors 2921 Coil Windings 2922 Components .2922.1 Switches 2922.2 Lampholders and lamps .2922.3 Operatin
9、g mechanisms 3022.4 Across-the-line components .3023 Batteries .3123.1 Rechargeable storage-type used as standby power source 31DECEMBER 21, 2017 UL 2524 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL23.2 Lithium batteries .3124 Grounding f
10、or Products Containing High-Voltage Circuits 3125 Servicing Protection .3525.1 General .3525.2 Trained service personnel .3525.3 Antenna terminal discharge assembly .35PROTECTION AGAINST INJURY TO PERSONS26 General 3627 Sharp Edges .3728 Stability 37PERFORMANCEGENERAL29 Details .3829.1 Tests and vol
11、tages .3829.2 Maximum rated load 39OPERATION TESTS30 General 3931 Operation 4032 Power Supplies .4032.1 General .4032.2 Primary power source .4032.3 Secondary power source(s) 4133 Monitoring for Integrity .4134 Charging Current Test .4334.1 General .4334.2 Discharged battery .4334.3 Charged battery
12、4434.4 Discharged battery - second trial .4435 Electrical Ratings Test 4435.1 General .4435.2 Power input circuits .4435.3 Other external circuits .4536 Jarring Test .4537 Dielectric Voltage-Withstand Test 4638 Leakage Current Test 4739 Component Temperature Test .5140 Abnormal Operation Tests .5440
13、.1 General .5440.2 Operation .5540.3 Field-wiring circuits .5540.4 Electronic components 5540.5 Cooling fans and blowers .5640.6 Transformer burnout 5740.7 Communications circuits 5840.8 Evaluation of reduced spacings on printed-wiring boards 5841 Tests on Special Terminal Assemblies 5941.1 General
14、.5941.2 Mechanical secureness test .59DECEMBER 21, 2017UL 25244UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL41.3 Flexing test 5941.4 Millivolt drop test .5941.5 Temperature test .6042 Strain-Relief Test .6043 Polarity Reversal Test .6044 Po
15、wer-Limited Circuits Test 6044.1 General .6044.2 Maximum voltage 6344.3 Maximum current .6344.4 VAmax(not inherently limited circuits only) .64MANUFACTURING AND PRODUCTION-LINE TESTS45 Dielectric Voltage-Withstand Test .64MARKINGS AND INSTRUCTIONS46 Markings .6546.1 General .6546.2 Permanence of mar
16、king .6947 Installation Wiring Diagram/Instructions 6948 International Languages .72APPENDIX AStandards for ComponentsA1DECEMBER 21, 2017 UL 2524 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover
17、products (e.g. repeater, transmitter, receiver, signal booster components,external filters, and battery charging system components) used for in-building 2-way radio emergencyradio communication enhancement systems installed in a location to improve wireless communication atthat location.1.2 These re
18、quirements cover products to be employed in accordance with the following Model Buildingand Installation Codes:a) Standard for the Installation, Maintenance, and Use of Emergency Services CommunicationsSystems, NFPA 1221;b) National Electrical Code, NFPA 70;c) National Fire Alarm Code, NFPA 72;d) Fi
19、re Code, NFPA 1;e) Life Safety Code, NFPA 101;f) International Fire Code1.3 The products covered by this standard are intended to be used in combination with other productsand devices to form an in-building 2-way radio emergency radio communication enhancement system. Aninstallation document(s) prov
20、ided with the product describes the various products needed to form anin-building 2-way radio emergency radio communication enhancement system and their intended use andinstallation.1.4 These requirements address the safety and operational requirements prior to installation.1.5 These requirements do
21、 not include determination of compliance with regulations of the FederalCommunications Commission (FCC). Should products covered by these requirements be required tocomply with FCC regulations, a report of verification from the manufacturer is required as evidence ofsuch compliance.DECEMBER 21, 2017
22、UL 25246UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2 General2.1 Components2.1.1 Except as indicated in 2.1.2, a component of a product covered by this standard shall comply withthe requirements for that component. See Appendix A for a lis
23、t of standards covering components usedin the products covered by this standard.2.1.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this standard, orb) Is supers
24、eded by a requirement in this standard.2.1.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.1.4 Specific components are incomplete in construction features or restricted in performancecapabilities. Such components are intended for use only und
25、er limited conditions, such as certaintemperatures not exceeding specified limits, and shall be used only under those specific conditions.2.2 Units of measurement2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.2.3 Undated r
26、eferences2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shallbe interpreted as referring to the latest edition of that code or standard.3 Glossary3.1 ACKNOWLEDGE - Action taken to confirm that a message or signal has been received, such aspressing a
27、button.3.2 ACTIVE RADIO FREQUENCY EMITTING DEVICE - A powered device that emits a radio frequencysignal as part of an in-building 2-way radio emergency radio communication enhancement system.3.3 ADVERSE CONDITION - Any condition occurring in a circuit or communication path that interfereswith the pr
28、oper signaling or interpretation of status-change signals or both. Conditions include radiofrequency interference.3.4 AIR-HANDLING SPACE - Space used for environmental air-handling purposes other than ducts orplenums. The space over a hung ceiling used for environmental air-handling is an example.DE
29、CEMBER 21, 2017 UL 2524 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3.5 ANNUNCIATOR - A unit containing one or more indicator lamps, alphanumeric displays, or otherequivalent means in which each indication provides status information abou
30、t a circuit, condition, orlocation.3.6 AVERAGE VALUE - The sum of all instantaneous values of current (or voltage), averaged overone-half of an alternating cycle.3.7 BATTERY CHARGER - A product intended to deliver sufficient current to maintain storage batteriesin their fully-charged condition while
31、 the batteries are not connected to a load. The storage batteries areintended to provide a secondary source of operating power in response to failure of the primary source ofoperating power.3.8 CIRCUIT CLASSIFICATIONS:a) High-Voltage Circuit - A circuit involving a potential of not more than 600 V n
32、ominal andhaving characteristics in excess of those of a low-voltage circuit.b) Low-Voltage Circuit - A circuit involving a potential of not more than 30 V alternating current(AC) rms, 42.4 V direct current (DC) or peak.c) Power-Limited Circuit - A circuit wherein the power is limited as specified i
33、n Tables 44.1 and44.2.3.9 DISCHARGED BATTERY - A standby battery discharged as described in 34.2.3.10 DISTINCTIVE SIGNALS - Signals obtained from different sounding appliances (such as bells, horns,sirens, and buzzers) or from a single appliance (such as an electronic horn) where a continuous signal
34、 isobtained under one condition and a pulsing signal under another.3.11 DONOR ANTENNA - Antennas used with in-building two-way emergency enhancement radiosystems that provide the connection between the wide area communications system of interest and thein-building system.3.12 END-OF-LINE DEVICE - A
35、device installed at the end of a circuit for the purpose of monitoring thecircuit for fault conditions.3.13 EXTERNAL CIRCUITS - Circuits or wiring leaving the product.3.14 FAULT - An open, ground, or short-circuit condition on any line extending from a product.3.15 FIELD WIRING - Conductors to be in
36、stalled by others to connect a product to source(s) of supply,devices, other products, and loads.3.16 FIRE COMMAND CENTER - The principal attended or unattended location where the status of thedetection, alarm communications, and control systems is displayed and from which the system can bemanually
37、controlled.DECEMBER 21, 2017UL 25248UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3.17 FIXED EQUIPMENT - Any equipment product that is intended to be permanently connectedelectrically to the wiring system.3.18 GROUNDED CONDUCTOR - A conducto
38、r employed to connect the intentionally grounded circuit ofa wiring system to a grounding electrode.3.19 GROUND FAULT - A circuit impedance to ground sufficient to result in the annunciation of a troublecondition.3.20 GROUNDING CONDUCTOR - A conductor employed to connect non-current-carrying parts o
39、fequipment, raceways, and enclosure to a grounding electrode at the service which is, in turn, connectedto earth ground or to some conducting body which serves in place of earth ground.3.21 OPEN FAULT - A circuit impedance increase sufficient to prevent normal operation.3.22 OPERATOR - Individual(s)
40、 responsible to access and operate the product and/or system, but doesnot have access to portions of the product required for servicing and maintenance.3.23 OPERATOR INTERFACE - Providing controls for manually operating the product/system.3.24 PATH (PATHWAY) - Any conductor, optic fiber, radio carri
41、er, or other means for transmittinginformation between two or more units and/or locations.3.25 POWER SUPPLY - A source of electrical operating power including the circuits and terminationsconnecting it to the dependent product/system components.3.26 POWER SUPPLY-BATTERY CHARGER - A power supply that
42、 serves the dual function of providingoperating power and charging storage batteries. The power supply is usually permanently connected tostorage batteries, and the power supply-battery combination is intended to provide all of the electricaloperating power required by the equipment to which the com
43、bination is connected, when the equipmentis operating in its intended manner.3.27 REPEATER - A device for receiving and re-transmitting two-way communication signals.3.28 RESET - A control function that attempts to return a system or device to its normal non-alarm state.3.29 RISK OF ELECTRIC SHOCK -
44、 A risk of electric shock is determined to exist at any part if:a) The potential between the part and earth ground or any other accessible part is more than42.4 V peak, andb) The continuous current flow through a 1500 W resistor connected across the potentialexceeds 0.5 mA.3.30 RISK OF FIRE - A risk
45、 of fire is considered to exist at any two points in a circuit where:a) The open circuit voltage is more than 42.4 V peak and the energy available to the circuitunder any condition of load including short circuit, results in a current of8Aormore after 1 minof operation; orb) A power of more than 15
46、W can be delivered into an external resistor connected betweenthe two points.DECEMBER 21, 2017 UL 2524 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3.31 STANDBY POWER SOURCE - Provides power when the primary power source fails.3.32 STORAGE
47、 BATTERY - Any battery which, by design or construction, is intended to be recharged.3.33 SUPERVISORY SIGNAL - A signal indicating the need of action in connection with the supervisionof watchmen, sprinkler and other extinguishing systems or equipment, or with the maintenance featuresof other protec
48、tive systems.3.34 SUPPLEMENTARY - Refers to equipment or operations not required by this standard.3.35 SUPPLEMENTARY DEVICE - A device intended to be connected to a supplementary device circuit.3.36 SUPPLEMENTARY-DEVICE CIRCUIT - A circuit provided by a product for controlling a device, theoperation
49、 of which is supplementary to the primary initiating and indicating devices of the control unit.3.37 TROUBLE SIGNAL - A visual or audible signal indicating a fault condition of any nature, such as acircuit break or ground or other trouble condition occurring in the device or wiring associated with aprotective signaling system.3.38 USER - An individual who operates or services the product.3.39 WIRE-TO-WIRE FAULT - A wire-to-wire (short circuit) fault is determined to be a resistance of 0.1W or less across the circuit.4 ReservedCONSTRUCTION5 General5.1 A product shall use materials
