What performance and endurance tests are required for protective signaling systems?

Grounded in the retrieved California Referenced Standards Code — click a citation to read the verbatim passage:

• CRSC § 12-72 High relevance — show source text

  but are to be samples that have been subjected to the complete production soldering process. The test potential is to be obtained from a suitable transformer, the output voltage of which can be regulated. The potential is to be increased gradually from zero, at the rate, of approximate 75 volts per second, until dielectric breakdown occurs. Three different locations on each sample, with different spacings between conductors, if possible, are to be tested. The locations selected are to be the same for all samples. The average dielectric breakdown potentials for each group of six samples for each location is to be determined. The average value for each location for the samples that have been conditioned is to be not less than 80 percent of the average value for the corresponding location for the samples that have not been conditioned.

  RELAYS FOR PROTECTIVE SIGNALING SERVICE

  Sec. 12-72-105.

  (a) Test conditions. Relays which have not been qualified as approved for use with protective signaling systems by investigation and report from an approved listing agency shall have its suitability for use in a protective signaling system evidenced by an investigation and report by an approved testing laboratory which shall include certification that the relay conforms to the minimum requirements of the California Electrical Code. The test report shall include, but is not limited to:

  1. Over- and under-voltage operation per the California Electrical Code.

  2. The insulation of coil windings of relays shall be such as to resist the absorption of moisture.

  3. Temperature readings on the coil and insulation under normal operation at a constant temperature (temperature may be considered constant when three succeeding readings at not less than 5 minute intervals indicate no change in temperature).

  4. Overload test consisting of 50 operations at 115 percent of rated voltage with a test load being that which the relay is to handle.

  5. Endurance test consisting of 40,000 cycles of coded or noncoded signal impulses at rated load and voltage.

  6. Dielectric strength test without breakdown by application of 60 cycle a.c. at twice rated voltage plus 1,000 volts for a period not less than 1 minute.

  (b) Acceptance criteria. There shall be no electrical or mechanical failure, nor any undue pitting, burning or welding of contact during any test.

  SEMICONDUCTOR TESTS

  Sec. 12-72-106.

  (a) General. Semiconductors shall be investigated to determine their suitability for application under all the environmental conditions to which they will be exposed in service.

  The performance tests of the complete device are intended to show the effects of these conditions. The prescribed tests may be supplemented where conditions exceeding those represented by the tests indicated herein may be encountered.

  (b) Test procedure.

  1. Temperature. The system combination is to be connected as in the normal operation test and operated in an oven at 85°C. It is then to be operated in a refrigerator at 0°C. After temperature equilibrium has been maintained in both cases, the unit shall operate as in the normal operation test.
  2. Humidity. The system combination is to be connected as in the normal operation test, and placed in a humidity cabinet maintained at 85 percent humidity, 32°C, for a period of 48 hours. At the end of this time, the unit shall operate as in the normal operation test.
  3. Transient voltage. The system combination shall be subjected to the transient voltages caused by the collapse of the field of a 2-kilovolt-ampere transformer switched on and off on a random basis for 500 cycles.
  4. **Acceptance criteria.
• CRSC § 12-72 High relevance — show source text

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  PROTECTIVE SIGNALING SYSTEMS

  2. Except as specified in Item 1, a bell circuit time-limit-cutout shall operate in not less than 3 minutes nor more than 10 minutes when energized continuously at the maximum rated current value of the circuit to which it is connected, tested at an ambient temperature of 25°C ± 2°C.

  (m) Overload.

  1. Under the conditions specified in Items 2 through 4, a current-interrupting device provided as part of, or intended for use with, a signaling system control unit or equipment shall perform in an acceptable manner during an overload test consisting of not less than 50 make and break operations. There shall be no electrical or mechanical failure of the device, nor shall there be any undue arcing, burning, pitting or welding of contacts.
  2. A control unit or equipment normally supplied from a grounded circuit shall be tested with all normally grounded parts and the enclosure connected through a 15 ampere fuse to the grounded conductor of the supply circuit.
  3. Current-interrupting devices controlling devices on the load side of control equipment power supply terminals shall be tested at 115 percent of rated voltage with a test load equivalent to that which the device is intended to control.
  4. Overcurrent devices in control equipment which includes motor-driven devices or intended to include motors on any of its circuits shall be tested under stalled rotor conditions of the motor.

  (n) Endurance. An operating device included as part of a control unit or combination signaling system shall perform acceptably when tested at the rate and for the number of cycles specified in Table 12-72-1D. When the device controls an electrical load the contacts shall make and break the normal current the device is intended to control for the number of cycles specified. There shall not be any electrical or mechanical failure of the device, nor shall there by any undue arcing, burning, pitting or welding of the contacts. The device shall be tested in conjunction with its related components in the assembly by operating the primary actuating device to produce the signals.

  (o) Dielectric tests.

  1. Except for motors rated at [1] / 2 hp or less, and 250 volts or less, signaling system control units or equipment shall withstand, without breakdown, the application of a 60-cycle alternating potential of twice rated voltage plus 1,000 volts for a period of 1 full minute. The test potential shall be applied to the following parts: A. Between all normally ungrounded current-carrying parts and the enclosure. B. Between all metal current-carrying parts and exposed noncurrent-carrying parts. C. Between all current-carrying metal parts of circuits, including transformer windings, operating at different frequencies of potentials.
  2. Motors rated less than [1] / 2 hp and 250 volts shall withstand for 1 minute without breakdown, the application of a 60-cycle a.c. potential of 900 volts between the frame and winding.

  (p) Abnormal operation.

  1. A control unit shall be capable of operating under abnormal conditions without emission of flame, molten metal or other manifestation of a fire hazard. Excessive temperatures or burnout is indicative of failure.
  2. A control unit connected to a supply circuit of rated voltage shall have its alarm initiating and audible alarm circuits shortcircuited until a constant temperature is attained, or burnout occurs, unless the fault results in operation of an overcurrent device which is an integral component part of the unit.

  (q) **Burnout tests.

• CRSC § 12-72 High relevance — show source text

  5. Endurance test consisting of 40,000 cycles of coded or noncoded signal impulses at rated load and voltage.
  6. Dielectric strength test without breakdown by application of 60 cycle a.c. at twice rated voltage plus 1,000 volts for a period not less than 1 minute.

  (b) Acceptance criteria. There shall be no electrical or mechanical failure, nor any undue pitting, burning or welding of contact during any test.

  SEMICONDUCTOR TESTS

  Sec. 12-72-106.

  (a) General. Semiconductors shall be investigated to determine their suitability for application under all the environmental conditions to which they will be exposed in service.

  The performance tests of the complete device are intended to show the effects of these conditions. The prescribed tests may be supplemented where conditions exceeding those represented by the tests indicated herein may be encountered.

  (b) Test procedure.

  1. Temperature. The system combination is to be connected as in the normal operation test and operated in an oven at 85°C. It is then to be operated in a refrigerator at 0°C. After temperature equilibrium has been maintained in both cases, the unit shall operate as in the normal operation test.
  2. Humidity. The system combination is to be connected as in the normal operation test, and placed in a humidity cabinet maintained at 85 percent humidity, 32°C, for a period of 48 hours. At the end of this time, the unit shall operate as in the normal operation test.
  3. Transient voltage. The system combination shall be subjected to the transient voltages caused by the collapse of the field of a 2-kilovolt-ampere transformer switched on and off on a random basis for 500 cycles.
  4. Acceptance criteria. There shall be no adverse effects on the system combination and the unit shall operate as intended.

  (c) Temperature. A semiconductor shall be operated so as to obtain not more than 75 percent of its rated operating temperature during the normal supervisory condition indicated in Section 12-72-103 (b), Item 5. The rated operating temperature of a semiconductor shall not be exceeded under any condition of operation of the complete unit which produces the maximum temperature dissipation of its components, including the over-voltage test described in Section 12-72-103 (k), Items 1 and 2, and the variable ambient temperature test described in Section 12-72-106 (b), Item 1.

  ELECTRICAL RATING

  Sec. 12-72-107. The electrical rating of a control unit or combination signaling system shall be marked as provided in Section 12-72102 (b). The following ratings shall be marked on the nameplate or may be marked on supplemental labels at the terminal strips:

  (a) Each power supply circuit—the voltage, frequency and maximum input in amperes or watts.

  (b) Each alarm initiating circuit—maximum current output and maximum open-circuit voltage if different than the power supply circuit.

  (c) Each control unit audible alarm or indicating circuit—maximum current output and the maximum open-circuit voltage if different than the power supply circuit.

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  (d) Each combination signaling system sound reproducing control audible alarm circuit-output rating in watts.

  (e) Supplementary—device circuit—maximum current load that may be connected, and the voltage and frequency of supply power other than that of the control unit.

• CRSC § 12-72303 High relevance — show source text

  The applied potential is to be increased gradually from zero until the required test value is reached and is to be held at that value for 1 minute.

  (p) Abnormal operation.

  1. A detector shall be capable of operating continuously under abnormal conditions without resulting in a fire hazard.

  2. To determine if a detector complies with the requirement of Item 1, it is to be operated under the most severe abnormal conditions liable to be encountered in service while connected to a source of supply in accordance with Section 12-72303 (a), Item 5. Emission of flame or molten metal, or any other manifestation of a fire hazard, is considered to be a failure.

  3. In determining if a detector complies with the requirement with respect to circuit-fault conditions, the fault condition is to be maintained continuously until constant temperatures are attained, or until burnout occurs, if the fault does not result in the operation of an overload protective device. Shorting of electrolytic capacitors would represent a typical fault.

  (q) Transient tests.

  1. Two detectors shall be capable of operating in a normal manner after being subjected to 500 externally induced and 500 internally induced transients while energized from a source of supply in accordance with Section 12-72-303 (a), Item 5, and connected to the devices normally used with the unit.
  2. The primary of a 120/240 volt, 60 Hz, 2 kilovolt-amperes (kVA) isolating power transformer, with the secondary open circuited, is to be connected to the same branch circuit as the detector. The input to the transformer is to be de-energized for approximately 1 second by an automatic switching device at a rate of not more than 6 cycles per minute for 500 cycles. During the test the detector is to be operated for normal signaling performance to determine whether transients, generated by the random collapse of the magnetic field of the transformer, resulted in a component failure or other adverse effect.

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  3. The electrical characteristics of the testing transformer are as follows:

  Col1	VOLTAGE	FREQUENCY	INDUCTANCE (L) MILLIHENRIES	QUALITY FACTOR Q	DC RESISTANCE (R) OHMS (23°C)
  Primary winding	120	1,000	21.2	11.50	0.244
  Secondary winding	240	1,000	109.3	4.65	0.371

  4. Two detectors are to be energized in the normal standby condition while connected to a source of supply in accordance with Section 12-72-303 (a), Item 5, which is to be interrupted for approximately 1 second at a rate of not more than 6 cycles per minute for a total of 500 cycles. Following the test the detector is operated for normal signaling performance.
• CRSC § 12-72 High relevance — show source text

  PERFORMANCE

  Sec. 12-72-103.

  (a) General.

  1. The performance of a control unit or combination signaling system shall be investigated by subjecting a representative sample in commercial form to tests described in Sections 12-72-103 (b) through (q). Insofar as possible tests are to be made in the order indicated by the following test headings.

  2. A control unit shall be tested in the position in which it is designed to be installed for proper function.

  3. A combination signaling system console or rack is to be placed in a position simulating an actual installation against a vertical wood wall unless by its design, it is obviously intended for installation in the open. If ventilation openings are provided on the rear surfaces, it is to be spaced out 1 inch (25 mm) from the wall.

  4. Tests shall be made at rated frequency and voltage. The rated voltage for test purposes is considered to be 120 volts for units marked 110–125 volts, or 240 volts if marked 220–250 volts.

  5. Control units intended to be energized by trickle- charged batteries shall be tested at the rated trickle -charge of the battery except for over-and under-voltage tests.

  (b) Normal operation.

  1. A control unit or combination signaling system shall operate reliably and uniformly for all conditions of its intended performance when employed in conjunction with actuating devices, indicating devices and power supplies to form a combination type indicated by the wiring diagram and supplementary information supplied with it.
  2. To determine compliance, actuating devices, indicating devices optional equipment not necessary for transmission of a fire alarm signal, and power supplies are to be connected to the control unit to form a typical combination, and the control unit operated for each condition of its intended performance.
  3. A combination signaling system shall be connected to the intended signal initiating control units and devices, optional equipment or devices not necessary for the transmission of a fire alarm signal, signal indicating devices (in sound-reproducing equipment the output impedance and matching load combination which produced the maximum input in the powerinput test is to be used), and power supplies, and the equipment operated for each condition of its intended performance.
  4. Actuating and indicating devices used for testing are to be those specified by the wiring diagram of the equipment, except that substitute devices may be used if the actuating switching contacts produce equivalent actuation, and if the indicating devices produce equivalent signal indication and circuit loading. Acceptable substitute load devices are those found by investigation to produce the same load conditions as the devices intended to be used with the equipment.
  5. The control unit or combination signaling system shall be in the normal circuit supervisory condition prepared for normal signaling operation by being connected to the devices and circuits indicated in Sections 12-72-103 (b), Items 1 through 3.
  6. The operation of any actuating device shall cause the equipment to operate the related indicating devices to produce a clearly defined signal of the type for which the combination is designed.
  7. A coded fire alarm signal shall consist of not less than three complete rounds of the number transmitted.
  8. Fire alarm signals in schools emitted by devices not distinctive in tone or used for other purposes shall be intermittent or continuous sounding signals. The signal, herein referred to as the California Uniform Fire Code Signal, shall be given for a period of 10 full seconds followed by a silence of 5 full seconds before the signal is repeated. The signal shall be given for a period of not less than 1 minute. Conformance requires signal duration in excess of 1 minute.
• CRSC § 0-150 High relevance — show source text

  In no case is the wire
  to be smaller than No. 14 AWG.
  2. At fixed parts of rigidly clamped special assemblies of live parts and insulating separators (such as contact springs on relays or cam switches) that are wired at the factory, the
  spacings may be less than those indicated, but not less than1/16 inch for 0-150 volts, and not less than3/32 inch for 151-300 volts, through air and over surface, except as noted
  in the following footnotes.
  3. Nor less than 3/64 inch through air and over surface for 250 volts or less if the equipment which the component part controls does not consume more than 375 volt-amperes or
  more than 5 amperes.
  4. Not less than1/32 inch through air and over surface for a circuit involving a potential or not more than 30 volts and supplied by a primary battery or by a standard Class 2 trans-
  former or by a suitable combination of transformer and fixed impedance having output characteristics in compliance with what is required for a Class 2 transformer.
  5. The spacing through air at installation-wiring terminals may be less than1/4 inch but not less than 1/8 inch if the terminals are recessed in insulating material or have insulating
  barriers so as to confine loose strands of conductors sufficiently to make it unlikely that the terminals will be grounded or short-circuited.|

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  TABLE 12-72-1D—ENDURANCE TEST	Col2	Col3
  NORMAL SIGNALING PERFORMANCE OF DEVICE	TOTAL NUMBER OF CYCLES DEVICE TO BE TESTED	CYCLES PER MINUTE
  Continuous noncode signal for each operation of alarm signal initiating device	6,000	6
  A number of coded or noncode impulses for each operation of alarm signal initiating device	40,000	60
  Preliminary coded or noncode signal impulses followed by continuous signal impulses after each operation of alarm signal initiating device	40,000 resetting of device after each group of 40 impulses	— 60
  Relays	40,000	60

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  12-72-2 PROTECTIVE SIGNALING SYSTEMS

  SINGLE- AND MULTIPLE-STATION FIRE ALARM DEVICES MECHANICALLY OPERATED TYPE

  STANDARD 12-72-2

  STATE FIRE MARSHAL

  SCOPE

  Sec. 12-72-200.

  (a) Basic. This standard represents the minimum basic requirements for the construction and performance of single- and multiple-station fire alarm devices intended for indoor installation, and to be listed under this classification. The minimum design, construction and performance standards set forth herein are those deemed as minimum necessary to establish conformance to the regulations of the State Fire Marshal.

• CRSC § 12-72 High relevance — show source text

  2025 CALIFORNIA REFERENCED STANDARDS CODE 107

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  12-72-1 PROTECTIVE SIGNALING SYSTEMS

  STANDARD TEST PROCEDURES

  STANDARD 12-72-1

  STATE FIRE MARSHAL

  SCOPE

  Sec. 12-72-100.

  (a) Basic. This standard represents the minimum basic requirements for the construction and performance of the protective signaling systems to be listed under this classification. The minimum design, construction and performance standards set forth herein are those deemed as minimum necessary to establish conformance to the regulations of the State Fire Marshal as set forth in the California Electrical Code, and when applicable shall be reported on in their entirety by the approved testing laboratory.

  (b) Systems. This standard covers electrically operated devices and control units designed to transmit and sound alarms, supervisory and trouble signals to be employed in ordinary indoor locations in accordance with the Standards of the National Fire Protection Association for the Installation, Maintenance and Use of Proprietary, Auxiliary and Local Protective Signaling Systems, Remote Station, Nos. 72A, 72B, 72C and 72D, and the California Electrical Code. This includes combination protective signaling systems employing nonsupervised sounding circuits; combination fire alarm-communication, -program and -clock systems (hereinafter referred to as combination signaling systems); and audible devices used for both alarm and program or communication

  purposes.

  (c) Control unit. A control unit covered by this standard consists of a unit assembly of electrical parts having provisions for the connection of power-supply circuits routed through the control unit equipment by a prescribed scheme of circuitry; signal initiating circuits extended to separate devices by which the operating parts of the control unit are actuated for signals, and to incorporated or separate devices by which the signals are transmitted or indicated to form a coordinated combination system for definite signaling service.

  TEST REPORTS

  Sec. 12-72-101.

  (a) Test report contents. The report shall include engineering data, and an analysis comparing the design against Section 12-72102 (a) through (u); it shall include wiring, diagrams, operating manuals and photographs as set forth in Section 12-72-102 (a), Items 5 and 6; it shall set forth the tests performed in accordance with Sections 12-72-103 (a) through (g) and the results thereof; and shall verify the correctness of the electrical rating required by Section 12-72-107.

  (b) Listed devices. Electrical wiring, material, devices, combination of devices, fittings, appliances and equipment which have been tested and listed by an approved listing agency for the intended purpose and use need not be individually retested.

  The report shall include the catalog number or other readily identifiable marking, the name of the approved listing agency, the laboratory test report number and date. Such individually tested and listed component parts and devices when installed in combination with other devices in a control unit or in a circuit extended from such control unit shall be subjected to the performance standard tests to determine its suitability for use in combination with other component parts, devices, circuits or equipment.

• CRSC § 12-72 High relevance — show source text

  2. The spaces within devices or assemblies which have been individually or as assemblies tested and listed by a nationally recognized testing agency for the intended use need not comply with the provisions of Table 12-72-1C and Section 12-72102 (t), Items 3 and 4. The report shall note such devices and assemblies by reference to the test report.
  3. If a short circuit between uninsulated live-metal parts of the same polarity would prevent the normal signaling operation of the control unit without simultaneously producing a trouble signal, the spacings between such parts shall be not less than those indicated for “other parts” in Table 12-72-1C except in the case of the special devices mentioned in Footnote 2 to the table, the spacing between uninsulated live-metal parts of the same polarity, for any potential of 0-300 volts, shall be not less than [1] / 32 inch (0.8 mm) through air, and the spacing over surface shall be not less than [1] / 16 inch (1.6 mm) unless the smaller over-surface spacings permitted in Footnotes 3 and 4 of Table 12-72-1C.
  4. Spacings may be reduced provided a barrier or liner of suitable moisture-resistant insulating material of sufficient mechanical strength to withstand operation of equipment and arcing is used, and is reliably held in place.

  (u) Speakers—sound equipment. Speakers shall be of an approved type and designed with current capabilities for the intended function and purposes.

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  PROTECTIVE SIGNALING SYSTEMS

  PERFORMANCE

  Sec. 12-72-103.

  (a) General.

  1. The performance of a control unit or combination signaling system shall be investigated by subjecting a representative sample in commercial form to tests described in Sections 12-72-103 (b) through (q). Insofar as possible tests are to be made in the order indicated by the following test headings.

  2. A control unit shall be tested in the position in which it is designed to be installed for proper function.

  3. A combination signaling system console or rack is to be placed in a position simulating an actual installation against a vertical wood wall unless by its design, it is obviously intended for installation in the open. If ventilation openings are provided on the rear surfaces, it is to be spaced out 1 inch (25 mm) from the wall.

  4. Tests shall be made at rated frequency and voltage. The rated voltage for test purposes is considered to be 120 volts for units marked 110–125 volts, or 240 volts if marked 220–250 volts.

  5. Control units intended to be energized by trickle- charged batteries shall be tested at the rated trickle -charge of the battery except for over-and under-voltage tests.

  (b) Normal operation.

  1. A control unit or combination signaling system shall operate reliably and uniformly for all conditions of its intended performance when employed in conjunction with actuating devices, indicating devices and power supplies to form a combination type indicated by the wiring diagram and supplementary information supplied with it.
  2. To determine compliance, actuating devices, indicating devices optional equipment not necessary for transmission of a fire alarm signal, and power supplies are to be connected to the control unit to form a typical combination, and the control unit operated for each condition of its intended performance.
• CRSC § 12-72 High relevance — show source text

  PROTECTIVE SIGNALING SYSTEMS

  TABLE 12-72-1D—ENDURANCE TEST	Col2	Col3
  NORMAL SIGNALING PERFORMANCE OF DEVICE	TOTAL NUMBER OF CYCLES DEVICE TO BE TESTED	CYCLES PER MINUTE
  Continuous noncode signal for each operation of alarm signal initiating device	6,000	6
  A number of coded or noncode impulses for each operation of alarm signal initiating device	40,000	60
  Preliminary coded or noncode signal impulses followed by continuous signal impulses after each operation of alarm signal initiating device	40,000 resetting of device after each group of 40 impulses	— 60
  Relays	40,000	60

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  12-72-2 PROTECTIVE SIGNALING SYSTEMS

  SINGLE- AND MULTIPLE-STATION FIRE ALARM DEVICES MECHANICALLY OPERATED TYPE

  STANDARD 12-72-2

  STATE FIRE MARSHAL

  SCOPE

  Sec. 12-72-200.

  (a) Basic. This standard represents the minimum basic requirements for the construction and performance of single- and multiple-station fire alarm devices intended for indoor installation, and to be listed under this classification. The minimum design, construction and performance standards set forth herein are those deemed as minimum necessary to establish conformance to the regulations of the State Fire Marshal.

  (b) Definitions. For the purpose of this standard, the following definitions shall apply:

  1. Fire alarm device, multiple station. Two or more gas-operated single station units interconnected by metal tubing to one or more remote alarm-sounding devices.

  2. Fire alarm device, single station. A self-contained fire alarm system comprising a heat detector, an alarm- sounding device and a stored energy source incorporated in one integral package. The basic types are gas- operated units and springwound units.

  3. Gas-operated type. A device having a temperature-sensitive eutectic element; compressed gas, usually in a liquid state in a cylinder; and a sounding means, such as a horn or whistle. When the eutectic element melts, the compressed gas is released in a gaseous state through the alarm-sounding device.

  4. Spring-wound type. A device having a temperature-sensitive bimetal or eutectic element and a spring-wound type mechanism with clapper mounted within a bell housing. The snap action of the bimetal or melting of the eutectic element releases the spring mechanism resulting in a bell-type sound.

  TEST REPORTS

  Sec. 12-72-201.

  (a) Test Report contents. The report shall include engineering data, and an analysis comparing the design against Sections 1272-201(b) through 12-72-202(g); it shall include operating manuals and photographs. The report shall set forth the tests performed in accordance with this standard and the results thereof.

  (b) Instructions and drawings. A copy of the operating and installation instructions and any related drawings is to be furnished with the sample submitted for investigation to be used as a guide in the examination and test of the unit and for this purpose they need not be in final printed form.

• CRSC § 1.5 High relevance — show source text

  2. Smoke density is measured as the drop in light intensity on a microammeter by means of photoelectric cell mounted a few inches below and about 12 inches (305 mm) inside the discharge end of the duct. The light source, stabilized for light intensity, is mounted 1 inch (25 mm) above the duct directly above the photoelectric cell. The microammeter readings are recorded every 5 seconds for the first minute and every 10 seconds for the next 2 minutes.
  3. The differences between these readings and the readings taken before the test are plotted against time (the scale being 40 μA and 40 seconds to the inch) with the resulting area under the curve being measured by use of a planimeter or calculated mathematically. This area is a measure of the smoke density produced during the test.

  (c) Classification. As a result of the tests, air filter units are classified as Class 1 or 2 as indicated below:

  1. Class 1 air filter units are those which, when clean, do not produce flames or sparks when attacked by flame and which develop areas under the smoke density curves that are less than 1.5 square inches (967 mm [2] ).
  2. Class 2 air filter units are those which, when clean, burn moderately when attacked by flame or emit moderate amounts of smoke or both. These units, although they may be consumed to some extent, do not project flames or extensive sparks that would ignite adjacent combustible materials beyond the discharge end of the duct during the test and do not develop areas under the smoke density curves that are more than 6.0 square inches (3871 mm [2] ).

  (d) Adhesive coatings. Liquid-adhesive coatings used on filters shall have a flash point of 325°F (163°C) Cleveland open cup tester, or higher.

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  12-72-1 PROTECTIVE SIGNALING SYSTEMS

  STANDARD TEST PROCEDURES

  STANDARD 12-72-1

  STATE FIRE MARSHAL

  SCOPE

  Sec. 12-72-100.

  (a) Basic. This standard represents the minimum basic requirements for the construction and performance of the protective signaling systems to be listed under this classification. The minimum design, construction and performance standards set forth herein are those deemed as minimum necessary to establish conformance to the regulations of the State Fire Marshal as set forth in the California Electrical Code, and when applicable shall be reported on in their entirety by the approved testing laboratory.

  (b) Systems. This standard covers electrically operated devices and control units designed to transmit and sound alarms, supervisory and trouble signals to be employed in ordinary indoor locations in accordance with the Standards of the National Fire Protection Association for the Installation, Maintenance and Use of Proprietary, Auxiliary and Local Protective Signaling Systems, Remote Station, Nos. 72A, 72B, 72C and 72D, and the California Electrical Code. This includes combination protective signaling systems employing nonsupervised sounding circuits; combination fire alarm-communication, -program and -clock systems (hereinafter referred to as combination signaling systems); and audible devices used for both alarm and program or communication

  purposes.

• California Referenced Standards Code High relevance — show source text

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  PROTECTIVE SIGNALING SYSTEMS

  (b) Temperature test.

  1. There shall be no excessive warping or exposure of high-voltage uninsulated current carrying parts so as to impair operation when representative samples of a plastic material are aged for 7 hours in an air circulating oven maintained at 90°C (194°F).
  2. At least three representative samples shall be placed in the oven. At the end of the 7 hours, the samples shall be removed, permitted to cool and then examined for adverse distortion.

  (c) Flame test. A plastic material employed as part of an appliance for the sole support of current carrying parts or as an enclosure shall not continue to burn for more than 1 minute after the fifth 5-second application of a test flame, with an interval of 5 seconds between applications of the flame. There shall be do dripping of particles, complete consumption of the sample during the test and the material shall not be destroyed in the area of the test flame to such an extent that the integrity of the enclosure is affected. Three samples of the material or three test specimens consisting of a part or section of the polymeric enclosure shall be subjected to this test. Consideration may be given to leaving in place components and other parts which may influence the performance.

  (d) Two of the three test samples shall show acceptable performance. If one sample fails, the test shall be repeated on a new sample with the flame applied under the same conditions as for the failing sample. If the new specimen fails to comply with the requirements, the material is not acceptable. The following test equipment is employed.

  1. Test chamber. The test chamber consists of a sheet- metal cell 2 feet by 1 foot by 1 foot (609 mm by 305 mm by 305 mm), open at the top and on one long side. The chamber shall be located so that an ample supply of air is provided, but the sample is not subjected to drafts. The chamber may be placed in a hood, provided that the fan is turned off during the test and is allowed to run only between tests to remove fumes.
  2. A ring stand with a suitable clamp is used for supporting the specimens.
  3. Burner and mounting block. The test flame is to be obtained by means of a Tirrill burner having a nominal bore of [3] / 8 inch (9 mm). The tube length above the primary air inlets is to be approximately 4 inches (101 mm). The burner is to be adjusted so that, while the burner is in a vertical position, the overall height of the flame is 5 inches (127 mm) and the height of the inner blue cone is 1 [1] / 2 inches (38 mm). A mounting block is to be provided so that the burner may be positioned at an angle of 20 degrees from the vertical.
  4. A stopwatch or clock.
  5. Circulating-air oven.

  (e) Conditioning and mounting. The test samples are to be conditioned by placing them in a circulating-air oven maintained at a uniform temperature not less than 10°C higher than the maximum temperature of the material measured under normal operating conditions but not less than 70°C in any case. The samples are to remain in the oven for 7 days. Prior to test the samples are to be returned to room temperature. The test sample is to be mounted as intended in service in the test chamber.

• CRSC § 12-72 High relevance — show source text

  purposes.

  (c) Control unit. A control unit covered by this standard consists of a unit assembly of electrical parts having provisions for the connection of power-supply circuits routed through the control unit equipment by a prescribed scheme of circuitry; signal initiating circuits extended to separate devices by which the operating parts of the control unit are actuated for signals, and to incorporated or separate devices by which the signals are transmitted or indicated to form a coordinated combination system for definite signaling service.

  TEST REPORTS

  Sec. 12-72-101.

  (a) Test report contents. The report shall include engineering data, and an analysis comparing the design against Section 12-72102 (a) through (u); it shall include wiring, diagrams, operating manuals and photographs as set forth in Section 12-72-102 (a), Items 5 and 6; it shall set forth the tests performed in accordance with Sections 12-72-103 (a) through (g) and the results thereof; and shall verify the correctness of the electrical rating required by Section 12-72-107.

  (b) Listed devices. Electrical wiring, material, devices, combination of devices, fittings, appliances and equipment which have been tested and listed by an approved listing agency for the intended purpose and use need not be individually retested.

  The report shall include the catalog number or other readily identifiable marking, the name of the approved listing agency, the laboratory test report number and date. Such individually tested and listed component parts and devices when installed in combination with other devices in a control unit or in a circuit extended from such control unit shall be subjected to the performance standard tests to determine its suitability for use in combination with other component parts, devices, circuits or equipment.

  (c) Listed control units. Control units which by their design are intended to fully comply with the Standard for the Installation, Maintenance and Use of Proprietary, Auxiliary, Remote Station and Local Protective Association may be investigated and tested in accordance with the Standards for Safety established by Underwriters’ Laboratories, Inc., U.L. 864, provided such investigation, test and report incorporates the provisions of the California Electrical Code.

  (d) Rejection for cause. Compliance with these standards will not necessarily mean approval and listing, if, when examined and tested, it is found to have other features which may impair the result intended by these regulations. Unusual constructions may require application of additional performance tests. The State Fire Marshal may refuse to approve any item for cause.

  (e) Systems only. The standard applies to protective signaling systems as defined in the California Electrical Code, and systems or systems components for which application for approval and listing has been filed under the provisions of the California Electrical Code.

  This standard does not cover manual stations, automatic detectors, automatic transmitters or other actuating devices; nor does it cover separately listed bells, registers or other indicating devices which are not provided as a part of the control unit or matched against the output of sound-reproducing equipment.

  (f) Differing constructions. A control unit having materials or forms of construction differing from this standard may be investigated and tested according to the intent of this standard, and if found to be substantially equivalent may be given recognition for approval and listing. The office of the State Fire Marshal shall be consulted for general requirements and performance standards.

  2025 CALIFORNIA REFERENCED STANDARDS CODE 109

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  PROTECTIVE SIGNALING SYSTEMS

  GENERAL

  Sec. 12-72-102.

  (a) **Investigation—Report.