CRSC · California Referenced Standards Code

Which CRSC chapters cover protective signaling system standards and tests?

If you are testing or listing a fire alarm control unit, a mechanically‑operated alarm device, or a combustion‑products smoke detector in California, start with Chapter 12‑72‑1 for the required test procedures and reports, then follow Chapter 12‑72‑2 (mechanical devices) or Chapter 12‑72‑3 (smoke detectors) for device‑specific endurance, dielectric and sensitivity tests; the chapters specify exact cycle counts, voltages, sample sizes and marking rules. file

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Last reviewed: July 6, 2026

What the code requires — 2-4 sentences

The California Referenced Standards Code requires that manufacturers and testing laboratories follow the standard test procedures in § 12-72-100 through § 12-72-107 (Chapter 12-72-1) for electrically operated protective signaling systems and control units; specific device categories are covered by Chapter 12-72-2 (single- and multiple‑station mechanically operated fire alarm devices, § 12-72-200 et seq.) and Chapter 12-72-3 (combustion‑products smoke detectors, § 12-72-300 et seq.). The three chapters define scope, required test reports, performance tests (endurance, dielectric, overload, abnormal‑operation, etc.), and marking/labeling requirements that must be met for listing by the State Fire Marshal. See the Chapter 12-72-1 scope and test report requirements in § 12-72-100 and § 12-72-101 .

All protective signaling systems and their components intended for listing must be tested to the minimum procedures in Chapter 12‑72‑1 and to the device‑specific standards in Chapter 12‑72‑2 (mechanical fire alarm devices) or Chapter 12‑72‑3 (combustion‑products smoke detectors).

Requirements in detail

1) Chapter 12‑72‑1 — Standard test procedures (control units & systems)

  • Scope: covers electrically operated control units and systems, including combination systems and audible/program devices — § 12-72-100.
  • Test reports: laboratory reports must include engineering data, wiring diagrams, operating manuals, photographs and an analysis against the listed performance paragraphs — § 12-72-101.
  • Performance tests: control units are tested under headings in § 12-72-103 (normal operation, overload, endurance, dielectric, abnormal operation, burnout, etc.). The endurance requirement references Table 12‑72‑1D.
  • Printed wiring boards, semiconductors, electrical rating/nameplate requirements and acceptance criteria are covered in § 12-72-104, § 12-72-106, and § 12-72-107.

2) Chapter 12‑72‑2 — Mechanically‑operated single & multiple station devices

  • Scope & definitions: the chapter defines single‑station and multiple‑station mechanically operated fire alarm devices (gas‑operated and spring‑wound) — § 12-72-200.
  • Test reports: device‑level test report content and instructions are specified in § 12-72-201.
  • Temperature classifications, oven/time‑temperature curve and fire‑test layouts, plus device endurance and other mechanical test methods, appear in the chapter text and tables (see Table 12‑72‑2A/B, Figures).

3) Chapter 12‑72‑3 — Smoke detectors (combustion‑products type)

  • Scope: construction and performance minimums for ionization, resistance‑bridge and related combustion‑product detectors — § 12-72-300.
  • Test sample counts, voltages and required tests (sensitivity, electrical supervision, endurance, dielectric, transient, abnormal operation) are in § 12-72-303 and surrounding paragraphs; sample size and test voltages are explicitly specified.
  • Component reliability, derating and failure‑rate guidance are required as part of the detector data package; see the component reliability paragraphs and Table references in Chapter 12‑72‑3.

Quick reference table — decision‑relevant test thresholds and values

Decision factor Required value / threshold Code Reference
Endurance — continuous noncode signal (device) 6,000 cycles at 6 cycles/min Table 12‑72‑1D; § 12-72-103 (n) file
Endurance — coded/noncode impulses (device) 40,000 cycles at 60 cycles/min Table 12‑72‑1D; § 12-72-103 (n) file
Detector endurance (combustion products) 6,000 cycles at ≤ 10 cycles/min § 12-72-303 (n)
Dielectric test (control units) 2× rated voltage + 1,000 V for 1 minute § 12-72-103 (o)
Semiconductor temperature test Operate at 85°C and 0°C equilibrium, operate during normal tests § 12-72-106 (b)(1)
Detector sample size for tests Minimum 20 assembled detectors (+ extras for radioactive types) § 12-72-303 (a)
Electrical rating markings (nameplate) Must mark supply voltage/frequency/current, initiating circuit output, audible circuit output, etc. § 12-72-107
Temperature classification (device rating) Ordinary / Intermediate limits given in Table 12‑72‑2B Table 12‑72‑2B; § 12-72-2

(Each table row above is grounded in the chapter text and tables cited; consult the full section for test setup, loads, ambient conditions and acceptance criteria.) file

Exceptions & special cases

  • Individually listed components (e.g., listed transformers, listed bells) do not require full retesting if their listing and lab report are provided — see § 12-72-101 (b); however, listed components used in combination must still be subjected to combination performance tests to ensure compatibility.
  • Alternative constructions that differ from the standard may be tested under the intent of the standard and may be accepted as substantially equivalent; consult the State Fire Marshal office when deviating — § 12-72-103 (d).
  • Some spacing and insulation requirements may be reduced if barriers/liners of approved insulating material are used — see the spacing rules and permitted reductions in the control‑unit requirements.

Common mistakes

  • Assuming listing for one configuration means all combinations are approved. Chapter 12‑72 requires that components listed alone be tested in their intended combination (performance tests) — § 12-72-101 (b).
  • Misreading the endurance cycle rates: the code specifies both total cycles and cycles per minute (e.g., 40,000 cycles at 60/min) — ensure test equipment runs to both the count and rate in Table 12‑72‑1D and § 12-72-103 (n). file
  • Failing to mark electrical ratings on the nameplate as required by § 12-72-107; missing nameplate rating information can invalidate a test report.
  • Omitting ambient and conditioning details (temperature, humidity, fan velocity, sample preconditioning) specified for detector tests in § 12-72-303 — these affect sensitivity and pass/fail.

Worked example — endurance test timing and setup

Scenario: You must perform the coded‑impulse endurance test for an audible device that the standard classifies under the control‑unit tests.

  • Code requirement: 40,000 cycles of coded or noncode impulses at 60 cycles per minute (Table 12‑72‑1D; § 12-72-103 (n)). file
  • Test runtime calculation: 40,000 cycles ÷ 60 cycles/min = 666.67 minutes, i.e., 11.11 hours continuous operation at rated load and voltage. Ensure proper load is connected and contacts make/break normal current per the device intent.
  • Acceptance: No electrical/mechanical failure and no undue pitting, burning or welding of contacts during or after the test — see acceptance criteria in § 12-72-103 (b) and Table 12‑72‑1D.

Another example (detector): For a combustion‑products detector endurance: 6,000 cycles at up to 10 cycles/min → 600 minutes = 10 hours of operation; tests must be done with related output loads and at the test voltage specified in § 12-72-303 (a)(5). file

Related provisions

  • § 12-72-100 — Scope (Chapter 12‑72‑1) — system coverage and relationship to the California Electrical Code.
  • § 12-72-101 — Test report contents (Chapter 12‑72‑1).
  • § 12-72-103 — Performance tests for control units (including endurance, dielectric, overload, abnormal operation).
  • § 12-72-104 — Printed wiring board requirements (Chapter 12‑72‑1).
  • § 12-72-106 — Semiconductor tests (Chapter 12‑72‑1).
  • § 12-72-107 — Electrical rating / nameplate marking requirements (Chapter 12‑72‑1).
  • § 12-72-200 — Scope / definitions for mechanically operated devices (Chapter 12‑72‑2).
  • § 12-72-201 — Test reports for mechanically operated devices (Chapter 12‑72‑2).
  • § 12-72-300 — Scope / definitions for combustion‑products smoke detectors (Chapter 12‑72‑3).
  • § 12-72-303 — Detailed detector tests (sensitivity, endurance, dielectric, transients) (Chapter 12‑72‑3).

Code references

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

  • CRSC § 12-10 High relevance — show source text

    CHAPTER 12-10-1 EXITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

    CHAPTER 12-10-2 EXITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

    CHAPTER 12-10-3 EXITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

    CHAPTERS 12-11A AND 12-11B

    BUILDING AND FACILITY ACCESS

    SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 85

    CHAPTER 12-12 RESERVED . . . . . . . . . . . . . . . . . . . . . . . . . 87

    CHAPTER 12-13 STANDARDS FOR INSULATING

    MATERIAL. . . . . . . . . . . . . . . . . . . . . . . . . . 89

    CHAPTER 12-16-1 ENGINEERING REGULATIONS—QUALITY

    AND DESIGN OF THE MATERIALS OF

    CONSTRUCTION . . . . . . . . . . . . . . . . . . . 101

    CHAPTER 12-16-2 ENGINEERING REGULATIONS—QUALITY

    AND DESIGN OF THE MATERIALS OF

    CONSTRUCTION . . . . . . . . . . . . . . . . . . . 103

    CHAPTER 12-31C RADIATION SHIELDING STANDARDS . . 105

    CHAPTER 12-71 AIR FILTERS. . . . . . . . . . . . . . . . . . . . . . . 107

    CHAPTER 12-72-1 PROTECTIVE SIGNALING SYSTEMS . . . 109

    CHAPTER 12-72-2 PROTECTIVE SIGNALING SYSTEMS . . . 123

    CHAPTER 12-72-3 PROTECTIVE SIGNALING SYSTEMS . . . 133

    HISTORY NOTE APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

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    PART 12 CROSS REFERENCE TABLE

    (Cross reference table is nonregulatory, intended only as an aid to the code user.)

  • 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 § 1009.12 High relevance — show source text

    Emergency exit and panic hardware.
    |SFM|Part 9, Section 1009.12| |Chapter 12-11A,
    12-11B|Detectable warning products and directional
    surfaces|DSA|Part 2, Sections 1112A.9, 1116A.5, 11B-247,
    11B-406.5.12, 11B-705, 11B-810.5.2| |Chapter 12-12|Reserved||| |Chapter 12-13|Standards for insulating material|CA/SFM|Part 2.5, Section R302.10.1
    Part 6, Section 110.8
    Part 9, Section 720, Table 721.1(1)
    Part 11, Section A5.504.4.8| |Chapter 12-16-1|California standard for earthquake-actuated
    automatic gas shutoff systems|DSA|Part 2, Chapters 16 and 16A
    Part 5, Section 1211.8| |Chapter 12-16-2|California standard for residential excess flow
    actuated automatic gas shutoff valves|DSA|Part 5, Section 1209.1| |Chapter 12-31C|Radiation shielding|DPH|Part 2, Section 3102C| |Chapter 12-71|Air filters|SFM|Part 4, Sections 401.2, 509.2.3, 509.2.3.4
    Part 6, Section 120.1| |Chapter 12-72-1|Protective signaling systems.
    Standard test procedures.|SFM|| |Chapter 12-72-2|Protective signaling systems. Single-and
    multiple-station fire alarm devices
    mechanically operated type.|SFM|| |Chapter 12-72-3|Protective signaling systems. Smoke detectors,
    combustion products type.|SFM||

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    12-1 ADMINISTRATION

    RESERVED

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    12-3 RELEASING SYSTEMS FOR SECURITY BARS IN DWELLINGS

    (This standard includes provisions of Underwriters Laboratories Subject 2326, Appendix B, dated December 17, 1999, reprinted with their permission.)

    INTRODUCTION

    SECTION 12-3-1—SCOPE

    12-3-1.1 These requirements cover releasing systems for bars, grilles, mesh, glazing or other items intended to provide security at doors and windows required for emergency escape from dwelling units. When actuated by the occupant, the system allows the obstructions over the door or window to be moved so occupants can escape in the event of an emergency.

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

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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

    1. The testing circuit shall be protected by overcurrent devices having a rating of at least ten times the primary current rating of the transformer. Output terminals of the transformer shall be short-circuited, if such a condition results in less than three times the maximum normal load current being drawn from the secondary. Tests shall be continued until constant temperatures are attained or a burnout occurs. Blowing of the fuse on the primary side of the transformer is not considered to be a failure.

    2. If the circuit designs of a control unit or combination signaling system incorporate a time limit cutout or a mercury tube switch wired into the system circuit in such a manner that a short circuit or a ground fault causes the device to carry current in excess of its maximum normal load, it shall withstand the test specified in Items 5 through 7, without introducing a fire hazard.

    3. The device is to be tested in the control equipment as it is intended to be normally used and in series with a protective fuse of the marked maximum rating indicated by the markings on the control unit. All openings in the enclosure of the control equipment shall be covered with surgical cotton, and the enclosure is to be connected to ground through a fuse of the same rating as the protective fuse mentioned above.

    4. The open circuit voltage of the test circuit is to be within 5 percent of the rated voltage; see Sections 12-72-103 (a), Item 4, and 12-72-103 (c), Item 1, of the control equipment circuit in which the device is installed, except that a higher voltage may be used if agreeable to those concerned. The source of current and the test circuit should have sufficient capacity to deliver 1,000 amperes when the system is short-circuited at the testing terminals.

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    PROTECTIVE SIGNALING SYSTEMS

    1. Ignition of the cotton, or of insulation on circuit conductors, emission of flame or molten metal from the enclosure, blowing of the fuse in the grounding conductor, damage to other parts of the control equipment, or any evidence of a fire hazard is to be deemed as failure. Burnout of pigtail leads or a thermal element, or welding of contacts, is not to be considered as a failure.

    PRINTED WIRING BOARDS

    Sec. 12-72-104.

    (a) General.

    1. These requirements cover printed wiring boards that are intended for use in fire protective signaling equipment. The acceptability of the combination of the printed wiring board and the electric equipment is to be determined by the State Fire Marshal.

    2. Printed wiring boards conforming to ASTM Grade FR-5 when tested in accordance with ASTM Designation D-1867, may be used in protective signaling equipment.

    3. Throughout these requirements, the term “printed wiring” is used to designate a pattern of conductive material formed in a predetermined design on the surface or surfaces of a common insulating base, and intended primarily to provide point to point electrical connections, shielding or to form inductors. The term “printed wiring board” is used to designate the combination of a printed writing pattern and the common insulating base completely processed as far as the printed portion is concerned. The term “printed wiring assembly” is used to designate a printed wiring board on which separate components have been added.

  • CRSC § 12-72 High relevance — show source text
    1. 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.
    2. 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.
    3. 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

    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.

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    PROTECTIVE SIGNALING SYSTEMS

    GENERAL

    Sec. 12-72-102.

    (a) **Investigation—Report.

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

    |SFM|| |Chapter 12-72-2|Protective signaling systems. Single-and
    multiple-station fire alarm devices
    mechanically operated type.|SFM|| |Chapter 12-72-3|Protective signaling systems. Smoke detectors,
    combustion products type.|SFM||

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    12-1 ADMINISTRATION

    RESERVED

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    12-3 RELEASING SYSTEMS FOR SECURITY BARS IN DWELLINGS

    (This standard includes provisions of Underwriters Laboratories Subject 2326, Appendix B, dated December 17, 1999, reprinted with their permission.)

    INTRODUCTION

    SECTION 12-3-1—SCOPE

    12-3-1.1 These requirements cover releasing systems for bars, grilles, mesh, glazing or other items intended to provide security at doors and windows required for emergency escape from dwelling units. When actuated by the occupant, the system allows the obstructions over the door or window to be moved so occupants can escape in the event of an emergency.

    12-3-1.2 These requirements only cover the ability of the releasing system to be manually activated from the interior of a dwelling unit by an occupant to affect an escape through the protected opening.

    12-3-1.3 These requirements cover releasing systems intended for use on the interior side of doors or windows in all climatic locations.

    12-3-1.4 These requirements do not evaluate the ability of the releasing system or obstructions to resist an external forced entry attack.

    12-3-1.5 These requirements do not evaluate the ability of the releasing system or obstructions to be opened or removed from the exterior of the residential dwelling unit by emergency response personnel during rescue operations.

    12-3-1.6 Products covered by these requirements are intended for installation in dwelling units to protect door and window openings that are designated by the California Building Standards Code to be used as the secondary means of escape from the living area.

    12-3-1.7 Products covered by these requirements are not intended to be used to protect doors in means of egress path for nonresidential occupancies, the common egress path of multifamily residential dwelling units or the primary means of egress path in a single-family dwelling unit.

    12-3-1.8 These requirements do not cover window guards or fall prevention devices that are intended to prevent falls from upper story windows.

    12-3-1.9 These requirements do not apply to storm doors and windows or light duty screens used for insect control.

  • CRSC § 12-16 High relevance — show source text

    CHAPTER 12-16-1 ENGINEERING REGULATIONS—QUALITY

    AND DESIGN OF THE MATERIALS OF

    CONSTRUCTION . . . . . . . . . . . . . . . . . . . 101

    CHAPTER 12-16-2 ENGINEERING REGULATIONS—QUALITY

    AND DESIGN OF THE MATERIALS OF

    CONSTRUCTION . . . . . . . . . . . . . . . . . . . 103

    CHAPTER 12-31C RADIATION SHIELDING STANDARDS . . 105

    CHAPTER 12-71 AIR FILTERS. . . . . . . . . . . . . . . . . . . . . . . 107

    CHAPTER 12-72-1 PROTECTIVE SIGNALING SYSTEMS . . . 109

    CHAPTER 12-72-2 PROTECTIVE SIGNALING SYSTEMS . . . 123

    CHAPTER 12-72-3 PROTECTIVE SIGNALING SYSTEMS . . . 133

    HISTORY NOTE APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

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    PART 12 CROSS REFERENCE TABLE

    (Cross reference table is nonregulatory, intended only as an aid to the code user.)

    PART 12
    STANDARD    		 SUBJECT ADOPTING
    AGENCY    		 ASSOCIATED TITLE 24
    BUILDING STANDARD
    Chapter 12-3 Releasing systems for security bars in
    dwellings    		 SFM Part 2, Sections 1031.2.1, 1031.6, 1032.7
    Part 2.5, Sections R319.1.1 and R319.4.4
    Part 9, Sections 1031.2.1, 1031.6, 1032.7
    Appendix 4 Section 452.1.5 and Title 19 provisions 4.1, 4.2, 4.3,
    4.4, 4.5, 4.6 reprinted in Part 9
    Part 10, Section 505.4
    Chapter 12-4A Laboratory animal quarters standards DPH Part 2, Section 1236
    Chapter 12-4-1 Stage and Platforms SFM Part 2, Sections 410.2.7, 410.2.7.1, 410.2.7.2
    Part 9, Sections 105.6.51, 4809
    Chapter 12-7-1 Fire-resistive standards.
  • CRSC § 1.5 High relevance — show source text
    1. 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.
    2. 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.

  • CRSC § 12-72 High relevance — show source text
    1. Endurance test consisting of 40,000 cycles of coded or noncoded signal impulses at rated load and voltage.
    2. 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 § 105.6 High relevance — show source text

    INDEX

    Unlimited Area Buildings 507 Unsafe Structures and Equipment (see Structures, Unsafe) 116 Appeals 113, Appendix B Revocation of permit 105.6 Stop work orders 115 Utilities disconnection 112.3

    Unstable Materials 307.3, Table 414.2.5.1, Table 414.5.1, Table 415.6.5, 415.7.1, 415.9 Unusable Space 711.2.6 Use and Occupancy Chapter 3 Accessory 508.2 Classification 302.1

    Detailed requirements based on occupancy and use Chapter 4 Incidental uses 509, Table 509.1 Mixed 508.3, 508.4 Use designation 302.2 Utilities 112

    Service connection 112.1

    Service disconnection 112.3

    Temporary connection 112.2 Utility and Miscellaneous Occupancy (Group U) 312 Accessibility Chapters 11A and 11B Agricultural buildings Appendix C Area 503, 505, 506, 507, 508 Flood provisions Appendix G Height 503, 504, 508 Incidental uses 509

    Live loads Table 1607.1 Means of egress Exit signs 1013.1 Stairway, exit access 1019 Mixed occupancies 508.3, 508.4 Special provisions Private garages and carports 406.3 Residential aircraft hangars 412.4 Sprinkler protection 903.2.11 Travel distance 1006.2.1, 1006.3,

    1017.1 UV Germicidal Irradiation Systems

    1211

    Valuation or Value (see Fees, Permit) 109.3 Vapor Diffusion Port 202 Vapor Retarders 1202.3, 1404.3, 1404.3.2 Vegetative Artificial decorative 419, 419.1 Vegetative roofs 1505.10, 1507.15 Vehicle Barrier 1607.11 Vehicle Barrier Systems 406.4.2, 1607.11 Vehicle Show Rooms 304 Vehicular Fueling 406.7 Vehicular Gates 3110 Vehicular Repair 406.8

    Veneer Cement plaster 1404.16, 1411 Fastening 1404.5 Fiber-cement siding 1404.17, 1411 Glazing 1404.13, 1411 Masonry, adhered 1404.11, 2101.2.1, 2103.2.4 Masonry, anchored 1404.7, 1411, 2101.2.1

    Metal 1404.12

    Plastic 1411, 2605 Slab-type 1404.9, 1411

    Testing Automatic fire-extinguishing systems 904.4

    Automatic water mist systems 904.11.3 Building official required 104.2.3.6 Carbon dioxide systems 904.8 Clean agent system 904.10 Dry chemical systems 904.6 Emergency and standby power 2702.4 Fire alarm systems 907.7, 907.8 Fire pumps 913.5 Fire-resistant materials 703.2

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

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    1. 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 § 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
    1. Two detectors are to be maintained at each ambient temperature for a sufficient length of time to ensure that thermal equilibrium has been reached. The units are then to be tested for sensitivity while connected to a source of supply in accordance with Section 12-72-303 (a), Item 5.
    2. Sensitivity measurements shall be recorded before and during exposure to each ambient temperature in accordance with the sensitivity test.
    3. Each unit shall operate normally in each ambient. The sensitivity readings measured with the units in each ambient temperature shall be within 50 percent of the value recorded in the normal ambient condition.

    (m) Overload.

    1. A detector shall be capable of operating in a normal manner after being subjected to 50 cycles of alarm signal operation at a rate of not more than 6 cycles per minute with the supply circuit to the detector at 115 percent of rated nameplate voltage. Each cycle shall consist of starting with the detector energized in the normal standby condition, initiation of an alarm by smoke or electrical means, and restoration of the detector to normal standby condition.
    2. Rated test loads are to be connected to those output circuits of the detector which are energized from the detector power supply, such as remote indicators, relays, etc. The test loads shall be those devices, or the equivalent, normally intended for connection. If an equivalent load is employed for a device consisting of an inductive load, a power factor of 60 percent is to

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    be employed. The rated loads are established initially with the detector connected to a source of supply in accordance with Section 12-72-303 (a), Item 5, following which the voltage is increased to 115 percent of rating. 3. For direct current signaling circuits an equivalent inductive test load is to have the required direct current resistance for the test current and the inductance (calibrated) to obtain a power factor of 60 percent when connected to a 60 Hertz (Hz) alternating current potential equal to the rated direct current test voltage. When the inductive load has both the required direct current resistance and the required inductance, the current measured with the load connected to an alternating current circuit will be equal to 0.6 times the current measured with the load connected to a direct current circuit when the voltage of each circuit is the same.

    1. Separately energized circuits of a detector such as dry contacts shall be capable of operating in a normal manner after being subjected for 50 cycles of signal operation at a rate of not more than 6 cycles per minute while connected to a source of supply in accordance with Section 12-72-303 (a), Item 5, with 150 percent rated loads at 60 percent power factor applied to output circuits which do not receive energy from the detector. There shall be no electrical or mechanical failure of the switching circuit.
    2. The test loads shall be set at 150 percent of rated current while connected to a separate power source of supply in accordance with Section 12-72-303 (a), Item 5.

    (n) Endurance.

    1. A detector shall be capable of operating in a normal manner after being subjected to 6,000 cycles of alarm signal operation at a rate of not more than 10 cycles per minute with the detector connected to a source of supply in accordance with Section 12-72-303 (a), Item 5, and with related devices or equivalent loads connected to the output circuits.
  • CRSC § 12-72 High relevance — show source text
    TABLE 12-72-2B—TEMPERATURE CLASSIFICATIONS Col2 Col3 Col4
    TEMPERATURE
    ** CLASSIFICATION**    		 OPERATING TEMPERATURE LIMITS OPERATION OPERATION
    TEMPERATURE
    ** CLASSIFICATION**    		 Minimum °F (°C) Maximum °F (°C) Tolerance, °F (°C)
    Ordinary 128 (53.3) 165 (73.9) 10 (5.6)
    Intermediate 166 (74.4) 225 (107) 15 (8.3)

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    FIGURE 12-72-2-1—TIME-TEMPERATURE CURVE—15-FOOT SPACINGS

    FIGURE 12-72-2-2—FIRE-TEST LAYOUT

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    FIGURE 12-72-2-3—TEST OVEN

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    12-72-3 PROTECTIVE SIGNALING SYSTEMS

    SMOKE DETECTORS, COMBUSTION PRODUCTS TYPE

    STANDARD 12-72-3

    STATE FIRE MARSHAL

    SCOPE

    Sec. 12-72-300.

    (a) Basic. This standard represents the minimum basic requirements for the construction and performance of combustion products detectors of other than the photoelectric type to be employed in ordinary indoor locations 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. Alarm signal. A signal intended to indicate an emergency fire condition.

    2. Annunciator. Integrally mounted or remotely connected visual indicating device intended to indicate an alarm or trouble condition.

    3. Ionization type detector. A device in which the presence of small combustion practices, often invisible to the eye, interfere with the normal ionization current resulting from radiation produced by a radioactive source in the detection chamber. A second chamber, employing a similar ionization source, may also be used to compensate for normal environmental ambient changes.

    4. Ionization-resistance bridge type detector. Employs both ionization and resistance bridge principles in one unit. Additive response from both detector elements is required for detector operation.

    5. Resistance-bridge type detector. Responds to an abnormal rate of increase of combustion products which change the impedance of second similar plate may be employed to compensate for normal ambient changes.

    6. Sensitivity. Relative degree of response of a detector.

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

    ** 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.

    (f) Fuses—maximum ampere rating of the fuse that may be installed in each fuseholder provided as part of the control unit or combination signaling system.

    TABLE 12-72-1A—CAST-METAL ENCLOSURES Col2 Col3
    DIMENSION OF AREA MINIMUM THICKNESS IN INCHES MINIMUM THICKNESS IN INCHES
    DIMENSION OF AREA Die-cast metal Castings other than die-cast
    24 square inches or less, no dimension greater than 6 inches 5/64* 1/2
    More than 24 square inches or any dimension exceeding 6 inches 3/32 1/2
    Threaded conduit opening 1/4 1/4
    Unthreaded conduit opening 1/8 1/9
    For SI: 1 inch = 25.4 mm, 1 square inch = 645 mm2.
    * Suitable reinforcing ribs may subdivide larger areas.    		 For SI: 1 inch = 25.4 mm, 1 square inch = 645 mm2.
    * Suitable reinforcing ribs may subdivide larger areas.    		 For SI: 1 inch = 25.4 mm, 1 square inch = 645 mm2.
    * Suitable reinforcing ribs may subdivide larger areas.
  • CRSC § 12-72 Medium relevance — show source text

    (b) Normal operation.

    1. A detector shall be capable of operating for all conditions of its intended performance at all sensitivity settings when employed in conjunction with any related power supply or control unit with which it is intended to be employed and indicating devices to form the system combination covered by the installation wiring diagram and any supplementary information provided.

    2. The test voltage shall be in accordance with Section 12-72-303 (a), Item 5, and the combustion products detector shall be in the normal circuit supervisory standby condition and prepared for normal signaling operation when it is connected to related devices and circuits.

    3. The introduction of combustion products into the detector chamber such as produced by a smoldering cotton lamp wick, rope or equivalent, shall result in the operation of the detector in its intended manner. Section 12-72-303 (p), Item 2.

    (c) Power input and output. The input or output current of each circuit of a combustion products detector shall not exceed the marked rating by more than 10 percent when the detector is operated under the conditions of normal use and with the detector connected to a source of supply in accordance with Section 12-72-303 (a), Item 5.

    (d) Electrical supervision.

    1. All nonreliable components such as electronic tube heaters, blower motors, capacitors, functional heating elements, etc., the failure of which may result in an open or shorted condition shall be electrically supervised. See Sections 12-72-302 (e); 12-72-303 (a), Item 3; 12-72-303 (e) and 12-72-303 (s).

    2. All electrical circuits formed by conductors extending from the installation wiring connections for interconnecting to a power supply or system control units the failure of which may result in an open or ground fault shall be electrically supervised either at the detector or at the control unit to which a detector would be connected. See Section 12-72-302 (e).

    3. The requirements of Sections 12-72-392 (d), Items 1 and 2, do not apply to the following: A. Trouble indicating circuits. B. The circuits of a detector employed only for releasing device service if the fault results in the same operation of the unit as that obtained by detection of combustion products.

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    C. A circuit for a supplementary signal annunciator, signal sounding appliance, motor controller or similar appliance provided that a break or a ground fault in no way affects the normal operation of the unit except for omission of the supplementary feature.

    (e) Electrical supervision test.

    1. The electrical circuits formed by conductors extending from the installation wiring connections of a detector for interconnection to a power supply source or system control unit initiating device circuit shall be electrically supervised so that the detector trouble signal or circuit is energized under any of the following fault conditions if the fault prevents normal operation of the detector for fire alarm signals. A. Single open or single ground fault of the connecting field wiring. B. Failure of a nonreliable component. See Sections 12-72-303 (d), Item 1; 12-72-303 (a), Item 3; and 12-72-303 (s).
    2. A motor included in a detector, such as a blower motor which is required to operate continuously during normal operation, shall be supervised to indicate stalling or burnout.
  • CRSC § 29.4 Medium relevance — show source text

    In the event that the air flow tends to change during a test run, the speed of the fan is adjusted to keep the air velocity within the specified range.

    (b) Test method.

    1. The preparation for test consists of mounting the device on the small removable screen base of [1] / 4 -inch (6 mm) hardware cloth formed to a height where the temperature sensing element is midway between the top of the chamber and the guide vane. The sample under test is positioned in the air stream so that there is no obstruction between the guide vane and sensing element. A spring wound device is mounted with the sensing element in a horizontal position. The test sample shall remain in the oven at least 5 minutes prior to starting each test run.

    2. The heating coils are permitted to preheat for 10 to 20 seconds prior to starting the test. The fan controlling the air flow is turned on and its speed adjusted to produce the required velocity. The temperatures are read every 10 seconds. The two autotransformers are adjusted as needed to obtain the desired rate of temperature rise. Normal oven temperatures at the start of the test are to be 85–90°F (29.4–32.2°C).

    3. Upon operation of the device, the current applied to the bank of heaters is cut-off and the oven is cooled to normal room temperature by means of the cooling fan.

    TABLE 12-72-2A—TEMPERATURE CLASSIFICATIONS Col2 Col3
    TEMPERATURE CLASSIFICATION RATING RANGE °F (°C) TEST TEMPERATURE °F (°C)
    Ordinary 135-174 (57-74) 125 (51.7)
    Intermediate 175-225 (79-107) 150 (66)
    TABLE 12-72-2B—TEMPERATURE CLASSIFICATIONS Col2 Col3 Col4
    TEMPERATURE
    ** CLASSIFICATION**    		 OPERATING TEMPERATURE LIMITS OPERATION OPERATION
    TEMPERATURE
    ** CLASSIFICATION**    		 Minimum °F (°C) Maximum °F (°C) Tolerance, °F (°C)
    Ordinary 128 (53.3) 165 (73.9) 10 (5.6)
    Intermediate 166 (74.4) 225 (107) 15 (8.3)

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    PROTECTIVE SIGNALING SYSTEMS

    FIGURE 12-72-2-1—TIME-TEMPERATURE CURVE—15-FOOT SPACINGS

    FIGURE 12-72-2-2—FIRE-TEST LAYOUT

    130 2025 CALIFORNIA REFERENCED STANDARDS CODE

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

    PROTECTIVE SIGNALING SYSTEMS

    FIGURE 12-72-2-3—TEST OVEN

    2025 CALIFORNIA REFERENCED STANDARDS CODE 131

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

    132 2025 CALIFORNIA REFERENCED STANDARDS CODE

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

Frequently asked questions

Which chapter do I start with when preparing a test report for a new control unit?

Start with Chapter 12‑72‑1 — follow the scope and test report content requirements in § 12-72-100 and § 12-72-101; then apply the specific performance tests listed in § 12-72-103.

Where are the endurance cycle counts defined?

Endurance counts and rates are in Table 12‑72‑1D and are implemented via the endurance paragraph in § 12-72-103 (n) (e.g., 6,000 or 40,000 cycles). file

Do listed components still need tests?

Listed components may not need individual retest if the listing and lab report are provided, but the combination must undergo performance tests to confirm compatibility per § 12-72-101 (b).

How many detector samples are required for Chapter 12‑72‑3 tests?

At least 20 assembled detectors plus the additional samples specified (unassembled and radioactive-type extras) as stated in § 12-72-303 (a).

What is the dielectric strength test requirement for control units?

Control units must withstand 2× rated voltage + 1,000 V for 1 minute without breakdown (see § 12-72-103 (o)).

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