LA Fire Alarm cheat sheet

Los Angeles amendments live in the LAMC (Chapter IX, Article 9, Division 3 for fire protection and alarm provisions) - the LAMC text governs where it is stricter than the model code.

NFPA 72 is the installation, inspection, testing, and maintenance standard adopted by reference; the edition in force is the one referenced in the current LAMC/LA Fire Code, not the newest published edition.

NFPA 72 Chapter 17 covers initiating devices, Chapter 18 notification, Chapter 10 circuits/pathways, Chapter 14 inspection/testing/maintenance - cite chapter numbers in submittals.

The LAFD does not accept manufacturer self-approval: equipment must be listed by a nationally recognized testing laboratory (UL) for the specific application.

Where the LAMC is silent, the adopted NFPA standard applies; where the LAMC is stricter, the LAMC controls. Document the hierarchy in the code-analysis sheet.

Occupancy classification and alarm requirements are driven by the California Fire Code as amended by the LAFD - check both the CFC section and the LAMC amendment.

A code-compliance matrix (each requirement → code section → design feature) is the standard way to demonstrate compliance at plan check.

Retrofit/alteration triggers: a change of occupancy, an increase in occupant load, or a substantial remodel can require full alarm coverage upgrade even if the existing system was legal.

A protected premises system comprises: initiating devices, notification appliances, control equipment, primary/secondary power, and the initiating/notification circuits connecting them.

Addressable devices report individually by address; conventional devices report by zone - zone size is limited by the code and by the panel's circuit capacity.

Supervision: every circuit that could impair alarm reporting must be supervised for open, short, and ground faults; unsupervised circuits are limited to specific permitted cases.

A waterflow switch is an initiating device; a tamper switch is a supervisory device - they are not interchangeable and are annunciated differently.

Elevator recall, door release, and HVAC shutdown are relay/interface functions, not notification - verify each interface is listed and supervised.

Remote annunciators must display the same alarm, supervisory, and trouble conditions as the main panel and must be supervised.

Device spacing and coverage depend on the detector type (spot smoke, projected beam, duct, heat) - never apply one spacing rule across types.

Document each device with a unique address/identifier that matches the as-built and the record of completion.

Spot-type smoke detector spacing on a smooth ceiling follows the manufacturer's listed spacing, with the 0.7 × spacing rule to walls and a 4 in. minimum from the wall.

Heat detectors have a smaller listed spacing than smoke detectors; the same 0.7 rule applies to the listed spacing for that device.

Duct smoke detectors are required where the code requires HVAC shutdown and must be installed per the manufacturer's listed airflow and straight-duct requirements.

Beam detectors require a clear path, alignment per listing, and a receiver that supervises the beam; loss of beam is a trouble, not an alarm (unless designed otherwise).

Manual pull stations: located within 5 ft of the exit door, mounted 42–48 in. above the floor (verify the adopted edition), and unobstructed along the path of egress.

Waterflow initiating devices must be listed and set to alarm within the code time window (typically 90 seconds) of sustained flow.

Detectors must be accessible for testing and maintenance; do not install where the device cannot be reached with a ladder or test tool.

Initiating device circuits must be Class A or Class B per the design; the class determines whether a single open circuit impairs the whole circuit.

Public-mode audible appliances must produce at least 15 dBA above the ambient sound level or 5 dBA above the maximum sound level lasting 60 seconds, whichever is greater.

Sleeping areas require 75 dBA at the pillow (or 15 dBA above ambient) - verify the exact adopted threshold in the edition in force.

Audible appliances in a corridor must be audible in every occupied space served; measure with the door closed.

Visible notification: candela rating must cover the room per the listing table; wall-mounted strobes are typically 80–110 cd, ceiling-mounted higher.

Visible appliances must be synchronized when multiple strobes are visible in the same field of view; unsynchronized flashing is not acceptable.

Notification appliance circuits must be supervised and must be Class A or Class B; voltage-drop calculations must be submitted for every NAC.

Voice evacuation systems require intelligible voice (STI or equivalent) and a message that is understandable in every occupied space.

NAC loading: total appliance current on a circuit must not exceed the panel's listed NAC rating with a margin for the end-of-line voltage.

Primary power: a dedicated, unswitched branch circuit with a lockable disconnect or a labeled breaker, and a visible disconnect means at the panel.

Secondary power: batteries or an engine-driven generator; batteries must be sized for the standby period plus the alarm period in the code edition in force.

Battery sizing formula: required amp-hours = (standby current × standby hours) + (alarm current × alarm hours), then apply the derating factor for the battery's end-of-life capacity.

Battery charging must restore the battery to full capacity within the code-specified recharge time; the charger must be supervised.

Battery terminals must be protected against accidental shorting, and batteries must be mounted per the manufacturer's listing.

A low-battery and a battery-missing condition must both annunciate as a trouble at the panel.

Generator-backed secondary power must be sized for the alarm load and must have a dedicated transfer arrangement with the fire alarm panel.

Document the load calculation, battery model, and charger rating in the submittal; the AHJ will check the math.

Pathway survivability levels (Level 0–4) define how long the circuit must survive a fire; the level is set by the occupancy and the system's role.

Level 1: circuits in a protected environment (e.g., a fully sprinklered building with a control room). Level 2: circuits in a protected environment plus a 2-hour rated enclosure for the control equipment.

Level 3: circuits in a 2-hour rated enclosure or a 2-hour rated cable/raceway. Level 4: circuits in a 2-hour rated enclosure plus a 2-hour rated cable/raceway.

Class A circuits return to the panel; Class B circuits do not. Class A survives a single open; Class B does not.

Fire alarm cable must be listed for the purpose (FPL, FPLR, FPLP) and installed per the manufacturer's listing and the adopted code.

Plenum-rated cable is required in environmental air spaces unless installed in a raceway that is itself plenum-rated.

Separation: fire alarm circuits must be separated from power circuits per the code; maintain the required separation in raceways and junction boxes.

Splicing: only in listed junction boxes, with listed connectors; no splices in conduit bodies unless listed for the purpose.

NFPA 72 Chapter 14 defines the inspection, testing, and maintenance (ITM) requirements; the frequency of each test is in the tables in that chapter.

Annual testing is the baseline for most initiating devices and notification appliances; some devices require semi-annual or quarterly testing.

Test records must include the device identifier, the test method, the result, the date, and the tester's name - not just a pass/fail checkbox.

Smoke detector testing uses listed aerosol or a calibrated test method; heat detectors use a listed heat source - never a flame.

Notification appliance testing must verify audibility, visibility, and synchronization, not just that the appliance operates.

Battery testing includes a load test and a check of the charger; a battery that fails the load test must be replaced, not just recharged.

Impairment procedures: notify the AHJ, the building owner, and the monitoring company before taking a system out of service; document the impairment and the restoration.

The record of completion (NFPA 72) must be filled out at installation and retained; it is the baseline for future ITM.

Fire alarm plan submittal requires: cover sheet, code analysis, device layout, riser diagram, NAC voltage-drop calculations, battery calculations, and the manufacturer's cut sheets.

The riser diagram must show every circuit, its class, its pathway survivability level, and the devices on it.

Device layout must show spacing dimensions and the 0.7 × spacing dimension to walls, not just device symbols.

The LAFD plan check process typically runs: submittal → plan check comments → corrected resubmittal → approval → permit issuance → inspection.

A permit is required before installation; a permit is not a substitute for the AHJ's acceptance test.

The acceptance test is witnessed by the AHJ; the record of completion and the as-built drawings must be available at the test.

Changes after approval require a revised submittal - field changes that deviate from the approved plans are not permitted without AHJ approval.

Keep the approved stamped set on site; the inspector will compare the installed system to the approved drawings.

Lockout/tagout applies to the fire alarm panel and to any circuit being worked; the panel must be tagged and the monitoring company notified.

Before working on a supervised circuit, place the panel in the appropriate bypass/test mode and record the bypass; restore it before leaving the site.

Personal protective equipment: safety glasses, hearing protection when testing horns/strobes, and a respirator when working in dusty or contaminated spaces.

Ladder safety: maintain three points of contact, secure the ladder, and do not work above the top rung - most jobsite injuries in this trade are falls.

Documentation set: approved plans, record of completion, ITM records, battery calculations, and the as-built. Retain per the owner's and AHJ's requirements.

Daily reports should record the work performed, the devices tested, any impairments, and the weather/conditions if relevant.

Never leave a system in bypass or alarm mode at the end of the shift; verify normal supervision before leaving.

Coordination: notify the owner, the monitoring company, and the AHJ before any test that will transmit an alarm or a trouble.

The LAFD's adopted NFPA 72 edition is the one referenced in the current LAMC; confirm the edition before citing a section number in a submittal.

The LAMC may impose requirements stricter than NFPA 72 - e.g., additional notification coverage or monitoring requirements for specific occupancies.

The California Fire Code (CFC) as amended by the LAFD sets the occupancy-based alarm requirements; the LAMC amendments layer on top.

A code-compliance matrix mapping each requirement to a code section and a design feature is the standard submittal tool.

Retrofit triggers: change of occupancy, increase in occupant load, or substantial remodel can require a full alarm upgrade.

Equipment must be listed by a nationally recognized testing laboratory for the specific application; the LAFD does not accept manufacturer self-approval.

Where the LAMC and NFPA 72 conflict, the stricter requirement governs unless the LAMC expressly states otherwise.

Document the code hierarchy (LAMC → CFC → NFPA 72) in the code-analysis sheet of every submittal.

Addressable systems identify each device individually; conventional systems identify by zone, and zone size is limited by code and panel capacity.

Supervision: every circuit that could impair alarm reporting must be supervised for open, short, and ground faults; unsupervised circuits are limited to specific permitted cases.

A waterflow switch is an initiating device; a tamper switch is a supervisory device - they annunciate differently and are not interchangeable.

Elevator recall, door release, and HVAC shutdown are relay/interface functions, not notification; verify each interface is listed and supervised.

Remote annunciators must display the same alarm, supervisory, and trouble conditions as the main panel and must be supervised.

Device spacing and coverage depend on detector type (spot smoke, projected beam, duct, heat); never apply one spacing rule across types.

Document each device with a unique address/identifier that matches the as-built and the record of completion.

Control equipment must be listed for the application and installed in a location that is accessible for testing and maintenance.

Spot-type smoke detector spacing on a smooth ceiling follows the manufacturer's listed spacing, with 0.7 × spacing to walls and a 4 in. minimum from the wall.

Heat detectors have a smaller listed spacing than smoke detectors; the 0.7 rule applies to the listed spacing for that device.

Duct smoke detectors are required where the code requires HVAC shutdown and must be installed per the manufacturer's listed airflow and straight-duct requirements.

Beam detectors require a clear path, alignment per listing, and a receiver that supervises the beam; loss of beam is a trouble, not an alarm unless designed otherwise.

Manual pull stations: within 5 ft of the exit door, mounted 42–48 in. above the floor (verify the adopted edition), and unobstructed along the path of egress.

Waterflow initiating devices must be listed and set to alarm within the code time window (typically 90 seconds) of sustained flow.

Detectors must be accessible for testing and maintenance; do not install where the device cannot be reached with a ladder or test tool.

Initiating device circuits must be Class A or Class B per the design; the class determines whether a single open circuit impairs the whole circuit.

Public-mode audible appliances must produce at least 15 dBA above the ambient sound level or 5 dBA above the maximum sound level lasting 60 seconds, whichever is greater.

Sleeping areas require 75 dBA at the pillow (or 15 dBA above ambient) - verify the exact adopted threshold in the edition in force.

Audible appliances in a corridor must be audible in every occupied space served; measure with the door closed.

Visible notification: candela rating must cover the room per the listing table; wall-mounted strobes are typically 80–110 cd, ceiling-mounted higher.

Visible appliances must be synchronized when multiple strobes are visible in the same field of view; unsynchronized flashing is not acceptable.

Notification appliance circuits must be supervised and must be Class A or Class B; voltage-drop calculations must be submitted for every NAC.

Voice evacuation systems require intelligible voice (STI or equivalent) and a message that is understandable in every occupied space.

NAC loading: total appliance current on a circuit must not exceed the panel's listed NAC rating with a margin for the end-of-line voltage.

Primary power: a dedicated, unswitched branch circuit with a lockable disconnect or a labeled breaker, and a visible disconnect means at the panel.

Secondary power: batteries or an engine-driven generator; batteries must be sized for the standby period plus the alarm period in the code edition in force.

Battery sizing formula: required amp-hours = (standby current × standby hours) + (alarm current × alarm hours), then apply the derating factor for end-of-life capacity.

Battery charging must restore the battery to full capacity within the code-specified recharge time; the charger must be supervised.

Battery terminals must be protected against accidental shorting, and batteries must be mounted per the manufacturer's listing.

A low-battery and a battery-missing condition must both annunciate as a trouble at the panel.

Generator-backed secondary power must be sized for the alarm load and must have a dedicated transfer arrangement with the fire alarm panel.

Document the load calculation, battery model, and charger rating in the submittal; the AHJ will check the math.

Pathway survivability levels (Level 0–4) define how long the circuit must survive a fire; the level is set by the occupancy and the system's role.

Level 1: circuits in a protected environment (e.g., a fully sprinklered building with a control room). Level 2: circuits in a protected environment plus a 2-hour rated enclosure for the control equipment.

Level 3: circuits in a 2-hour rated enclosure or a 2-hour rated cable/raceway. Level 4: circuits in a 2-hour rated enclosure plus a 2-hour rated cable/raceway.

Class A circuits return to the panel; Class B circuits do not. Class A survives a single open; Class B does not.

Fire alarm cable must be listed for the purpose (FPL, FPLR, FPLP) and installed per the manufacturer's listing and the adopted code.

Plenum-rated cable is required in environmental air spaces unless installed in a raceway that is itself plenum-rated.

Separation: fire alarm circuits must be separated from power circuits per the code; maintain the required separation in raceways and junction boxes.

Splicing: only in listed junction boxes, with listed connectors; no splices in conduit bodies unless listed for the purpose.

NFPA 72 Chapter 14 defines the inspection, testing, and maintenance requirements; the frequency of each test is in the tables in that chapter.

Annual testing is the baseline for most initiating devices and notification appliances; some devices require semi-annual or quarterly testing.

Test records must include the device identifier, the test method, the result, the date, and the tester's name - not just a pass/fail checkbox.

Smoke detector testing uses listed aerosol or a calibrated test method; heat detectors use a listed heat source - never a flame.

Notification appliance testing must verify audibility, visibility, and synchronization, not just that the appliance operates.

Battery testing includes a load test and a check of the charger; a battery that fails the load test must be replaced, not just recharged.

Impairment procedures: notify the AHJ, the building owner, and the monitoring company before taking a system out of service; document the impairment and the restoration.

The record of completion must be filled out at installation and retained; it is the baseline for future ITM.

Fire alarm plan submittal requires: cover sheet, code analysis, device layout, riser diagram, NAC voltage-drop calculations, battery calculations, and manufacturer's cut sheets.

The riser diagram must show every circuit, its class, its pathway survivability level, and the devices on it.

Device layout must show spacing dimensions and the 0.7 × spacing dimension to walls, not just device symbols.

The LAFD plan check process typically runs: submittal → plan check comments → corrected resubmittal → approval → permit issuance → inspection.

A permit is required before installation; a permit is not a substitute for the AHJ's acceptance test.

The acceptance test is witnessed by the AHJ; the record of completion and the as-built drawings must be available at the test.

Changes after approval require a revised submittal - field changes that deviate from the approved plans are not permitted without AHJ approval.

Keep the approved stamped set on site; the inspector will compare the installed system to the approved drawings.

Lockout/tagout applies to the fire alarm panel and to any circuit being worked; the panel must be tagged and the monitoring company notified.

Before working on a supervised circuit, place the panel in the appropriate bypass/test mode and record the bypass; restore it before leaving the site.

Personal protective equipment: safety glasses, hearing protection when testing horns/strobes, and a respirator when working in dusty or contaminated spaces.

Ladder safety: maintain three points of contact, secure the ladder, and do not work above the top rung - most jobsite injuries in this trade are falls.

Documentation set: approved plans, record of completion, ITM records, battery calculations, and the as-built. Retain per the owner's and AHJ's requirements.

Daily reports should record the work performed, the devices tested, any impairments, and the weather/conditions if relevant.

Never leave a system in bypass or alarm mode at the end of the shift; verify normal supervision before leaving.

Coordination: notify the owner, the monitoring company, and the AHJ before any test that will transmit an alarm or a trouble.

The LAFD's adopted NFPA 72 edition is the one referenced in the current LAMC; confirm the edition before citing a section number in a submittal.

The LAMC may impose requirements stricter than NFPA 72 - e.g., additional notification coverage or monitoring requirements for specific occupancies.

The California Fire Code (CFC) as amended by the LAFD sets the occupancy-based alarm requirements; the LAMC amendments layer on top.

A code-compliance matrix mapping each requirement to a code section and a design feature is the standard submittal tool.

Retrofit triggers: change of occupancy, increase in occupant load, or substantial remodel can require a full alarm upgrade.

Equipment must be listed by a nationally recognized testing laboratory for the specific application; the LAFD does not accept manufacturer self-approval.

Where the LAMC and NFPA 72 conflict, the stricter requirement governs unless the LAMC expressly states otherwise.

Document the code hierarchy (LAMC → CFC → NFPA 72) in the code-analysis sheet of every submittal.

Addressable systems identify each device individually; conventional systems identify by zone, and zone size is limited by code and panel capacity.

Supervision: every circuit that could impair alarm reporting must be supervised for open, short, and ground faults; unsupervised circuits are limited to specific permitted cases.

A waterflow switch is an initiating device; a tamper switch is a supervisory device - they annunciate differently and are not interchangeable.

Elevator recall, door release, and HVAC shutdown are relay/interface functions, not notification; verify each interface is listed and supervised.

Remote annunciators must display the same alarm, supervisory, and trouble conditions as the main panel and must be supervised.

Device spacing and coverage depend on detector type (spot smoke, projected beam, duct, heat); never apply one spacing rule across types.

Document each device with a unique address/identifier that matches the as-built and the record of completion.

Control equipment must be listed for the application and installed in a location that is accessible for testing and maintenance.

Spot-type smoke detector spacing on a smooth ceiling follows the manufacturer's listed spacing, with 0.7 × spacing to walls and a 4 in. minimum from the wall.

Heat detectors have a smaller listed spacing than smoke detectors; the 0.7 rule applies to the listed spacing for that device.

Duct smoke detectors are required where the code requires HVAC shutdown and must be installed per the manufacturer's listed airflow and straight-duct requirements.

Beam detectors require a clear path, alignment per listing, and a receiver that supervises the beam; loss of beam is a trouble, not an alarm unless designed otherwise.

Manual pull stations: within 5 ft of the exit door, mounted 42–48 in. above the floor (verify the adopted edition), and unobstructed along the path of egress.

Waterflow initiating devices must be listed and set to alarm within the code time window (typically 90 seconds) of sustained flow.

Detectors must be accessible for testing and maintenance; do not install where the device cannot be reached with a ladder or test tool.

Initiating device circuits must be Class A or Class B per the design; the class determines whether a single open circuit impairs the whole circuit.

Public-mode audible appliances must produce at least 15 dBA above the ambient sound level or 5 dBA above the maximum sound level lasting 60 seconds, whichever is greater.

Sleeping areas require 75 dBA at the pillow (or 15 dBA above ambient) - verify the exact adopted threshold in the edition in force.

Audible appliances in a corridor must be audible in every occupied space served; measure with the door closed.

Visible notification: candela rating must cover the room per the listing table; wall-mounted strobes are typically 80–110 cd, ceiling-mounted higher.

Visible appliances must be synchronized when multiple strobes are visible in the same field of view; unsynchronized flashing is not acceptable.

Notification appliance circuits must be supervised and must be Class A or Class B; voltage-drop calculations must be submitted for every NAC.

Voice evacuation systems require intelligible voice (STI or equivalent) and a message that is understandable in every occupied space.

NAC loading: total appliance current on a circuit must not exceed the panel's listed NAC rating with a margin for the end-of-line voltage.

Primary power: a dedicated, unswitched branch circuit with a lockable disconnect or a labeled breaker, and a visible disconnect means at the panel.

Secondary power: batteries or an engine-driven generator; batteries must be sized for the standby period plus the alarm period in the code edition in force.

Battery sizing formula: required amp-hours = (standby current × standby hours) + (alarm current × alarm hours), then apply the derating factor for end-of-life capacity.

Battery charging must restore the battery to full capacity within the code-specified recharge time; the charger must be supervised.

Battery terminals must be protected against accidental shorting, and batteries must be mounted per the manufacturer's listing.

A low-battery and a battery-missing condition must both annunciate as a trouble at the panel.

Generator-backed secondary power must be sized for the alarm load and must have a dedicated transfer arrangement with the fire alarm panel.

Document the load calculation, battery model, and charger rating in the submittal; the AHJ will check the math.

Pathway survivability levels (Level 0–4) define how long the circuit must survive a fire; the level is set by the occupancy and the system's role.

Level 1: circuits in a protected environment (e.g., a fully sprinklered building with a control room). Level 2: circuits in a protected environment plus a 2-hour rated enclosure for the control equipment.

Level 3: circuits in a 2-hour rated enclosure or a 2-hour rated cable/raceway. Level 4: circuits in a 2-hour rated enclosure plus a 2-hour rated cable/raceway.

Class A circuits return to the panel; Class B circuits do not. Class A survives a single open; Class B does not.

Fire alarm cable must be listed for the purpose (FPL, FPLR, FPLP) and installed per the manufacturer's listing and the adopted code.

Plenum-rated cable is required in environmental air spaces unless installed in a raceway that is itself plenum-rated.

Separation: fire alarm circuits must be separated from power circuits per the code; maintain the required separation in raceways and junction boxes.

Splicing: only in listed junction boxes, with listed connectors; no splices in conduit bodies unless listed for the purpose.

NFPA 72 Chapter 14 defines the inspection, testing, and maintenance requirements; the frequency of each test is in the tables in that chapter.

Annual testing is the baseline for most initiating devices and notification appliances; some devices require semi-annual or quarterly testing.

Test records must include the device identifier, the test method, the result, the date, and the tester's name - not just a pass/fail checkbox.

Smoke detector testing uses listed aerosol or a calibrated test method; heat detectors use a listed heat source - never a flame.

Notification appliance testing must verify audibility, visibility, and synchronization, not just that the appliance operates.

Battery testing includes a load test and a check of the charger; a battery that fails the load test must be replaced, not just recharged.

Impairment procedures: notify the AHJ, the building owner, and the monitoring company before taking a system out of service; document the impairment and the restoration.

The record of completion must be filled out at installation and retained; it is the baseline for future ITM.

Fire alarm plan submittal requires: cover sheet, code analysis, device layout, riser diagram, NAC voltage-drop calculations, battery calculations, and manufacturer's cut sheets.

The riser diagram must show every circuit, its class, its pathway survivability level, and the devices on it.

Device layout must show spacing dimensions and the 0.7 × spacing dimension to walls, not just device symbols.

The LAFD plan check process typically runs: submittal → plan check comments → corrected resubmittal → approval → permit issuance → inspection.

A permit is required before installation; a permit is not a substitute for the AHJ's acceptance test.

The acceptance test is witnessed by the AHJ; the record of completion and the as-built drawings must be available at the test.

Changes after approval require a revised submittal - field changes that deviate from the approved plans are not permitted without AHJ approval.

Keep the approved stamped set on site; the inspector will compare the installed system to the approved drawings.

Lockout/tagout applies to the fire alarm panel and to any circuit being worked; the panel must be tagged and the monitoring company notified.

Before working on a supervised circuit, place the panel in the appropriate bypass/test mode and record the bypass; restore it before leaving the site.

Personal protective equipment: safety glasses, hearing protection when testing horns/strobes, and a respirator when working in dusty or contaminated spaces.

Ladder safety: maintain three points of contact, secure the ladder, and do not work above the top rung - most jobsite injuries in this trade are falls.

Documentation set: approved plans, record of completion, ITM records, battery calculations, and the as-built. Retain per the owner's and AHJ's requirements.

Daily reports should record the work performed, the devices tested, any impairments, and the weather/conditions if relevant.

Never leave a system in bypass or alarm mode at the end of the shift; verify normal supervision before leaving.

Coordination: notify the owner, the monitoring company, and the AHJ before any test that will transmit an alarm or a trouble.