#161 – NFPA 101 Fire Alarm Systems, Part 1: Understanding Initiation, Occupant Notification, and Monitoring

There are many ways to configure a fire alarm system to activate and notify others of an emergency

Buildings have different kinds of hazards, people with varying levels of mobility, and structures that affect occupants’ ability to evacuate in the event of a fire. That’s why the National Fire Protection Association’s NFPA: 101 Life Safety Code dictates different requirements for three key components of a fire alarm system, among others: what sets it off, how it alerts people in the building, and whether and how it must be monitored for the purpose of immediate response by emergency forces.

NFPA 101 calls these three components “initiation,” “occupant notification,” and “emergency forces notification.” In this article, we explore the various ways that a fire alarm system might accomplish these tasks according to code.

Check out later installments of this series to learn NFPA’s requirements for how each different occupancy type – the essential method by which buildings are classified – must uniquely fulfill these requirements.

What will initiate the fire alarm system?

Initiation, aka how the alarm goes off in the first place, can happen one of three ways: someone sets it off manually, a smoke detector or other automatic detection system triggers it, or an extinguishing system (e.g., overhead sprinklers) sets it off. NFPA 101, 9.6.2.1 lays those options out very clearly.

However, the particulars of those methods are less straightforward and depend largely on the occupancy type in which they are used. Read through all of Section 9.6.2 to learn what the essential (and rather detailed) initiation requirements are. As for understanding the basics of NFPA-compliant fire alarm initiation, the guidelines below should get you off to a good start.

Manual initiation

Let’s begin with manual initiation, which is generally achieved by a manual fire alarm box, also known as a pull station. Section 9.6.2.3 details exactly where these manual fire alarm boxes should be located.

From the 2018 edition of NFPA 101

9.6.2.3 A manual fire alarm box shall be provided as follows, unless modified by another section of this Code:

(1) For new alarm system installations, the manual fire alarm box shall be located within 60 in. (1525 mm) of exit doorways.

(2) For existing alarm system installations, the manual fire alarm box either shall be provided in the natural exit access path near each required exit or within 60 in. (1525 mm) of exit doorways.

Be sure to also see Sections 9.6.2.4-5 for guidelines on how far apart manual fire alarm boxes may be placed from one another and from building exits. Also keep in mind that the specific code for your occupancy type most likely has additional requirements for where manual alarm boxes must go. In any case, all manual fire alarm boxes should be easily visible and accessible in accordance with section 9.6.2.7. And even if a building has an automatic detection or extinguishing system, this section still requires there to be at least one manual fire alarm box in the building.

Automatic detector

Automatic detection

The second type of fire alarm initiation, automatic detection, can come in many forms. For example, some systems detect smoke, while others detect elevated heat or rate of rise, a measurement of how quickly the room temperature is increasing. The code for your specific occupancy will tell you which type of automatic detection system you need (if any). The most common type is the smoke detector, which must be automatic in cases where its coverage is considered “total” or “complete.”

From the 2018 edition of NFPA 101

Δ 9.6.2.9 Where a total (complete) coverage smoke detection system is required by another section of this Code, automatic detection of smoke in accordance with NFPA 72 shall be provided in all occupiable areas in environments that are suitable for proper smoke detector operation.

What, then, is total or complete smoke detector coverage?

NFPA 72: National Fire Alarm and Signaling Code defines it as coverage that includes “all rooms, halls, storage areas, basements, attics, lofts, spaces above suspended ceilings, and other subdivisions and accessible spaces.”(17.5.3.1) In short, if you have total coverage smoke detection, it should initiate the alarm system automatically.

Note: Most occupancies with sleeping units such as hotels, apartments, residential board and care, and others generally have smoke alarms rather than smoke detectors. And smoke alarms, much like in a one- or two-family dwelling, are required to be interconnected to each other within that dwelling unit – but aren’t always connected to the fire alarm system.

Extinguishing system operation

The third type of fire alarm initiation, extinguishing system operation, is often equipped with automatic detection. In those cases, section 9.6.2.8 dictates that the extinguishing system is configured so that its water flow initiates the alarm.

From the 2018 edition of NFPA 101

9.6.2.8 Where a sprinkler system provides automatic detection and alarm system initiation, it shall be provided with an approved alarm initiation device that operates when the flow of water is equal to or greater than that from a single automatic sprinkler.

Section 9.7 gives additional guidance for a sprinkler system’s piping, usage in lieu of heat detection devices, and supervision for cases when those elements are required by other parts of the code.

Of course, not all fires can be put out or controlled by a typical sprinkler system, so section 9.8 makes provisions for alternative extinguishment systems to be used when a building’s contents would fuel one of these types of fires. When these alternative-type systems are used, the code requires the actuation of the system to be indicated at a fire alarm panel (9.8.2.1 and 9.8.2.2).

Occupant notification: NFPA’s requirements may not be what you’d expect

Occupant notification is exactly what it sounds like: letting people in the building know that they need to get out immediately. There are a few different ways you can do this – and some will work better than others depending on who the building occupants are – but the NFPA provides one basic rule:

From the 2018 edition of NFPA 101

9.6.3.5 Unless otherwise provided in 9.6.3.5.1 through 9.6.3.5.8, notification signals for occupants to evacuate shall be by audible and visible signals in accordance with NFPA 72 and ICC/ANSI A117.1, Accessible and Usable Buildings and Facilities, or other means of notification acceptable to the authority having jurisdiction.

You can look into NFPA 72 and ICC/ANSI A117.1 for more details on installation, but the key takeaways here are “audible and visible signals.” And while that sounds simple, NFPA has a few things to say about just what these signals should entail.

From the 2018 edition of NFPA 101

9.6.3.7 Audible alarm notification appliances shall be of such character and so distributed as to be effectively heard above the average ambient sound level that exists under normal conditions of occupancy.

9.6.3.8 Audible alarm notification appliances shall produce signals that are distinctive from audible signals used for other purposes in a given building.

Basically, the nature of audible alarms should be such that you will certainly hear them – whether you are sleeping, whether there is the noise from a crowd, or whatever ambient conditions exist. As for visible alarms, look at NFPA 72, 18.5.3 for details like the required pulse duration and flash rate of strobe lights, and read NFPA 101, 9.6.3.5.1-7 for all the cases in which you don’t actually need them.

There’s one other method of occupant notification, and that’s voice announcements. According to section 9.6.3.9, these should give instructions for how to evacuate the building or relocate to a safer part of it, and they can be either recorded or announced live. See sections 9.6.3.9.1-2 for more details on how a voice announcement should sound and be carried over an existing PA system.

It would be natural to assume that NFPA wants us to notify all occupants every time a fire alarm is triggered, but that’s not actually so. NFPA 101 actually allows some fire alarm notifications to occur on a “need-to-know” basis only.

From the 2018 edition of NFPA 101

9.6.3.6.2* Where total evacuation of occupants is impractical due to building configuration, only the occupants in the affected zones shall be initially notified, and provisions shall be made to selectively notify occupants in other zones to afford orderly evacuation of the entire building, provided that such arrangement is approved by the authority having jurisdiction.

Δ 9.6.3.6.3 Where occupants are incapable of evacuating themselves because of age, physical or mental disabilities, or physical restraint, all of the following shall apply:

(1) The private operating mode, as described in NFPA 72 shall be permitted to be used.

(2) Only the attendants and other personnel required to evacuate occupants from a zone, area, floor, or building shall be required to be notified.

(3) Notification of personnel as specified in 9.6.3.6.3(2) shall include means to readily identify the zone, area, floor, or building in need of evacuation.

The implication is that sometimes you don’t want alarms to cause panic for occupants who aren’t able to get themselves to safety, whether that’s because of the building’s limitations or their own. That’s what private operating mode in section 9.6.3.6.3(1) is all about. Check the code for your specific occupancy type to see if private operating mode is permitted in your building.

From the 2019 edition of NFPA 72

3.3.193.1 Private Operating Mode. Audible or visual signaling only to those persons directly concerned with the implementation and direction of emergency action initiation and procedure in the area protected by the fire alarm system.

If you backtrack through the code a bit, you’ll see that NFPA 101, 9.6.3.2.1-4 also present many cases where detectors don’t have to set off occupant notification, like smoke detectors for elevator hoist ways, closing dampers, and automatic door releases, to name a few. Note that in these exceptional cases, you may only forgo occupant notification if the detector’s power supply is monitored by the building’s fire alarm system and its activation signals a constantly-attended location.

Some occupancies will also allow alarms to run what’s called a “positive alarm sequence” in accordance with section 9.6.3.4.

NFPA 72 defines this as “an automatic sequence which results in an alarm signal, even when manually delayed for investigation, unless the system is reset.” (3.3.205) It allows 15 seconds for someone to acknowledge the signal at the fire alarm control unit before it automatically initiates notification signals and evacuation or relocation announcements (23.8.1.2.1.1(2)). If someone acknowledges the signal within that time, they then have 180 seconds to investigate the premises and either reset the system or confirm the alarm (23.8.1.2.1.1(3)).

Essentially, the alarm can be delayed from notifying occupants for a period of time while someone investigates the cause of its triggering – an especially handy feature in buildings where occupants may be tempted to set off an alarm when there isn’t really a fire.

If you need fire alarm monitoring, you have a few options

Fire alarm monitoring ensures that even if no one is in the building when a fire occurs, emergency forces will still be contacted. Typically, monitored alarm systems will have a fire alarm control panel (FACP) installed which transmits any alarm signals to a supervising station. Not all occupancies require monitoring for their fire alarm systems, but those that do are held to section 9.4.6 of NFPA 101, which gives a few options for how to monitor alarms and notify emergency forces.

From the 2018 edition of NFPA 101

9.6.4.2 Where emergency forces notification is required by another section of this Code, the fire alarm system shall be arranged to transmit the alarm automatically via any of the following means acceptable to the authority having jurisdiction and shall be in accordance with NFPA 72:

(1) Auxiliary fire alarm system
(2) Central station fire alarm system
(3) Proprietary supervising station fire alarm system
(4) Remote supervising station fire alarm system

The most common of these methods, central station monitoring, connects the fire alarm system to a monitoring station via phone line, mobile line, Internet (IP), or another communication medium. Trained staff members then alert emergency services to the facility’s alarm signal. Auxiliary fire alarm monitoring works in the same way, except that instead of signaling a monitoring station, the alarm transmits directly to the municipal emergency force’s communication center.

Proprietary supervising stations are located within one of the several properties they monitor. This method is for owners of many different properties who want to take care of alarm monitoring themselves. Conversely, facilities with remote supervising station monitoring have alarms transmitted to any location that receives signals from properties under multiple different ownership. These types of monitoring stations aren’t subject to the recording and reporting requirements that govern how central station monitoring services must receive alarm signals. Section 26.3.9 of NFPA 72 details those requirements in full.

However the monitoring is to take place, visible and audible alarms should activate in that station when the system is triggered. If none of the monitoring options above are feasible, the facility may use a different, approved plan for notifying emergency forces. Refer to NFPA 72 for guidance on creating a compliant plan.

A fire alarm control panel.
A fire alarm control panel.

Another determining factor in how to configure an alarm system is whether your state or city has adopted an edition of the International Building Code (IBC), and which year they have approved. IBC requires all sprinkler systems (except for those in commercial kitchens and one- and two-family dwellings) to be monitored by a supervising station.

From the 2018 edition of IBC

901.6 Supervisory service.

Where required, fire protection systems shall be monitored by an approved supervising station in accordance with NFPA 72.

901.6.1 Automatic sprinkler systems.

Automatic sprinkler systems shall be monitored by an approved supervising station.

Exceptions:

1. A supervising station is not required for automatic sprinkler systems protecting one-and two-family dwellings.
2. Limited area systems in accordance with Section 903.3.8.

Of course, whether or not your region has adopted the 2018 edition of IBC is far from the only thing that might require you to have your fire alarms monitored. Your occupancy type is the most important consideration in knowing exactly what’s required in terms of monitoring, and it determines a good deal of your initiation and occupant notification requirements as well.

What are the next steps in keeping your building’s fire alarm compliant?

Now that you’re up to speed on exactly what these components of a fire alarm system are, keep an eye out for the next two installments in this series. We’ll discuss exactly what each occupancy type needs for an NFPA-compliant fire alarm system and how building owners execute these model codes.

If you need alarm bells, check out our selection. Viking pull stations manufactured by Potter Electric Signal Company are also available for pre-order at QRFS; simply contact us at (888) 361-6662 or email support@qrfs.com.

18 thoughts on “#161 – NFPA 101 Fire Alarm Systems, Part 1: Understanding Initiation, Occupant Notification, and Monitoring”

  1. hello,
    are hospitals required to have an outside fire alarm monitoring company plus an internal 24/7 person monitoring the panel? thanks

    Reply
    • Joel, thank you for reaching out. This is a complicated question – in short, you should work with your local authority having jurisdiction to determine the requirements for your building. Generally speaking, NFPA 101 does not require both external fire monitoring and an internal, constantly attended location. For example: “9.6.4.4 For other than existing installations, where fire alarm systems are required to provide emergency forces notification, supervisory signals and trouble signals shall sound and be visibly displayed either at an approved, remotely located receiving facility or at a location within the protected building that is constantly attended by qualified personnel.” But there are specific provisions and scenarios that may require constant supervision and notification. For example, if a section of a hospital contains people who can’t move and exit in an emergency—and a presignal alarm mode is employed (it does not sound an audible alarm)—then yes, onsite staff must be notified and take action, regardless of external monitoring. Again, contact your local authority having jurisdiction to assess your exact requirements.

      Reply
  2. in a 80,000 sqfoot warehouse storage building (not high pile storage, not high hazard) with 12,000 sq foot office space. fully sprinklered building. we intend to monitor the fire flow and tampers only, install one SD above panel, one exterior H/S at sprinkler system fire dept standpipe. are pull stations required? are other notifications devices required

    Reply
    • Joe, thanks for reaching out. Your buildings specific requirements will be determined by your local authority having jurisdiction (AHJ). Your AHJ is the ultimate arbiter of what will or won’t work in terms of a structure’s fire protection measures.

      Reply
  3. I was ask to finalize a new installation for Fire Alarms locally and remote notification. What does these means or refer to in your expert opinion?

    Reply
    • Hello Zareen — Locally just means it notifies people onsite; remote means it sends a notification to whatever party needs to be notified.

      Reply
  4. i have always had trouble in determining when alarm notification is require for a building by codes. I my project needs to comply with 2018 IBC and 2018 IFC with no local amendments and its administration building then IBC does not require fire alarm system and alarm notification in ch 9 based on occupancy size, occupant load. And neither sprinkler system is required for my building. But if i do need to provide smoke detection in the electrical/control room of this admin. building based on industry practice. Do i need to provide alarm notification devices (horn/strobe) throughout the admin. building or just the electrical room or none are required. I would assume since fire alarm system is not required for this building or control room that would also mean alarm notification is still not require even if i put smoke detection for industry practice. I just dont see IBC describing clearly where notification is required. CH 9 describes requirement for alarm notification for only couple of occupancies but does not mention anything about group B, F or H occupancies.

    Reply
    • Tanwir — thanks for reaching out. For system application/code questions like this, we recommend submitting your question through QRFS Ask A Fire Pro. Click the link to submit your question with some information about your building or system, and a fire protection professional will provide a detailed answer based on standards and codes. Our pros include AHJs, contractors, engineers, and code experts with 150+ years of combined experience!

      Reply
  5. Dear Team
    I have a theater building that has a non functioning Fire Alarm system, occupants estimated between 1000 and 2500 each time
    the fire fighting system is disabled due to leakages in different areas.

    is there a code that allows me to keep using the building?
    is there a code that force me not to use the building ?
    is there code exceptions that can be used to occupy the building even with non functioning FF & FA systems ?

    your guidance is highly appreciated

    Reply
    • MG — thanks for reaching out. For code questions like this, we recommend submitting your question through QRFS Ask A Fire Pro. Click the link to submit your question with some information about your building or system, and a fire protection professional will provide a detailed answer based on standards and codes. Our pros include AHJs, contractors, engineers, and code experts with 150+ years of combined experience!

      Reply
  6. If a fire occurs in a a high rise building and the location of the fire is directly next to the elevator shafts, is the building still only required to notify those on that floor, that floor below and that floor above in a private system? The elevators seem to me like they span each floor, therefore anyone directly next to the elevator shaft should be notified or at least be notified not use the elevator during that time.

    Is there a threshold for when the rest of the building is supposed to be notified of a fire?

    Reply
    • Jennifer – For code and standards interpretation questions like this, you can try our Ask a Fire Pro service. Click the link to submit your question with some information about your building, and a fire protection professional will provide an answer based on standards and codes. Our pros include AHJs, contractors, engineers, and code experts with 150+ years of combined experience!

      Reply
  7. Hi, I would just want to ask if it is madatory to have an authomatic Fire alarm system in a school building with 3 story.
    The school has already manual fire alarm box.

    Thank you

    Reply
    • Irene — For code questions like this, you can try our Ask a Fire Pro service. Click the link to submit your question with some information about your building, and a fire protection professional will provide an answer based on best practices, standards, and codes. Our pros include AHJs, contractors, engineers, and code experts with 150+ years of combined experience!

      Reply
    • Craig — For standards and code questions like this, you can try our Ask a Fire Pro service. Click the link to submit your question with some information about your building, and a fire protection professional will provide an answer based on best practices, standards, and codes. Our pros include AHJs, contractors, engineers, and code experts with 150+ years of combined experience!

      Reply

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