Over the years, it has become customary to install horn strobe over every pull station, which are required every 400 feet on centers or no greater than 200 feet travel, NFPA 101 9.6.
Where is a fire alarm strobe required?
NFPA 72 requires strobes installed in hallways and corridors to be visible from anywhere. The code states these specific requirements: Strobes must be installed no further than 100 feet apart down the length of a hallway. Strobes must be located within 15 feet of either end of a hallway.
What rooms require fire alarm strobes?
For buildings with 101 to 150 rooms, there must be five equipped rooms. Buildings with 151 to 200 sleeping rooms, six rooms must be equipped. If there are 201 to 300 sleeping rooms, seven rooms should have fire alarm strobes installed.
Are strobes required in electrical rooms?
Strobes are required in public and common use areas, with the exception of employee work areas, which are permitted to be provided with spare circuit capacity to account for future addition of strobes if needed for hearing-impaired employees.
Are strobes required in offices?
Individual employee work areas such as offices and workstations are not required to have visual strobes, unless accommodating hearing impaired employees and they must contain audible alarms and notifications.
Are horn strobes required in apartments?
Remember, strobes are needed in the following locations, Bedroom(s), Bathroom(s) and Living Room, Apartment hardwired smoke detectors, carbon monoxide, or combination devices should be equipped with dry contact relays so that the base building system can monitor the status of these sensors.
How far apart should horn strobes be?
NFPA 72 requires strobes to be located so that the illumination can be seen regardless of the viewer’s orientation, with maximum spacing between devices, not to exceed 100 ft.
Where are notification devices required?
The code does require that when the alarm signals are used for occupant notification, there must be at least one notification appliance listed for the purpose in each notification zone of the building, and that the appliances should be located so that they have the characteristics described in Chapter 18 for public …
Where are fire alarm notification devices required?
Visible notification appliances are required to be located throughout the building or area and must be of a type, size, intensity and number to ensure the intended audience, regardless of its orientation in the space or area, sees the strobe’s light.
Do fire alarm strobes need to be in sync?
In a corridor, “when more than 2 visible notification devices are in any field of view, they shall flash in synchronization.” So technically, if just two strobes are in the overall field of view (including non-direct viewing), they don’t need to be synchronized to meet NFPA 72 requirements.
What is a fire alarm strobe?
Strobes provide synchronized flashes to alert the hearing-impaired occupants to evacuate the premises. … The higher the candela rating of a strobe device, the larger its coverage area. Horn strobes combine audible and visual alarms to alert the occupants to evacuate the premises.
Do exam rooms need strobes?
Because it is not always possible to fix the occupancy of a room or space or anticipate its use by a person with a hearing impairment, visual alarms are required in every common use room or space in facilities equipped with an emergency alarm system. …
How high can a fire alarm strobe be mounted?
These devices are perfect for rooms with a high ceiling, generally above 40 feet. Ceiling-mounted strobes can’t be mounted higher than 30 feet above the floor.
What devices are on a NAC circuit?
In the Notification Appliance Circuit (NAC), conventional fire horns, bells, strobes, chimes, and speakers, all have the Notification Appliance Riser Circuit Wiring in common. This circuit, under normal circumstances, is in either one of two different conditions: Supervision or Alarm.