Edwards Signaling FIRE ALARM EQUIPMENT Application Information

FIRE ALARM EQUIPMENT

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Edwards

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Strobe Application Data

Description

The National Fire Protection Associa­tion (NFPA) has estab lished guide­lines for the installation of visual sig­naling appliances for rooms, corri­dors, and sleeping areas. These
guidelines, referenced in NFP A 72,
take into consideration the effective
intensity of the strobe light, the size of
the space, and whether the appliance
is installed on the wall or ceiling.
Edwards synchronous, fire alarm
strobes are listed to UL Standard
1971 and conform to the ADA (Ameri­cans with Disabilities Act) equivalent
facilitation when installed using these
guidelines. Consult the Authority
Having Jurisdiction.

Space Allocation for Rooms

Table 1 provides the candela r ating
required for strobes when installed
on walls in rooms of varying size.
When ceiling mounted, the number of
strobes may be reduced while con­tinuing to provide equivalent facilita­tion. Table 2 lists room, ceiling height,
and appropriate light intensity for the
given space.

Space Allocation for Corridors

Strobes mounted in corridors not
greater than 20 feet (6.1m) wide shall
be located no more than 15 feet
(4.6m) from the end of the corridor
with a separation no greater than 100
feet (30.5m) between appliances.
They shall be wall mounted in accor­dance with Table 3.

Space Allocation for Sleeping Rooms

Wall mounted strobes with the top of
the strobe greater than 24 inches
(61cm) from the ceiling shall be rated
110 cd. Strobes closer to the ceiling
than 24 inches (61cm) shall be rated
177 cd. The distance from the strobe
to the pillow must not exceed 16 feet.

D-04

Table 1

Minimum Required Light Output, Candela (CD)

Max. Room One Light Per (On Opposite (One per Wall)

Size Room (CD) Walls) (CD) (CD)
20' x 20' 1
30' x 30' 30 15 —
40' x 40' 60 30 15
50' x 50' 95 60 30
60' x 60' 13 5 95 30
70' x 70' 18 5 11 0 60
80' x 80' — 14 0 60

Note: The bottom of the wall mounted appliance should be not less than 80 inches

(203cm) or more than 96 inches (244cm) from the floor.

5 — —

Effective Intensity

Two Per Room Four Per Room

Table 2

Minimum Required Light Output, Candela (CD)

Max. Room Maximum Ceiling

Size Height (ft.)
20' x 20' 1
30' x 30' 10 30
40' x 40' 10 60
50' x 50' 10 95
20' x 20' 20 30
30' x 30' 20 45
40' x 40' 20 80
50' x 50' 20 11 5
20' x 20' 30 55
30' x 30' 30 75

Note: Where ceiling heights exceed 30 ft. (91.4m), visible signaling appliances

should be suspended at or below 30 ft. (91.4m) or wall mounted.

Note: The above table is based on locating the visible signaling appliance at the

center of the room. Where it is not located at the center of the room, the
effective intensity (cd) should be determined by doubling the distance from the
appliance to the farthest wall to obtain the max. room size.

Effective Intensity

One Light (CD)

0 15

Table 3

Corridor Length (ft.) Appliances Required

0-30 1

31-130
131-230 3
231-330 4
331-430 5
431-530 6

Min. Number of 15 cd Visible

2

12-50

© Copyright 2004 Edwards