Potter Fire Alarm Systems User Manual
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Fire Alarm Training • 8700055 • Rev F • 4/10
DWG# 55-13
15’
20’
Double the longest distance to determine the
maximum room size.
30 Feet x 30 Feet would be the minimum
room size used.
Room Spacing for Ceiling-Mounted Visible Appliances
Maximum Room Size
Maximum Ceiling Minimum Required Light Output
Height
(Effective Density); One Light (cd)
m
ft
m
ft
cd
6.1 x 6.1
20 x 20
3.05
10
15
9.14 x 9.14
30 x 30
3.05
10
30
12.2 x 12.2
40 x 40
3.05
10
60
15.2 x 15.2
50 x 50
3.05
10
95
6.1 x 6.1
20 x 20
6.1
20
30
9.14 x 9.14
30 x 30
6.1
20
45
12.2 x 12.2
40 x 40
6.1
20
80
15.2 x 15.2
50 x 50
6.1
20
115
6.1 x 6.1
20 x 20
9.14
30
55
9.14 x 9.14
30 x 30
9.14
30
75
12.2 x 12.2
40 x 40
9.14
30
115
15.2 x 15.2
50 x 50
9.14
30
150