ALIBI ALI-NS4002R 빠른 설치 매뉴얼 - 페이지 6
{카테고리_이름} ALIBI ALI-NS4002R에 대한 빠른 설치 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. ALIBI ALI-NS4002R 6 페이지. 2 mp ip bullet camera
페이지 인쇄
Video arrester
Communicate
arrester
Power arrester
The resistance of
earthing conductor
must be less than 4 Ω.
Steel jacket
Lightning & Surge Protection
Wire gauge standards
Bare Wire Gauge(mm)
0.750
0.800
0.900
1.000
1.250
1.500
2.000
2.500
3.000
www.observint.com
6
Lightening rod
45° conical
envelope
The camera should be
within a 45° envelope
under the lightening rod.
American Wire Gauge
Cross-sectional Area of
(AWG)
Bare Wire (mm
2
21
0.4417
20
0.5027
19
0.6362
18
0.7854
16
1.2266
15
1.7663
12
3.1420
4.9080
7.0683
12 Vdc Wire Gauge and Transmission Distance
The following table shows the recommended maximum distance adopted for the different wire sizes when
the 12 Vdc voltage loss is less than 15%. For example, for a device with the rating power of
20 VA which is installed 77 feet (22 m) from the transformer, the minimum wire gauge required is 1.0000
mm (18 gauge).
Power (VA)
10
20
24
30
40
48
50
60
70
80
90
100
)
110
120
130
140
150
160
170
180
Wire size mm (gauge)
0.800 (20)
1.000 (18)
1.250 (16)
97 (28)
153 (44)
234 (67)
49 (14)
77 (22)
117 (33)
41 (12)
64 (18)
98 (28)
32 (9)
51 (15)
78 (22)
24 (7)
38 (11)
59 (17)
20 (6)
32 (9)
49 (14)
19 (6)
31 (9)
47 (13)
16 (5)
26 (7)
39 (11)
14 (4)
22 (6)
33 (10)
12 (3)
19 (5)
29 (8)
10.8 (3.1)
17 (5)
26 (7)
9.7 (2.8)
15 (4)
23 (7)
8.9 (2.5)
14 (4)
21 (6)
8.1 (2.3)
13 (4)
20 (6)
7.5 (2.1)
11.8 (3.4)
18 (5)
7 (2)
11 (3.1)
17 (5)
6.5 (1.9)
10.2 (2.9)
16 (4)
6.1 (1.7)
9.6 (2.7)
15 (4)
5.7 (1.6)
9 (2.6)
14 (4)
5.4 (1.5)
8.5 (2.4)
13 (4)
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2.000 (12)
617 (176)
308 (88)
257 (73)
206 (59)
154 (44)
128 (37)
123 (35)
103 (29)
88 (25)
77 (22)
69 (20)
62 (18)
56 (16)
51 (15)
47 (14)
44 (13)
41 (12)
39 (11)
36 (10)
34 (10)