Document 800-01605 Rev A
35
04/08
B
Cable Guidelines
Power supply cable maximum length (feet/meters)
Wire gauge
Total
load
Power
supply
24 AWG
22 AWG
18 AWG
16 AWG
Cameras with AC/DC power supplies
3.5 W
15 VDC
180/55
290/88
730/220
1170/352
3.5 W
24 VAC
470/143
760/232
1926/587
3065/934
Note
Calculations are based on an unregulated linear power supply which
would be the worst case. Using a regulated or switching power
supply can increase the cable distance. We recommend using a CSA
Certified/UL listed Class 2
power adapter to ensure compliance with
electrical safety standards.
Note
Calculations are based on a 15VDC power supply to allow for longer
cable runs.
Video cable maximum length (feet/meters)
Cable type
RG-59
RG-6
RG-11
Wire gauge
23 AWG*
18 AWG*
14 AWG*
Maximum length (feet/meters)
750/229
1500/457
2000/610
* Copper clad steel core, 95% braided shield
We recommend these NVT video transceivers (sold separately by NVT Inc.):
NV-212A (500 ft/152 m—26
Ω
)**
NV-213A/A-M (1000 ft/305 m—52
Ω
)**
NV-652R, NV-862R or NV-1662R (3000 ft/914 m—163
Ω
)**
** Distances have been calculated using 24 AWG Twisted Pair wire.
Note
We recommend that you measure the wire distance to ensure the
capability of the twisted pair product is not exceeded. Use an
ohmmeter to measure wire resistance by shorting the two conductors
together at the far end, then measure the loop resistance out and
back. Compare to the table below.
Maximum length (feet/meters)
AWG
250/76
500/152
1000/305
1500/457
2000/610
18
3
Ω
6
Ω
13
Ω
19
Ω
26
Ω
20
5
Ω
10
Ω
20
Ω
30
Ω
40
Ω
22
8
Ω
17
Ω
33
Ω
48
Ω
66
Ω
24
13
Ω
26
Ω
52
Ω
78
Ω
108
Ω
Note
Use point-to-point Unshielded Twisted Pair wire only.
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