Cable Guidelines

Power supply cable maximum length (feet/meters)

 

 

 

Wire gauge

 

Total

Power

 

 

 

 

load

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.

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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