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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.
Video cable maximum length (feet/meters)
Cable type RG-59RG-6RG-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.