Document 920.0090 Rev 3.00 April 16, 2002
20
Cable Guidelines
Maximum Power Supply Cable Length (feet/meters)
Cameras With AC/DC Power Supplies
Wire gauge
Total
load
Power
supply
24 AWG
22 AWG
18 AWG
16 AWG
2.5 W
15 VDC
260/79
415/126
1055/322
1680/512
2.5 W
24 VAC
608/185
980/299
2515/767
3930/1198
3.5 W
15 VDC
60/18
100/30
250/76
400/122
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. Silent Witness
recommends using a CSA Certified/UL listed Class 2 power
adapter to ensure compliance with electrical safety standards.
Maximum Video Coaxial Cable Length (feet/meters)
Cable type RG-59
RG-6
RG-11
Wire gauge 23 AWG*
18 AWG*
16 AWG*
Maximum length (feet/meters)
750/229
1500/457
2000/610
* Copper clad steel core, 95% braided shield
