• Cable Length and Wire Gauge
24 V AC
The recommended cable length and thick- ness are shown in the table for reference. The voltage supplied to the power terminals of the camera should be within 19.5 V AC and 28 V AC.
Recommended wire gauge for 24 V AC line.
Copper wire | #24 | #22 | #20 | #18 | |
size (AWG) |
| (0.22 mm2) | (0.33 mm2) | (0.52 mm2) | (0.83 mm2) |
|
|
|
|
|
|
Length of | (m) | 20 | 30 | 45 | 75 |
Cable |
|
|
|
|
|
|
|
|
|
| |
(Approx.) | (ft) | 65 | 100 | 160 | 260 |
|
|
|
|
|
|
12 V DC
Use the formula below to calculate the power cable and power supply. The voltage sup- plied to the power terminals of the camera should be within 10.5 V DC and 16 V DC.
Resistance of copper wire [at 20 °C (68 °F)]
Copper wire | #24 | #22 | #20 | #18 | |
size (AWG) | (0.22 mm2) | (0.33 mm2) | (0.52 mm2) | (0.83 mm2) | |
Resistance | 0.078 | 0.050 | 0.03 | 0.018 | |
Ω/m | |||||
|
|
|
| ||
Resistance | 0.026 | 0.017 | 0.010 | 0.006 | |
Ω/ft | |||||
|
|
|
|
10.5V DC ≤ VA - 2(R x I x L) ≤ 16 V DC
L : Cable length (m) (ft)
R : Resistance of copper wire (Ω/m) (Ω/ft)
VA : DC output voltage of power supply unit
I : DC current consumption (A). See specifications.
Note: When using 12 V DC power supply, the optional heater unit is unavailable.
24
