●Cable Length and Wire Gauge
24 V AC
The recommended cable length and thickness are
shown in the table for reference. The voltage sup-
plied to the power terminals of the camera should
be within 19.5 V AC and 28 V AC.
12 V DC
Use the formula below to calculate the power cable
and power supply. The voltage supplied to the
power terminals of the camera should be within
10.5 V DC and 16 V DC.
Copper wire size
(AWG)
-15-
10.5 V 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 specifica-
tions.
Recommended wire gauge for 24 V AC line.
Length of
Cable
(Approx.)
#24
(0.22 mm2)
95
314
#22
(0.33 mm2)
150
495
#20
(0.52 mm2)
255
842
#18
(0.83 mm2)
425
1 403
(m)
(ft)
Resistance Ω/ft
Copper wire size
(AWG)
Resistance Ω/m
#24
(0.22 mm2)
0.078
0.026
#22
(0.33 mm2)
0.050
0.017
#20
(0.52 mm2)
0.03
0.010
#18
(0.83 mm2)
0.018
0.006
Resistance of copper wire [at 20 °C (68 °F)]