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G
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.
Recommended wire gauge for 24 V AC line.
Copper wire size
#24
(AWG)
(0.22 mm
(m)
95
Length of
Cable
(Approx.)
(ft)
314
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.
Resistance of copper wire [at 20 °C (68 °F)]
Copper wire size
#24
(AWG)
(0.22 mm
Resistance Ω/m
0.078
Resistance Ω/ft
0.026
#22
#20
#18
)
(0.33 mm
)
(0.52 mm
)
(0.83 mm
2
2
2
150
255
425
495
842
1 403
#22
#20
#18
2
)
(0.33 mm
2
)
(0.52 mm
2
)
(0.83 mm
0.050
0.03
0.018
0.017
0.010
0.006
10.5 V DC ≤ V
L : Cable length (m) (ft)
R : Resistance of copper wire (Ω/m) (Ω/ft)
V
: DC output voltage of power supply unit
A
I : DC current consumption (A). See specifica-
tions.
)
2
2
)
-15-
− 2(R x I x L) ≤ 16 V DC
A
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