31
• Cord length and wire gauge
24 V AC
The recommended cord length and copper
wire size are shown in the table for reference.
The voltage supplied to the camera should be
between 19.5 V AC and 28 V AC.
Recommended wire gauge for 24 V AC line.
Copper wire
size (AWG)
#24
(0.22 mm
2
)
#22
(0.33 mm
2
)
#20
(0.52 mm
2
)
#18
(0.83 mm
2
)
Length of
c a b l e
(approx.)
m
20
30
45
75
ft
66
100
150
250
12 V DC
The recommended resisance and copper wire
size are shown in the table for reference.
The voltage supplied to the camera should be
between 10.8 V DC and 16 V DC.
Resistance of copper wire [20 °C {68 °F}]
Copper wire size
(AWG)
#24
(0.22 mm
2
)
#22
(0.33 mm
2
)
#20
(0.52 mm
2
)
#18
(0.83 mm
2
)
Resistance (Ω/m)
0.078
0.050
0.03
0.018
Resistance (Ω/ft)
0.024
0.015
0.009
0.005
Use the formula below to calculate the power
cord and power supply.
"L", "R", "V
A
", "I" shall satisfy the inequalitty
below.
10.8 V DC ≤ V
A
- 2(R x I x L) ≤ 16 V DC
L: Cord length (m) {ft}
R: Resistance of copper wire (Ω/m) {Ω/ft}
V
A
: DC output voltage of power supply unit
I: DC current consumption (A). See speci-
fications.
Important:
• When using 12 V DC power supply, the
heater is unavailable.
