Installation Guide
Model NV-EC1701 EoC Ethernet over Coax Transceiver
with PoE, PoE+, or High Power PoE
WIRE DISTANCE CHARTS
Page 8 of 14
3.0 W
0 W
Wire Distance
Wire Distance
4.0 W
5.0 W
6.0 W
8.0 W
10 W
12 W
15 W
18 W
20 W
25 W
30 W
40 W
50 W
10
m
1
2
m
1
5
m
1
8
m
20 m
25
m
30
m
40 m
50 m
60
m
80 m
100
m
1
20
m
1
50 m
1
80 m
200
m
250
m
300
m
400
m
500
m
600
m
800
m
1,000 m
1
,200
m
1
,500
m
1
,800
m
2,000 m
33 ft
40 ft
49 ft
59 ft
66 ft
82 ft
98 ft
131 ft
164 ft
197 ft
262 ft
328 ft
397 ft
492 ft
590 ft
656 ft
820 ft
984 ft
1,312 ft
1,640 ft
1,968 ft
2,624 ft
3,280 ft
3,936 ft
4,920 ft
5,904 ft
6,560 ft
Camera Wattage
2,500
m
3,000
m
4,000
m
5,000
m
8,200 ft
9,840 ft
13,120 ft
16,400 ft
2.0 W
2.5 W
24 Ω
38 Ω
23 Ω
21 Ω
19 Ω
16 Ω
14 Ω
12 Ω
11 Ω
9 Ω
7 Ω
6 Ω
4 Ω
3 Ω
28 Ω
P
Po
oE
C
Cl
o
G
G
G
A
A
W
W
G
G
G
R
G
C
C
C
C
A
T
T
V
2
2
A
W
W
A
W
C
C
A
A
A
W
W
C
C
C
A
A
G
R
G
1
1
1
4
A
W
G
R
G
6
1
8
A
W
G
R
G
5
9
/
U
2
0
A
W
G
R
G
5
9
/
U
2
2
A
W
G
R
G
5
9
/
U
2
3
A
W
G
C
A
T
V
2
0
A
W
G
C
A
T
V
2
2
A
W
G
C
A
T
V
2
3
A
W
G
The distance capability of wire is dependant on its ability to deliver DC power, and separately, to deliver high-frequency
data signals.
The graph below shows maximum power delivery when using a 48V power supply. If you are using a 56V power supply,
your distances will be 2.6 times those shown in figure 4. If you are not delivering power to your camera (or other remote
device), then this graph does not apply. Figure 5 shows the maximum network data rate.
A Distance Calculator can be found at www.nvt.com.
PoE devices require a minimum of 43V to operate. With a 48V supply, we have 5V of allowable voltage drop on the wire.
With a 56V supply, we have 13V of allowable voltage drop on the wire.
The voltage will dip in proportion to the remote (camera) load. The graph below shows what distances are supported for
various loads and wire types.
● Start with the camera wattage at the left. Sometimes IP cameras are listed as to their PoE Class rather than
wattage. If this is the case, use the colored classes instead.
● Now read over to the right until you find your kind of wire. Then look up (feet) or down (meters) to find your
maximum wire distance.
● If your wire is not among the examples, simply measure its total resistance and find that value on the right side of
the graph. The maximum supported wattage is on the left.
Figure 5 - Power Distance Chart