D
C
HSI #780-0867
FireSpy Tracker
Installation Manual
39
Table 3-2: Wire Lengths for powering devices (worst case)*
Load (A)
Maximum distance to farthest point (ft)
18 AWG
16 AWG
14 AWG
12 AWG
0.10
1878
2984
4753
7561
0.25
751
1194
1901
3024
0.50
376
597
951
1512
0.75
250
398
634
1008
1.00
188
298
475
756
1.25
150
239
380
605
1.50
125
199
317
504
1.75
107
171
272
432
2.00
94
149
238
378
2.25
83
133
211
336
2.50
75
119
190
302
2.75
68
109
173
275
3.00
63
99
158
252
*
The result is for the worst case loading. Best case loading allows the cable to be twice as long, considering resistance only.
These values were obtained using Eq. C-1 with a maximum voltage drop of 2.4V
Table 3-3: Wire Lengths for powering T8000 devices*
Module
Voltage
drop (V)
Load
(mA)
Maximum distance to device (ft)
18 AWG
16 AWG
14 AWG
12 AWG
RAN / ANN
6
80
5869
9325
14854
23627
LDV
6
TBD
TBD
TBD
TBD
TBD
LCU
4.6
1150
313
497
792
1260
CM (one zone)
6
54
8695
13815
22006
35004
CM (five zones)
6
214
2194
3486
5553
8833
SRM
6
230
2041
3244
5167
8218
*
These distances are valid if only one device is powered by the cable. If more than one device is connected to the cable, the
distance must be based on the voltage drop at each device. Other considerations may also apply.
These values were obtained using Eq. C-1 with a maximum voltage drop and current draw as specified for each device.