64
Advent Commercial Fire System
Determining Maximum Panel Wire Length
Example:
Using 22 gauge wire to connect the following devices on
one wire run (length of cable):
Device Current Draw (see note)
1- Hardwire 2-Line Alpha Touchpad = 120 mA
1- RF Transceiver Module = 50 mA
1-8Z Hardwire Input Module = 35 mA
Total Device Current Draw = 205 mA
Find the total device current draw in the table and match the
wire type used. In this example, the maximum recom-
mended wire length is about 154 feet. For longer lengths,
use a larger gauge wire.
Note
For self- or remotely-powered devices, the maximum rec-
ommended wire length is 4,000 feet using 22 gauge or
larger wire.
60-756
4 Input/2 Output SnapCard
10 mA
+ 2.5 mA per zone used
+ 7 mA per smoke loop used
+ 34 mA per relay used
185 mA
60-757
8Z Hardwire Input SnapCard
10 mA
+ 2.5 mA per zone used
+ 7 mA per smoke loop used
230 mA
60-758
4 Output SnapCard
6 mA
+ 34 mA per relay used
130 mA
Total
To acheive 24-hour backup Total Standby Current Draw must not exceed 650mA with 1 battery, 1350mA with 2 batteries, or
2.0A with 3 batteries for UL systems
Total Maximum Alarm Current Draw (must not exceed 5.5A)
Table A.1 System Hardwire Devices (Continued)
Part No.
Description
Qty.
Standby Current Draw
Standby
Current
Subtotal
Maximum
Current Draw
Maximum
Alarm
Current
Subtotal
Table A.2 Max. Wire Length Recommendations*
(Feet)
Total
Device
Current
Draw
(mA)
22 Gauge
(AWG)
18 Gauge
(AWG)
16 Gauge
(AWG)
14 Gauge
(AWG)
100
616
1,562
2,486
3,936
200
308
782
1,244
1,968
300
206
522
830
1314
400
154
392
622
982
500
124
314
500
792
600
104
262
416
653
700
88
224
356
564
800
78
196
312
492
900
70
174
278
438
1000
61
156
250
394
1100
56
142
226
358
1200
54
130
208
330
1300
48
120
192
304
1400
44
112
178
282
1500
42
104
166
264
1600
40
98
156
246
1700
36
92
146
232
1800
34
88
138
216
1900
32
82
132
208
2000
30
78
126
198
2100
29
74
120
188
2200
28
72
114
180
2300
27
68
108
172
2400
26
66
104
164
2500
25
64
100
158
2600
24
60
96
152
2700
23
58
92
146
2800
22
56
90
140
2900
21
54
86
136
3000
20
52
84
132
*Two volt maximum loop voltage drop.
Table A.2 Max. Wire Length Recommendations*
(Feet)
Total
Device
Current
Draw
(mA)
22 Gauge
(AWG)
18 Gauge
(AWG)
16 Gauge
(AWG)
14 Gauge
(AWG)