Determining Maximum Panel Wire Length - GE Advent Installation Instructions Manual

Part No. Description
60-756 4 Input/2 Output SnapCard
60-757 8Z Hardwire Input SnapCard
60-758 4 Output SnapCard
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)

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.
Table A.2 Max. Wire Length Recommendations*
(Feet)
Total
Device
22 Gauge 18 Gauge
Current
(AWG) (AWG)
Draw
(mA)
100 616 1,562
200 308
300 206
400 154
500 124
600 104
700 88
800 78
64
Table A.1 System Hardwire Devices (Continued)
Qty. Standby Current Draw
10 mA
+ 2.5 mA per zone used
+ 7 mA per smoke loop used
+ 34 mA per relay used
10 mA
+ 2.5 mA per zone used
+ 7 mA per smoke loop used
6 mA
+ 34 mA per relay used
16 Gauge 14 Gauge
(AWG) (AWG)
2,486 3,936
782 1,244 1,968
522 830 1314
392 622 982
314 500 792
262 416 653
224 356 564
196 312 492
Standby
Current
Subtotal
185 mA
230 mA
130 mA
Total
Table A.2 Max. Wire Length Recommendations*
(Feet)
Total
Device
22 Gauge 18 Gauge
Current
(AWG) (AWG)
Draw
(mA)
900 70 174
1000 61 156
1100 56 142
1200 54 130
1300 48 120
1400 44 112
1500 42 104
1600 40
1700 36
1800 34
1900 32
2000 30
2100 29
2200 28
2300 27
2400 26
2500
25
2600 24
2700 23
2800 22
2900 21
3000 20
*Two volt maximum loop voltage drop.
Maximum
Maximum Alarm
Current Draw Current
Subtotal
16 Gauge 14 Gauge
(AWG) (AWG)
278 438
250 394
226 358
208 330
192 304
178 282
166 264
98 156 246
92 146 232
88 138 216
82 132 208
78 126 198
74 120 188
72 114 180
68 108 172
66 104 164
64 100 158
60 96 152
58 92 146
56 90 140
54 86 136
52 84 132
Advent Commercial Fire System