Wire Ampacity Rating; Distance Limitations; Fire Alarm Contacts - CaptiveAire EWC Installation, Operation And Maintenance Manual

Wire Ampacity Rating

The load current rating and the over-current protection for conductor types shall not exceed 15 amperes
for 14 AWG, 20 amperes for 12 AWG, and 30 amperes for 10 AWG aluminum and copper-clad aluminum
after any correction factors for ambient temperature and number of conductors have been applied.

Distance Limitations

Wiring connections to remote fire protection system(s) must use shielded twisted pair wire. The maximum
length of this connection is 1000 feet.
Wire size is an important consideration when making the connections between the fire protection system
control package and a gas valve. Refer to Table 16 for maximum wiring distance between the system and
remote gas valve.

Fire Alarm Contacts

The fire protection system is equipped with normally open contacts that can be connected to the premise
Fire Alarm Control Panel (FACP) (terminals AL1 and AL2). During a fire condition, the contacts will close
and trigger the premise FACP to initiate a general fire alarm.
1. Building Fire Alarm
2. Control Panel Fire Alarm Contact
3. End of Line Device
4. Alarm Input
Table 15 - Copper Wire Ampacity @ 75°C
Wire Size AWG
14
12
10
8
6
4
Table 16 - Wiring Maximum Distance
Wire Gauge
12
14
16
18
20
22
24
Figure 42 - Fire Alarm Reference
4
49
Maximum Amps
15
20
30
50
65
85
Distance (Feet)
1049
660
414
260
164
103
64
1
AL2
AL1
2
3