Appendix H: Calculations
Current loading of the XT+ Extinguishant Control Panel is limited to the capacity of the power supplies. Installers must determine the loading placed on these power supplies by adding the sum of device loads to the no load alarm current of the XT+ Extinguishant Control Panel. The result obtained from this calculation must be below the operating current of the power supply.
The 5.25 Amp Power Supply operates the fire control panel and external loads with 5.25 Amps and reserves 1.25 Amps for charging the standby batteries.
The 10.25 Amp Power Supply operates the fire control panel and external loads with 10.25 Amps and reserves 2.25 Amps for charging the standby batteries.
Current limits are provided in Specifications for outputs of the XT+ Extinguishant Control Panel. Total device currents must be below limits provided for all outputs of the fire control panel.
The calculation of total current loading must include the sum of device loads on the circuit outputs of the XT+ Extinguishant Control Panel. Circuits to be included in this calculation for total current loading are:
- SLC Loops
- NAC Outputs
- 24V OUT
- AUX 24V
- Peripheral Interface Modules
- Network Module
- Panel Standby and Alarm Currents
The current limits provided in Specifications are maximums for individual outputs of the fire control panel. These output-levels are not intended to be summed together to determine the total current available from the XT+ Extinguishant Control Panel. Refer to these levels only when determining the limit of device-loading on each output circuit.
SLC Loop Cabling
The XT+ Extinguishant Control Panel requires that SLC Loops include wire gauge and lengths specified in tables of this section.
The maximum allowable voltage drop of 5.5 volts is necessary on the SLC loop to maintain the minimum device operating voltage of 17 volts. The worst case voltage drop occurs when the load is located at the farthest point from the terminals of the fire control panel. The worst case range of voltage at the source (Vsource) is 23 to 30.5 volts.
Example Voltage Drop Condition
The following example demonstrates the impact of cable size and length on output circuits. A twin-wire of 16 AWG cabling is connected to SLC loop 1. The length of the 16 AWG cable is 1000 ft (305 m) and the device-load on the loop is 400 mA. The device-load of 400 mA is determined from manufacturer data sheets. The following figure illustrates the example SLC voltage drop condition of 16 AWG cable:
A voltage-drop of 1.6064V DC is determined from the table of 16 AWG cable for a single wire length of 1000 ft (305 m) and a load of 400 mA. The resistance of one wire of the 16 AWG cable is 4.016 Ω at 1000 ft.
Voltage-drop of the twin cable
(Vcable 1 + Vcable 2) = (1.6064V DC + 1.6064V DC) = 3.2128V DC
Voltage at the load
Vload = Vsource - (Vcable 1 + Vcable 2) = 24V DC - (1.6064V DC + 1.6064V DC) = 20.7872V DC
A voltage of 20.7872 VDC is available to operate the device at this circuit location.
Shading of the SLC tables identify cable length and load combinations that are not permitted for SLC loop devices. Dark shading represents cable lengths that are not permitted when SLC circuits contain five or more isolators. Light shading represents cable lengths that are not permitted without the connection of isolators in the SLC circuit.
Twin cables are connected to SLC loop terminals of the XT+ Extinguishant Control Panel. Data provided in SLC tables of this section represent resistance and voltage from a single cable-conductor. Resistance and voltage levels obtained from these tables must include the secondary conductor of the twin cable during the evaluation process. SLC tables are provided for the following recommended wire gauges:
|
2.525 Ohms / 1000 ft |
|
|
16 AWG |
4.016 Ohms / 1000 ft |
|
6.385 Ohms / 1000 ft |
14 AWG Cable
| Length in feet |
Resistance |
Voltage Drop | ||||
|---|---|---|---|---|---|---|
|
@ 0.1 A |
@ 0.2 A |
@ 0.3 A |
@ 0.4 A |
@ 0.5 A |
||
|
100 |
0.2525 |
0.02525 |
0.0505 |
0.07575 |
0.101 |
0.12625 |
|
200 |
0.505 |
0.0505 |
0.101 |
0.1515 |
0.202 |
0.2525 |
|
300 |
0.7575 |
0.07575 |
0.1515 |
0.22725 |
0.303 |
0.37875 |
|
400 |
1.01 |
0.101 |
0.202 |
0.303 |
0.404 |
0.505 |
|
500 |
1.2625 |
0.12625 |
0.2525 |
0.37875 |
0.505 0 |
0.63125 |
|
600 |
1.515 |
0.1515 |
0.303 |
0.4545 |
0.606 |
0.7575 |
|
700 |
1.7675 |
0.17675 |
0.3535 |
0.53025 |
0.707 |
0.88375 |
|
800 |
2.02 |
0.202 |
0.404 |
0.606 |
0.808 |
1.01 |
|
900 |
2.2725 |
0.22725 |
0.4545 |
0.68175 |
0.909 |
1.13625 |
|
1000 |
2.525 |
0.2525 |
0.505 |
0.7575 |
1.01 |
1.2625 |
|
1100 |
2.7775 |
0.27775 |
0.5555 |
0.83325 |
1.111 |
1.38875 |
|
1200 |
3.03 |
0.303 |
0.606 |
0.909 |
1.212 |
1.515 |
|
1300 |
3.2825 |
0.32825 |
0.6565 |
0.98475 |
1.313 |
1.64125 |
|
1400 |
3.535 |
0.3535 |
0.707 |
1.0605 |
1.414 |
1.7675 |
|
1500 |
3.7875 |
0.37875 |
0.7575 |
1.13625 |
1.515 |
1.89375 |
|
1600 |
4.04 |
0.404 |
0.808 |
1.212 |
1.616 |
2.02 |
|
1700 |
4.2925 |
0.42925 |
0.8585 |
1.28775 |
1.717 |
2.14625 |
|
1800 |
4.545 |
0.4545 |
0.909 |
1.3635 |
1.818 |
2.2725 |
|
1900 |
4.7975 |
0.47975 |
0.9595 |
1.43925 |
1.919 |
2.39875 |
|
2000 |
5.05 |
0.505 |
1.01 |
1.515 |
2.02 |
2.525 |
|
2100 |
5.3025 |
0.53025 |
1.0605 |
1.59075 |
2.121 |
2.65125 |
|
2200 |
5.555 |
0.5555 |
1.111 |
1.6665 |
2.222 |
2.7775 |
|
2300 |
5.8075 |
0.58075 |
1.1615 |
1.74225 |
2.323 |
2.90375 |
|
2400 |
6.06 |
0.606 |
1.212 |
1.818 |
2.424 |
3.03 |
|
2500 |
6.3125 |
0.63125 |
1.2625 |
1.89375 |
2.525 |
3.15625 |
|
2600 |
6.565 |
0.6565 |
1.313 |
1.9695 |
2.626 |
3.2825 |
|
2700 |
6.8175 |
0.68175 |
1.3635 |
2.04525 |
2.727 |
3.40875 |
|
2800 |
7.07 |
0.707 |
1.414 |
2.121 |
2.828 |
3.535 |
|
2900 |
7.3225 |
0.73225 |
1.4645 |
2.19675 |
2.929 |
3.66125 |
|
3000 |
7.575 |
0.7575 |
1.515 |
2.2725 |
3.03 |
3.7875 |
|
3100 |
7.8275 |
0.78275 |
1.5655 |
2.34825 |
3.131 |
3.91375 |
|
3200 |
8.08 |
0.808 |
1.616 |
2.424 |
3.232 |
4.04 |
|
3300 |
8.3325 |
0.83325 |
1.6665 |
2.49975 |
3.333 |
4.16625 |
|
3400 |
8.585 |
0.8585 |
1.717 |
2.5755 |
3.434 |
4.2925 |
|
3500 |
8.8375 |
0.88375 |
1.7675 |
2.65125 |
3.535 |
4.41875 |
|
3600 |
9.09 |
0.909 |
1.818 |
2.727 |
3.636 |
4.545 |
|
3700 |
9.3425 |
0.93425 |
1.8685 |
2.80275 |
3.737 |
4.67125 |
|
3800 |
9.595 |
0.9595 |
1.919 |
2.8785 |
3.838 |
4.7975 |
|
3900 |
9.8475 |
0.98475 |
1.9695 |
2.95425 |
3.939 |
4.92375 |
|
4000 |
10.1 |
1.01 |
2.02 |
3.03 |
4.04 |
5.05 |
|
4100 |
10.3525 |
1.03525 |
2.0705 |
3.10575 |
4.141 |
5.17625 |
|
4200 |
10.605 |
1.0605 |
2.121 |
3.1815 |
4.242 |
5.3025 |
|
4300 |
10.8575 |
1.08575 |
2.1715 |
3.25725 |
4.343 |
5.42875 |
|
4400 |
11.11 |
1.111 |
2.222 |
3.333 |
4.444 |
5.555 |
|
4500 |
11.3625 |
1.13625 |
2.2725 |
3.40875 |
4.545 |
5.68125 |
|
4600 |
11.615 |
1.1615 |
2.323 |
3.4845 |
4.646 |
5.8075 |
|
4700 |
11.8675 |
1.18675 |
2.3735 |
3.56025 |
4.747 |
5.93375 |
|
4800 |
12.12 |
1.212 |
2.424 |
3.636 |
4.848 |
6.06 |
|
4900 |
12.3725 |
1.23725 |
2.4745 |
3.71175 |
4.949 |
6.18625 |
|
5000 |
12.625 |
1.2625 |
2.525 |
3.7875 |
5.05 |
6.3125 |
|
5100 |
12.8775 |
1.28775 |
2.5755 |
3.86325 |
5.151 |
6.43875 |
|
5200 |
13.13 |
1.313 |
2.626 |
3.939 |
42 |
6.565 |
|
5300 |
13.3825 |
1.33825 |
2.6765 |
4.01475 |
5.353 |
6.69125 |
|
5400 |
13.635 |
1.3635 |
2.727 |
4.0905 |
5.454 |
6.8175 |
|
5500 |
13.8875 |
1.38875 |
2.7775 |
4.16625 |
5.555 |
6.94375 |
|
5600 |
14.14 |
1.414 |
2.828 |
4.242 |
5.656 |
7.07 |
|
5700 |
14.3925 |
1.43925 |
2.8785 |
4.31775 |
5.757 |
7.19625 |
|
5800 |
14.645 |
1.4645 |
2.929 |
4.3935 |
5.858 |
7.3225 |
|
5900 |
14.8975 |
1.48975 |
2.9795 |
4.46925 |
5.959 |
7.44875 |
|
6000 |
15.15 |
1.515 |
3.03 |
4.545 |
6.06 |
7.575 |
|
6100 |
15.4025 |
1.54025 |
3.0805 |
4.62075 |
6.161 |
7.70125 |
|
6200 |
15.655 |
1.5655 |
3.131 |
4.6965 |
6.262 |
7.8275 |
|
6300 |
15.9075 |
1.59075 |
3.1815 |
4.77225 |
6.363 |
7.95375 |
|
6400 |
16.16 |
1.616 |
3.232 |
4.848 |
6.464 |
8.08 |
|
6500 |
16.4125 |
1.64125 |
3.2825 |
4.92375 |
6.565 |
8.20625 |
|
6600 |
16.665 |
1.6665 |
3.333 |
4.9995 |
6.666 |
8.3325 |
16 AWG Cable
| Length in feet |
Resistance Ω |
Voltage Drop | ||||
|---|---|---|---|---|---|---|
|
@ 0.1 A |
@ 0.2 A |
@ 0.3 A |
@ 0.4 A |
@ 0.5 A |
||
|
100 |
0.4016 |
0.04016 |
0.08032 |
0.12048 |
0.16064 |
0.2008 |
|
200 |
0.8032 |
0.08032 |
0.16064 |
0.24096 |
0.32128 |
0.4016 |
|
300 |
1.2048 |
0.12048 |
0.24096 |
0.36144 |
0.48192 |
0.6024 |
|
400 |
1.6064 |
0.16064 |
0.32128 |
0.48192 |
0.64256 |
0.8032 |
|
500 |
2.008 |
0.2008 |
0.4016 |
0.6024 |
0.8032 |
1.004 |
|
600 |
2.4096 |
0.24096 |
0.48192 |
0.72288 |
0.96384 |
1.2048 |
|
700 |
2.8112 |
0.28112 |
0.56224 |
0.84336 |
1.12448 |
1.4056 |
|
800 |
3.2128 |
0.32128 |
0.64256 |
0.96384 |
1.28512 |
1.6064 |
|
900 |
3.6144 |
0.36144 |
0.72288 |
1.08432 |
1.44576 |
1.8072 |
|
1000 |
4.016 |
0.4016 |
0.8032 |
1.2048 |
1.6064 |
2.008 |
|
1100 |
4.4176 |
0.44176 |
0.88352 |
1.32528 |
1.76704 |
2.2088 |
|
1200 |
4.8192 |
0.48192 |
0.96384 |
1.44576 |
1.92768 |
2.4096 |
|
1300 |
5.2208 |
0.52208 |
1.04416 |
1.56624 |
2.08832 |
2.6104 |
|
1400 |
5.6224 |
0.56224 |
1.12448 |
1.68672 |
2.24896 |
2.8112 |
|
1500 |
6.024 |
0.6024 |
1.2048 |
1.8072 |
2.4096 |
3.012 |
|
1600 |
6.4256 |
0.64256 |
1.28512 |
1.92768 |
2.57024 |
3.2128 |
|
1700 |
6.8272 |
0.68272 |
1.36544 |
2.04816 |
2.73088 |
3.4136 |
|
1800 |
7.2288 |
0.72288 |
1.44576 |
2.16864 |
2.89152 |
3.6144 |
|
1900 |
7.6304 |
0.76304 |
1.52608 |
2.28912 |
3.05216 |
3.8152 |
|
2000 |
8.032 |
0.8032 |
1.6064 |
2.4096 |
3.2128 |
4.016 |
|
2100 |
8.4336 |
0.84336 |
1.68672 |
2.53008 |
3.37344 |
4.2168 |
|
2200 |
8.8352 |
0.88352 |
1.76704 |
2.65056 |
3.53408 |
4.4176 |
|
2300 |
9.2368 |
0.92368 |
1.84736 |
2.77104 |
3.69472 |
4.6184 |
|
2400 |
9.6384 |
0.96384 |
1.92768 |
2.89152 |
3.85536 |
4.8192 |
|
2500 |
10.04 |
1.004 |
2.008 |
3.012 |
4.016 |
5.02 |
|
2600 |
10.4416 |
1.04416 |
2.08832 |
3.13248 |
4.17664 |
5.2208 |
|
2700 |
10.8432 |
1.08432 |
2.16864 |
3.25296 |
4.33728 |
5.4216 |
|
2800 |
11.2448 |
1.12448 |
2.24896 |
3.37344 |
4.49792 |
5.6224 |
|
2900 |
11.6464 |
1.16464 |
2.32928 |
3.49392 |
4.65856 |
5.8232 |
|
3000 |
12.048 |
1.2048 |
2.4096 |
3.6144 |
4.8192 |
6.024 |
|
3100 |
12.4496 |
1.24496 |
2.48992 |
3.73488 |
4.97984 |
6.2248 |
|
3200 |
12.8512 |
1.28512 |
2.57024 |
3.85536 |
5.14048 |
6.4256 |
|
3300 |
13.2528 |
1.32528 |
2.65056 |
3.97584 |
5.30112 |
6.6264 |
|
3400 |
13.6544 |
1.36544 |
2.73088 |
4.09632 |
5.46176 |
6.8272 |
|
3500 |
14.056 |
1.4056 |
2.8112 |
4.2168 |
5.6224 |
7.028 |
|
3600 |
14.4576 |
1.44576 |
2.89152 |
4.33728 |
5.78304 |
7.2288 |
|
3700 |
14.8592 |
1.48592 |
2.97184 |
4.45776 |
5.94368 |
7.4296 |
|
3800 |
15.2608 |
1.52608 |
3.05216 |
4.57824 |
6.10432 |
7.6304 |
|
3900 |
15.6624 |
1.56624 |
3.13248 |
4.69872 |
6.26496 |
7.8312 |
|
4000 |
16.064 |
1.6064 |
3.2128 |
4.8192 |
6.4256 |
8.032 |
|
4100 |
16.4656 |
1.64656 |
3.29312 |
4.93968 |
6.58624 |
8.2328 |
|
4200 |
16.8672 |
1.68672 |
3.37344 |
5.06016 |
6.74688 |
8.4336 |
|
4300 |
17.2688 |
1.72688 |
3.45376 |
5.18064 |
6.90752 |
8.6344 |
|
4400 |
17.6704 |
1.76704 |
3.53408 |
5.30112 |
7.06816 |
8.8352 |
|
4500 |
18.072 |
1.8072 |
3.6144 |
5.4216 |
7.2288 |
9.036 |
|
4600 |
18.4736 |
1.84736 |
3.69472 |
5.54208 |
7.38944 |
9.2368 |
|
4700 |
18.8752 |
1.88752 |
3.77504 |
5.66256 |
7.55008 |
9.4376 |
|
4800 |
19.2768 |
1.92768 |
3.85536 |
5.78304 |
7.71072 |
9.6384 |
|
4900 |
19.6784 |
1.96784 |
3.93568 |
5.90352 |
7.87136 |
9.8392 |
|
5000 |
20.08 |
2.008 |
4.016 |
6.024 |
8.032 |
10.04 |
|
5100 |
20.4816 |
2.04816 |
4.09632 |
6.14448 |
8.19264 |
10.2408 |
|
5200 |
20.8832 |
2.08832 |
4.17664 |
6.26496 |
8.35328 |
10.4416 |
|
5300 |
21.2848 |
2.12848 |
4.25696 |
6.38544 |
8.51392 |
10.6424 |
|
5400 |
21.6864 |
2.16864 |
4.33728 |
6.50592 |
8.67456 |
10.8432 |
|
5500 |
22.088 |
2.2088 |
4.4176 |
6.6264 |
8.8352 |
11.044 |
|
5600 |
22.4896 |
2.24896 |
4.49792 |
6.74688 |
8.99584 |
11.2448 |
|
5700 |
22.8912 |
2.28912 |
4.57824 |
6.86736 |
9.15648 |
11.4456 |
|
5800 |
23.2928 |
2.32928 |
4.65856 |
6.98784 |
9.31712 |
11.6464 |
|
5900 |
23.6944 |
2.36944 |
4.73888 |
7.10832 |
9.47776 |
11.8472 |
|
6000 |
24.096 |
2.4096 |
4.8192 |
7.2288 |
9.6384 |
12.048 |
|
6100 |
24.4976 |
2.44976 |
4.89952 |
7.34928 |
9.79904 |
12.2488 |
|
6200 |
24.8992 |
2.48992 |
4.97984 |
7.46976 |
9.95968 |
12.4496 |
|
6300 |
25.3008 |
2.53008 |
5.06016 |
7.59024 |
10.12032 |
12.6504 |
|
6400 |
25.7024 |
2.57024 |
5.14048 |
7.71072 |
10.28096 |
12.8512 |
|
6500 |
26.104 |
2.6104 |
5.2208 |
7.8312 |
10.4416 |
13.052 |
|
6600 |
26.5056 |
2.65056 |
5.30112 |
7.95168 |
10.60224 |
13.2528 |
18 AWG Cable
| Length in feet |
Resistance Ω |
Voltage Drop | ||||
|---|---|---|---|---|---|---|
|
@ 0.1 A |
@ 0.2 A |
@ 0.3 A |
@ 0.4 A |
@ 0.5 A |
||
|
100 |
0.6385 |
0.06385 |
0.1277 |
0.19155 |
0.2554 |
0.31925 |
|
200 |
1.277 |
0.1277 |
0.2554 |
0.3831 |
0.5108 |
0.6385 |
|
300 |
1.9155 |
0.19155 |
0.3831 |
0.57465 |
0.7662 |
0.95775 |
|
400 |
2.554 |
0.2554 |
0.5108 |
0.7662 |
1.0216 |
1.277 |
|
500 |
3.1925 |
0.31925 |
0.6385 |
0.95775 |
1.277 |
1.59625 |
|
600 |
3.831 |
0.3831 |
0.7662 |
1.1493 |
1.5324 |
1.9155 |
|
700 |
4.4695 |
0.44695 |
0.8939 |
1.34085 |
1.7878 |
2.23475 |
|
800 |
5.108 |
0.5108 |
1.0216 |
1.5324 |
2.0432 |
2.554 |
|
900 |
5.7465 |
0.57465 |
1.1493 |
1.72395 |
2.2986 |
2.87325 |
|
1000 |
6.385 |
0.6385 |
1.277 |
1.9155 |
2.554 |
3.1925 |
|
1100 |
7.0235 |
0.70235 |
1.4047 |
2.10705 |
2.8094 |
3.51175 |
|
1200 |
7.662 |
0.7662 |
1.5324 |
2.2986 |
3.0648 |
3.831 |
|
1300 |
8.3005 |
0.83005 |
1.6601 |
2.49015 |
3.3202 |
4.15025 |
|
1400 |
8.939 |
0.8939 |
1.7878 |
2.6817 |
3.5756 |
4.4695 |
|
1500 |
9.5775 |
0.95775 |
1.9155 |
2.87325 |
3.831 |
4.78875 |
|
1600 |
10.216 |
1.0216 |
2.0432 |
3.0648 |
4.0864 |
5.108 |
|
1700 |
10.8545 |
1.08545 |
2.1709 |
3.25635 |
4.3418 |
5.42725 |
|
1800 |
11.493 |
1.1493 |
2.2986 |
3.4479 |
4.5972 |
5.7465 |
|
1900 |
12.1315 |
1.21315 |
2.4263 |
3.63945 |
4.8526 |
6.06575 |
|
2000 |
12.77 |
1.277 |
2.554 |
3.831 |
5.108 |
6.385 |
|
2100 |
13.4085 |
1.34085 |
2.6817 |
4.02255 |
5.3634 |
6.70425 |
|
2200 |
14.047 |
1.4047 |
2.8094 |
4.2141 |
5.6188 |
7.0235 |
|
2300 |
14.6855 |
1.46855 |
2.9371 |
4.40565 |
5.8742 |
7.34275 |
|
2400 |
15.324 |
1.5324 |
3.0648 |
4.5972 |
6.1296 |
7.662 |
|
2500 |
15.9625 |
1.59625 |
3.1925 |
4.78875 |
6.385 |
7.98125 |
|
2600 |
16.601 |
1.6601 |
3.3202 |
4.9803 |
6.6404 |
8.3005 |
|
2700 |
17.2395 |
1.72395 |
3.4479 |
5.17185 |
6.8958 |
8.61975 |
|
2800 |
17.878 |
1.7878 |
3.5756 |
5.3634 |
7.1512 |
8.939 |
|
2900 |
18.5165 |
1.85165 |
3.7033 |
5.55495 |
7.4066 |
9.25825 |
|
3000 |
19.155 |
1.9155 |
3.831 |
5.7465 |
7.662 |
9.5775 |
|
3100 |
19.7935 |
1.97935 |
3.9587 |
5.93805 |
7.9174 |
9.89675 |
|
3200 |
20.432 |
2.0432 |
4.0864 |
6.1296 |
8.1728 |
10.216 |
|
3300 |
21.0705 |
2.10705 |
4.2141 |
6.32115 |
8.4282 |
10.53525 |
|
3400 |
21.709 |
2.1709 |
4.3418 |
6.5127 |
8.6836 |
10.8545 |
|
3500 |
22.3475 |
2.23475 |
4.4695 |
6.70425 |
8.939 |
11.17375 |
|
3600 |
22.986 |
2.2986 |
4.5972 |
6.8958 |
9.1944 |
11.493 |
|
3700 |
23.6245 |
2.36245 |
4.7249 |
7.08735 |
9.4498 |
11.81225 |
|
3800 |
24.263 |
2.4263 |
4.8526 |
7.2789 |
9.7052 |
12.1315 |
|
3900 |
24.9015 |
2.49015 |
4.9803 |
7.47045 |
9.9606 |
12.45075 |
|
4000 |
25.54 |
2.554 |
5.108 |
7.662 |
10.216 |
12.77 |
|
4100 |
26.1785 |
2.61785 |
5.2357 |
7.85355 |
10.4714 |
13.08925 |
|
4200 |
26.817 |
2.6817 |
5.3634 |
8.0451 |
10.7268 |
13.4085 |
|
4300 |
27.4555 |
2.74555 |
5.4911 |
8.23665 |
10.9822 |
13.72775 |
|
4400 |
28.094 |
2.8094 |
5.6188 |
8.4282 |
11.2376 |
14.047 |
|
4500 |
28.7325 |
2.87325 |
5.7465 |
8.61975 |
11.493 |
14.36625 |
|
4600 |
29.371 |
2.9371 |
5.8742 |
8.8113 |
11.7484 |
14.6855 |
|
4700 |
30.0095 |
3.00095 |
6.0019 |
9.00285 |
12.0038 |
15.00475 |
|
4800 |
30.648 |
3.0648 |
6.1296 |
9.1944 |
12.2592 |
15.324 |
|
4900 |
31.2865 |
3.12865 |
6.2573 |
9.38595 |
12.5146 |
15.64325 |
|
5000 |
31.925 |
3.1925 |
6.385 |
9.5775 |
12.77 |
15.9625 |
|
5100 |
32.5635 |
3.25635 |
6.5127 |
9.76905 |
13.0254 |
16.28175 |
|
5200 |
33.202 |
3.3202 |
6.6404 |
9.9606 |
13.2808 |
16.601 |
|
5300 |
33.8405 |
3.38405 |
6.7681 |
10.15215 |
13.5362 |
16.92025 |
|
5400 |
34.479 |
3.4479 |
6.8958 |
10.3437 |
13.7916 |
17.2395 |
|
5500 |
35.1175 |
3.51175 |
7.0235 |
10.53525 |
14.047 |
17.55875 |
|
5600 |
35.756 |
3.5756 |
7.1512 |
10.7268 |
14.3024 |
17.878 |
|
5700 |
36.3945 |
3.63945 |
7.2789 |
10.91835 |
14.5578 |
18.19725 |
|
5800 |
37.033 |
3.7033 |
7.4066 |
11.1099 |
14.8132 |
18.5165 |
|
5900 |
37.6715 |
3.76715 |
7.5343 |
11.30145 |
15.0686 |
18.83575 |
|
6000 |
38.31 |
3.831 |
7.662 |
11.493 |
15.324 |
19.155 |
|
6100 |
38.9485 |
3.89485 |
7.7897 |
11.68455 |
15.5794 |
19.47425 |
|
6200 |
39.587 |
3.9587 |
7.9174 |
11.8761 |
15.8348 |
19.7935 |
|
6300 |
40.2255 |
4.02255 |
8.0451 |
12.06765 |
16.0902 |
20.11275 |
|
6400 |
40.864 |
4.0864 |
8.1728 |
12.2592 |
16.3456 |
20.432 |
|
6500 |
41.5025 |
4.15025 |
8.3005 |
12.45075 |
16.601 |
20.75125 |
|
6600 |
42.141 |
4.2141 |
8.4282 |
12.6423 |
16.8564 |
21.0705 |
NAC Cabling
The XT+ Extinguishant Control Panel requires that NAC circuits include wire gauge and lengths specified in tables of this section. Shading of the tables identify cable length and load combinations that are not permitted for NAC devices.
Twin cables are connected to NAC terminals of the XT+ Extinguishant Control Panel. Data provided in the tables of this section represent resistance and voltage from a single cable-conductor. Resistance and voltage levels obtained from these tables must include the secondary conductor of the twin cable during the evaluation process.
Cable length values in the tables represent worst case conditions with the total load at the farthest point from terminals of the fire control panel. Voltage drops are represented with a depleted battery of 20.4V. Minimum output voltage is 20V. maximum allowable voltage drop is 4V to ensure a minimum of 16V at the device.
Tables are provided for the following recommended wire gauges:
|
12 AWG |
1.588 Ohms / 1000 ft |
|
14 AWG |
2.525 Ohms / 1000 ft |
|
16 AWG |
4.016 Ohms / 1000 ft |
12 AWG Cable
|
Length
|
Resistance Ω |
Voltage Drop | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| @ 0.25 A | @ 0.5 A | @ 0.75 A | @ 1.0 A | @ 1.25 A | @ 1.50 A | @ 1.75 A | @ 2.00 A | @ 2.25 A | @ 2.50 A | ||
|
25 |
0.0397 |
0.00992 |
0.01985 |
0.02977 |
0.0397 |
0.049625 |
0.05955 |
0.069475 |
0.0794 |
0.089325 |
0.09925 |
|
50 |
0.07964 |
0.01991 |
0.03982 |
0.05973 |
0.07964 |
0.09955 |
0.11946 |
0.13937 |
0.15928 |
0.17919 |
0.1991 |
|
100 |
0.15944 |
0.03986 |
0.07972 |
0.11958 |
0.15944 |
0.1993 |
0.23916 |
0.27902 |
0.31888 |
0.35874 |
0.3986 |
|
150 |
0.23924 |
0.05981 |
0.11962 |
0.17943 |
0.23924 |
0.29905 |
0.35886 |
0.41867 |
0.47848 |
0.53829 |
0.5981 |
|
200 |
0.31904 |
0.07976 |
0.15952 |
0.23928 |
0.31904 |
0.3988 |
0.47856 |
0.55832 |
0.63808 |
0.71784 |
0.7976 |
|
250 |
0.39884 |
0.09971 |
0.19942 |
0.29913 |
0.39884 |
0.49855 |
0.59826 |
0.69797 |
0.79768 |
0.89739 |
0.9971 |
|
300 |
0.47864 |
0.11966 |
0.23932 |
0.35898 |
0.47864 |
0.5983 |
0.71796 |
0.83762 |
0.95728 |
1.07694 |
1.1966 |
|
350 |
0.55844 |
0.13961 |
0.27922 |
0.41883 |
0.55844 |
0.69805 |
0.83766 |
0.97727 |
1.11688 |
1.25649 |
1.3961 |
|
400 |
0.63824 |
0.15956 |
0.31912 |
0.47868 |
0.63824 |
0.7978 |
0.95736 |
1.11692 |
1.27648 |
1.43604 |
1.5956 |
|
450 |
0.71804 |
0.17951 |
0.35902 |
0.53853 |
0.71804 |
0.89755 |
1.07706 |
1.25657 |
1.43608 |
1.61559 |
1.7951 |
|
500 |
0.79784 |
0.19946 |
0.39892 |
0.59838 |
0.79784 |
0.9973 |
1.19676 |
1.39622 |
1.59568 |
1.79514 |
1.9946 |
|
550 |
0.87764 |
0.21941 |
0.43882 |
0.65823 |
0.87764 |
1.09705 |
1.31646 |
1.53587 |
1.75528 |
1.97469 |
2.1941 |
|
600 |
0.95744 |
0.23936 |
0.47872 |
0.71808 |
0.95744 |
1.1968 |
1.43616 |
1.67552 |
1.91488 |
2.15424 |
2.3936 |
|
650 |
1.03724 |
0.25931 |
0.51862 |
0.77793 |
1.03724 |
1.29655 |
1.55586 |
1.81517 |
2.07448 |
2.33379 |
2.5931 |
|
700 |
1.11704 |
0.27926 |
0.55852 |
0.83778 |
1.11704 |
1.3963 |
1.67556 |
1.95482 |
2.23408 |
2.51334 |
2.7926 |
|
750 |
1.19684 |
0.29921 |
0.59842 |
0.89763 |
1.19684 |
1.49605 |
1.79526 |
2.09447 |
2.39368 |
2.69289 |
2.9921 |
|
800 |
1.27664 |
0.31916 |
0.63832 |
0.95748 |
1.27664 |
1.5958 |
1.91496 |
2.23412 |
2.55328 |
2.87244 |
3.1916 |
|
850 |
1.35644 |
0.33911 |
0.67822 |
1.01733 |
1.35644 |
1.69555 |
2.03466 |
2.37377 |
2.71288 |
3.05199 |
3.3911 |
|
900 |
1.43624 |
0.35906 |
0.71812 |
1.07718 |
1.43624 |
1.7953 |
2.15436 |
2.51342 |
2.87248 |
3.23154 |
3.5906 |
|
950 |
1.51604 |
0.37901 |
0.75802 |
1.13703 |
1.51604 |
1.89505 |
2.27406 |
2.65307 |
3.03208 |
3.41109 |
3.7901 |
|
1000 |
1.59584 |
0.39896 |
0.79792 |
1.19688 |
1.59584 |
1.9948 |
2.39376 |
2.79272 |
3.19168 |
3.59064 |
3.9896 |
|
1050 |
1.67564 |
0.41891 |
0.83782 |
1.25673 |
1.67564 |
2.09455 |
2.51346 |
2.93237 |
3.35128 |
3.77019 |
4.1891 |
|
1100 |
1.75544 |
0.43886 |
0.87772 |
1.31658 |
1.75544 |
2.1943 |
2.63316 |
3.07202 |
3.51088 |
3.94974 |
4.3886 |
|
1150 |
1.83524 |
0.45881 |
0.91762 |
1.37643 |
1.83524 |
2.29405 |
2.75286 |
3.21167 |
3.67048 |
4.12929 |
4.5881 |
|
1200 |
1.91504 |
0.47876 |
0.95752 |
1.43628 |
1.91504 |
2.3938 |
2.87256 |
3.35132 |
3.83008 |
4.30884 |
4.7876 |
|
1250 |
1.99484 |
0.49871 |
0.99742 |
1.49613 |
1.99484 |
2.49355 |
2.99226 |
3.49097 |
3.98968 |
4.48839 |
4.9871 |
|
1300 |
2.07464 |
0.51866 |
1.03732 |
1.55598 |
2.07464 |
2.5933 |
3.11196 |
3.63062 |
4.14928 |
4.66794 |
5.1866 |
|
1350 |
2.15444 |
0.53861 |
1.07722 |
1.61583 |
2.15444 |
2.69305 |
3.23166 |
3.77027 |
4.30888 |
4.84749 |
5.3861 |
|
1400 |
2.23424 |
0.55856 |
1.11712 |
1.67568 |
2.23424 |
2.7928 |
3.35136 |
3.90992 |
4.46848 |
5.02704 |
5.5856 |
|
1450 |
2.31404 |
0.57851 |
1.15702 |
1.73553 |
2.31404 |
2.89255 |
3.47106 |
4.04957 |
4.62808 |
5.20659 |
5.7851 |
|
1500 |
2.39384 |
0.59846 |
1.19692 |
1.79538 |
2.39384 |
2.9923 |
3.59076 |
4.18922 |
4.78768 |
5.38614 |
5.9846 |
|
1550 |
2.47364 |
0.61841 |
1.23682 |
1.85523 |
2.47364 |
3.09205 |
3.71046 |
4.32887 |
4.94728 |
5.56569 |
6.1841 |
|
1600 |
2.55344 |
0.63836 |
1.27672 |
1.91508 |
2.55344 |
3.1918 |
3.83016 |
4.46852 |
5.10688 |
5.74524 |
6.3836 |
|
1650 |
2.63324 |
0.65831 |
1.31662 |
1.97493 |
2.63324 |
3.29155 |
3.94986 |
4.60817 |
5.26648 |
5.92479 |
6.5831 |
14 AWG Cable
|
Length
|
Resistance
Ω |
Voltage Drop | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| @ 0.25 A | @ 0.5 A | @ 0.75 A | @ 1.0 A | @ 1.25 A | @ 1.50 A | @ 1.75 A | @ 2.00 A | @ 2.25 A | @ 2.50 A | ||
|
25 |
0.063125 |
0.01578125 |
0.0315625 |
0.04734375 |
0.063125 |
0.07890625 |
0.0946875 |
0.11046875 |
0.12625 |
0.14203125 |
0.1578125 |
|
50 |
0.12625 |
0.0315625 |
0.063125 |
0.0946875 |
0.12625 |
0.1578125 |
0.189375 |
0.2209375 |
0.2525 |
0.2840625 |
0.315665 |
|
100 |
0.2525 |
0.063125 |
0.12625 |
0.189375 |
0.2525 |
0.315625 |
0.37875 |
0.441875 |
0.505 |
0.568125 |
0.63134 |
|
150 |
0.37875 |
0.0946875 |
0.189375 |
0.2840625 |
0.37875 |
0.4734375 |
0.568125 |
0.6628125 |
0.7575 |
0.8521875 |
0.947015 |
|
200 |
0.505 |
0.12625 |
0.2525 |
0.37875 |
0.505 |
0.63125 |
0.7575 |
0.88375 |
1.01 |
1.13625 |
1.26269 |
|
250 |
0.63125 |
0.1578125 |
0.315625 |
0.4734375 |
0.63125 |
0.7890625 |
0.946875 |
1.1046875 |
1.2625 |
1.4203125 |
1.578365 |
|
300 |
0.7575 |
0.189375 |
0.37875 |
0.568125 |
0.7575 |
0.946875 |
1.13625 |
1.325625 |
1.515 |
1.704375 |
1.89404 |
|
350 |
0.88375 |
0.2209375 |
0.441875 |
0.6628125 |
0.88375 |
1.1046875 |
1.325625 |
1.5465625 |
1.7675 |
1.9884375 |
2.209715 |
|
400 |
1.01 |
0.2525 |
0.505 |
0.7575 |
1.01 |
1.2625 |
1.515 |
1.7675 |
2.02 |
2.2725 |
2.52539 |
|
450 |
1.13625 |
0.2840625 |
0.568125 |
0.8521875 |
1.13625 |
1.4203125 |
1.704375 |
1.9884375 |
2.2725 |
2.5565625 |
2.841065 |
|
500 |
1.2625 |
0.315625 |
0.63125 |
0.946875 |
1.2625 |
1.578125 |
1.89375 |
2.209375 |
2.525 |
2.840625 |
3.15674 |
|
550 |
1.38875 |
0.3471875 |
0.694375 |
1.0415625 |
1.38875 |
1.7359375 |
2.083125 |
2.4303125 |
2.7775 |
3.1246875 |
3.472415 |
|
600 |
1.515 |
0.37875 |
0.7575 |
1.13625 |
1.515 |
1.89375 |
2.2725 |
2.65125 |
3.03 |
3.40875 |
3.78809 |
|
650 |
1.64125 |
0.4103125 |
0.820625 |
1.2309375 |
1.64125 |
2.0515625 |
2.461875 |
2.8721875 |
3.2825 |
3.6928125 |
4.103765 |
|
700 |
1.7675 |
0.441875 |
0.88375 |
1.325625 |
1.7675 |
2.209375 |
2.65125 |
3.093125 |
3.535 |
3.976875 |
4.41944 |
|
750 |
1.89375 |
0.4734375 |
0.946875 |
1.4203125 |
1.89375 |
2.3671875 |
2.840625 |
3.3140625 |
3.7875 |
4.2609375 |
4.735115 |
|
800 |
2.02 |
0.505 |
1.01 |
1.515 |
2.02 |
2.525 |
3.03 |
3.535 |
4.04 |
4.545 |
5.05079 |
|
850 |
2.14625 |
0.5365625 |
1.073125 |
1.6096875 |
2.14625 |
2.6828125 |
3.219375 |
3.7559375 |
4.2925 |
4.8290625 |
5.366465 |
|
900 |
2.2725 |
0.568125 |
1.13625 |
1.704375 |
2.2725 |
2.840625 |
3.40875 |
3.976875 |
4.545 |
5.113125 |
5.68214 |
|
950 |
2.39875 |
0.5996875 |
1.199375 |
1.7990625 |
2.39875 |
2.9984375 |
3.598125 |
4.1978125 |
4.7975 |
5.3971875 |
5.997815 |
|
1000 |
2.525 |
0.63125 |
1.2625 |
1.89375 |
2.525 |
3.15625 |
3.7875 |
4.41875 |
5.05 |
5.68125 |
6.31349 |
|
1050 |
2.65125 |
0.6628125 |
1.325625 |
1.9884375 |
2.65125 |
3.3140625 |
3.976875 |
4.6396875 |
5.3025 |
5.9653125 |
6.629165 |
|
1100 |
2.7775 |
0.694375 |
1.38875 |
2.083125 |
2.7775 |
3.471875 |
4.16625 |
4.860625 |
5.555 |
6.249375 |
6.94484 |
|
1150 |
2.90375 |
0.7259375 |
1.451875 |
2.1778125 |
2.90375 |
3.6296875 |
4.355625 |
5.0815625 |
5.8075 |
6.5334375 |
7.260515 |
|
1200 |
3.03 |
0.7575 |
1.515 |
2.2725 |
3.03 |
3.7875 |
4.545 |
5.3025 |
6.06 |
6.8175 |
7.57619 |
|
1250 |
3.15625 |
0.7890625 |
1.578125 |
2.3671875 |
3.15625 |
3.9453125 |
4.734375 |
5.5234375 |
6.3125 |
7.1015625 |
7.891865 |
|
1300 |
3.2825 |
0.820625 |
1.64125 |
2.461875 |
3.2825 |
4.103125 |
4.92375 |
5.744375 |
6.565 |
7.385625 |
8.20754 |
|
1350 |
3.40875 |
0.8521875 |
1.704375 |
2.5565625 |
3.40875 |
4.2609375 |
5.113125 |
5.9653125 |
6.8175 |
7.6696875 |
8.523215 |
|
1400 |
3.535 |
0.88375 |
1.7675 |
2.65125 |
3.535 |
4.41875 |
5.3025 |
6.18625 |
7.07 |
7.95375 |
8.83889 |
|
1450 |
3.66125 |
0.9153125 |
1.830625 |
2.7459375 |
3.66125 |
4.5765625 |
5.491875 |
6.4071875 |
7.3225 |
8.2378125 |
9.154565 |
|
1500 |
3.7875 |
0.946875 |
1.89375 |
2.840625 |
3.7875 |
4.734375 |
5.68125 |
6.628125 |
7.575 |
8.521875 |
9.47024 |
|
1550 |
3.91375 |
0.9784375 |
1.956875 |
2.9353125 |
3.91375 |
4.8921875 |
5.870625 |
6.8490625 |
7.8275 |
8.8059375 |
9.785915 |
|
1600 |
4.04 |
1.01 |
2.02 |
3.03 |
4.04 |
5.05 |
6.06 |
7.07 |
8.08 |
9.09 |
10.10159 |
|
1650 |
4.16625 |
1.0415625 |
2.083125 |
3.1246875 |
4.16625 |
5.2078125 |
6.249375 |
7.2909375 |
8.3325 |
9.3740625 |
10.417265 |
16 AWG Cable
|
Length
|
Resistance Ω |
Voltage Drop | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| @ 0.25 A | @ 0.5 A | @ 0.75 A | @ 1.0 A | @ 1.25 A | @ 1.50 A | @ 1.75 A | @ 2.00 A | @ 2.25 A | @ 2.50 A | ||
|
25 |
0.1004 |
0.0251 |
0.0502 |
0.0753 |
0.1004 |
0.1255 |
0.1506 |
0.1757 |
0.2008 |
0.2259 |
0.251 |
|
50 |
0.2008 |
0.0502 |
0.1004 |
0.1506 |
0.2008 |
0.251 |
0.3012 |
0.3514 |
0.4016 |
0.4518 |
0.502 |
|
100 |
0.4016 |
0.1004 |
0.2008 |
0.3012 |
0.4016 |
0.502 |
0.6024 |
0.7028 |
0.8032 |
0.9036 |
1.004 |
|
150 |
0.6024 |
0.1506 |
0.3012 |
0.4518 |
0.6024 |
0.753 |
0.9036 |
1.0542 |
1.2048 |
1.3554 |
1.506 |
|
200 |
0.8032 |
0.2008 |
0.4016 |
0.6024 |
0.8032 |
1.004 |
1.2048 |
1.4056 |
1.6064 |
1.8072 |
2.008 |
|
250 |
1.004 |
0.251 |
0.502 |
0.753 |
1.004 |
1.255 |
1.506 |
1.757 |
2.008 |
2.259 |
2.51 |
|
300 |
1.2048 |
0.3012 |
0.6024 |
0.9036 |
1.2048 |
1.506 |
1.8072 |
2.1084 |
2.4096 |
2.7108 |
3.012 |
|
350 |
1.4056 |
0.3514 |
0.7028 |
1.0542 |
1.4056 |
1.757 |
2.1084 |
2.4598 |
2.8112 |
3.1626 |
3.514 |
|
400 |
1.6064 |
0.4016 |
0.8032 |
1.2048 |
1.6064 |
2.008 |
2.4096 |
2.8112 |
3.2128 |
3.6144 |
4.016 |
|
450 |
1.8072 |
0.4518 |
0.9036 |
1.3554 |
1.8072 |
2.259 |
2.7108 |
3.1626 |
3.6144 |
4.0662 |
4.518 |
|
500 |
2.008 |
0.502 |
1.004 |
1.506 |
2.008 |
2.51 |
3.012 |
3.514 |
4.016 |
4.518 |
5.02 |
|
550 |
2.2088 |
0.5522 |
1.1044 |
1.6566 |
2.2088 |
2.761 |
3.3132 |
3.8654 |
4.4176 |
4.9698 |
5.522 |
|
600 |
2.4096 |
0.6024 |
1.2048 |
1.8072 |
2.4096 |
3.012 |
3.6144 |
4.2168 |
4.8192 |
5.4216 |
6.024 |
|
650 |
2.6104 |
0.6526 |
1.3052 |
1.9578 |
2.6104 |
3.263 |
3.9156 |
4.5682 |
5.2208 |
5.8734 |
6.526 |
|
700 |
2.8112 |
0.7028 |
1.4056 |
2.1084 |
2.8112 |
3.514 |
4.2168 |
4.9196 |
5.6224 |
6.3252 |
7.028 |
|
750 |
3.012 |
0.753 |
1.506 |
2.259 |
3.012 |
3.765 |
4.518 |
5.271 |
6.024 |
6.777 |
7.53 |
|
800 |
3.2128 |
0.8032 |
1.6064 |
2.4096 |
3.2128 |
4.016 |
4.8192 |
5.6224 |
6.4256 |
7.2288 |
8.032 |
|
850 |
3.4136 |
0.8534 |
1.7068 |
2.5602 |
3.4136 |
4.267 |
5.1204 |
5.9738 |
6.8272 |
7.6806 |
8.534 |
|
900 |
3.6144 |
0.9036 |
1.8072 |
2.7108 |
3.6144 |
4.518 |
5.4216 |
6.3252 |
7.2288 |
8.1324 |
9.036 |
|
950 |
3.8152 |
0.9538 |
1.9076 |
2.8614 |
3.8152 |
4.769 |
5.7228 |
6.6766 |
7.6304 |
8.5842 |
9.538 |
|
1000 |
4.016 |
1.004 |
2.008 |
3.012 |
4.016 |
5.02 |
6.024 |
7.028 |
8.032 |
9.036 |
10.04 |
|
1050 |
4.2168 |
1.0542 |
2.1084 |
3.1626 |
4.2168 |
5.271 |
6.3252 |
7.3794 |
8.4336 |
9.4878 |
10.542 |
|
1100 |
4.4176 |
1.1044 |
2.2088 |
3.3132 |
4.4176 |
5.522 |
6.6264 |
7.7308 |
8.8352 |
9.9396 |
11.044 |
|
1150 |
4.6184 |
1.1546 |
2.3092 |
3.4638 |
4.6184 |
5.773 |
6.9276 |
8.0822 |
9.2368 |
10.3914 |
11.546 |
|
1200 |
4.8192 |
1.2048 |
2.4096 |
3.6144 |
4.8192 |
6.024 |
7.2288 |
8.4336 |
9.6384 |
10.8432 |
12.048 |
|
1250 |
5.02 |
1.255 |
2.51 |
3.765 |
5.02 |
6.275 |
7.53 |
8.785 |
10.04 |
11.295 |
12.55 |
|
1300 |
5.2208 |
1.3052 |
2.6104 |
3.9156 |
5.2208 |
6.526 |
7.8312 |
9.1364 |
10.4416 |
11.7468 |
13.052 |
|
1350 |
5.4216 |
1.3554 |
2.7108 |
4.0662 |
5.4216 |
6.777 |
8.1324 |
9.4878 |
10.8432 |
12.1986 |
13.554 |
|
1400 |
5.6224 |
1.4056 |
2.8112 |
4.2168 |
5.6224 |
7.028 |
8.4336 |
9.8392 |
11.2448 |
12.6504 |
14.056 |
|
1450 |
5.8232 |
1.4558 |
2.9116 |
4.3674 |
5.8232 |
7.279 |
8.7348 |
10.1906 |
11.6464 |
13.1022 |
14.558 |
|
1500 |
6.024 |
1.506 |
3.012 |
4.518 |
6.024 |
7.53 |
9.036 |
10.542 |
12.048 |
13.554 |
15.06 |
|
1550 |
6.2248 |
1.5562 |
3.1124 |
4.6686 |
6.2248 |
7.781 |
9.3372 |
10.8934 |
12.4496 |
14.0058 |
15.562 |
|
1600 |
6.4256 |
1.6064 |
3.2128 |
4.8192 |
6.4256 |
8.032 |
9.6384 |
11.2448 |
12.8512 |
14.4576 |
16.064 |
|
1650 |
6.6264 |
1.6566 |
3.3132 |
4.9698 |
6.6264 |
8.283 |
9.9396 |
11.5962 |
13.2528 |
14.9094 |
16.566 |
AUX 24V Cabling
The XT+ Extinguishant Control Panel requires that AUX 24V circuits include wire gauge and lengths specified in tables of this section.
Twin cables are connected to AUX 24V terminals of the XT+ Extinguishant Control Panel. Data provided in AUX 24V tables of this section represent resistance and voltage from a single cable-conductor. Resistance and voltage levels obtained from these tables must include the secondary conductor of the twin cable during the evaluation process.
Cable length values in the tables represent worst case conditions with the total load at the farthest point from terminals of the fire control panel.
AUX 24V tables are provided for the following recommended wire gauges:
|
12 AWG |
1.588 Ohms / 1000 ft |
|
14 AWG |
2.525 Ohms / 1000 ft |
|
16 AWG |
4.016 Ohms / 1000 ft |
12 AWG Cable
|
Length |
Resistance |
Voltage Drop | |||
|---|---|---|---|---|---|
| @ 0.1 A | @ 0.2 A | @ 0.3 A | @ 0.4 A | ||
|
100 |
0.15944 |
0.015944 |
0.031888 |
0.047832 |
0.063776 |
|
200 |
0.31904 |
0.031952 |
0.063808 |
0.095712 |
0.127616 |
|
300 |
0.47864 |
0.04796 |
0.095728 |
0.143592 |
0.191456 |
|
400 |
0.63824 |
0.063968 |
0.127648 |
0.191472 |
0.255296 |
|
500 |
0.79784 |
0.079976 |
0.159568 |
0.239352 |
0.319136 |
|
600 |
0.95744 |
0.095984 |
0.191488 |
0.287232 |
0.382976 |
|
700 |
1.11704 |
0.111992 |
0.223408 |
0.335112 |
0.446816 |
|
800 |
1.27664 |
0.128 |
0.255328 |
0.382992 |
0.510656 |
|
900 |
1.43624 |
0.144008 |
0.287248 |
0.430872 |
0.574496 |
|
1000 |
1.59584 |
0.160016 |
0.319168 |
0.478752 |
0.638336 |
|
1100 |
1.75544 |
0.176024 |
0.351088 |
0.526632 |
0.702176 |
|
1200 |
1.91504 |
0.192032 |
0.383008 |
0.574512 |
0.766016 |
|
1300 |
2.07464 |
0.20804 |
0.414928 |
0.622392 |
0.829856 |
|
1400 |
2.23424 |
0.224048 |
0.446848 |
0.670272 |
0.893696 |
|
1500 |
2.39384 |
0.240056 |
0.478768 |
0.718152 |
0.957536 |
|
1600 |
2.55344 |
0.256064 |
0.510688 |
0.766032 |
1.021376 |
|
1700 |
2.71304 |
0.272072 |
0.542608 |
0.813912 |
1.085216 |
|
1800 |
2.87264 |
0.28808 |
0.574528 |
0.861792 |
1.149056 |
|
1900 |
3.03224 |
0.304088 |
0.606448 |
0.909672 |
1.212896 |
|
2000 |
3.19184 |
0.320096 |
0.638368 |
0.957552 |
1.276736 |
|
2100 |
3.35144 |
0.336104 |
0.670288 |
1.005432 |
1.340576 |
|
2200 |
3.51104 |
0.352112 |
0.702208 |
1.053312 |
1.404416 |
|
2300 |
3.67064 |
0.36812 |
0.734128 |
1.101192 |
1.468256 |
|
2400 |
3.83024 |
0.384128 |
0.766048 |
1.149072 |
1.532096 |
|
2500 |
3.98984 |
0.400136 |
0.797968 |
1.196952 |
1.595936 |
|
2600 |
4.14944 |
0.416144 |
0.829888 |
1.244832 |
1.659776 |
|
2700 |
4.30904 |
0.432152 |
0.861808 |
1.292712 |
1.723616 |
|
2800 |
4.46864 |
0.44816 |
0.893728 |
1.340592 |
1.787456 |
|
2900 |
4.62824 |
0.464168 |
0.925648 |
1.388472 |
1.851296 |
|
3000 |
4.78784 |
0.480176 |
0.957568 |
1.436352 |
1.915136 |
|
3100 |
4.94744 |
0.496184 |
0.989488 |
1.484232 |
1.978976 |
|
3200 |
5.10704 |
0.512192 |
1.021408 |
1.532112 |
2.042816 |
|
3300 |
5.26664 |
0.5282 |
1.053328 |
1.579992 |
2.106656 |
|
3400 |
5.42624 |
0.544208 |
1.085248 |
1.627872 |
2.170496 |
|
3500 |
5.58584 |
0.560216 |
1.117168 |
1.675752 |
2.234336 |
|
3600 |
5.74544 |
0.576224 |
1.149088 |
1.723632 |
2.298176 |
|
3700 |
5.90504 |
0.592232 |
1.181008 |
1.771512 |
2.362016 |
|
3800 |
6.06464 |
0.60824 |
1.212928 |
1.819392 |
2.425856 |
|
3900 |
6.22424 |
0.624248 |
1.244848 |
1.867272 |
2.489696 |
|
4000 |
6.38384 |
0.640256 |
1.276768 |
1.915152 |
2.553536 |
|
4100 |
6.54344 |
0.656264 |
1.308688 |
1.963032 |
2.617376 |
|
4200 |
6.70304 |
0.672272 |
1.340608 |
2.010912 |
2.681216 |
|
4300 |
6.86264 |
0.68828 |
1.372528 |
2.058792 |
2.745056 |
|
4400 |
7.02224 |
0.704288 |
1.404448 |
2.106672 |
2.808896 |
|
4500 |
7.18184 |
0.720296 |
1.436368 |
2.154552 |
2.872736 |
|
4600 |
7.34144 |
0.736304 |
1.468288 |
2.202432 |
2.936576 |
|
4700 |
7.50104 |
0.752312 |
1.500208 |
2.250312 |
3.000416 |
|
4800 |
7.66064 |
0.76832 |
1.532128 |
2.298192 |
3.064256 |
|
4900 |
7.82024 |
0.784328 |
1.564048 |
2.346072 |
3.128096 |
|
5000 |
7.97984 |
0.800336 |
1.595968 |
2.393952 |
3.191936 |
|
5100 |
8.13944 |
0.816344 |
1.627888 |
2.441832 |
3.255776 |
|
5200 |
8.29904 |
0.832352 |
1.659808 |
2.489712 |
3.319616 |
|
5300 |
8.45864 |
0.84836 |
1.691728 |
2.537592 |
3.383456 |
|
5400 |
8.61824 |
0.864368 |
1.723648 |
2.585472 |
3.447296 |
|
5500 |
8.77784 |
0.880376 |
1.755568 |
2.633352 |
3.511136 |
|
5600 |
8.93744 |
0.896384 |
1.787488 |
2.681232 |
3.574976 |
|
5700 |
9.09704 |
0.912392 |
1.819408 |
2.729112 |
3.638816 |
|
5800 |
9.25664 |
0.9284 |
1.851328 |
2.776992 |
3.702656 |
|
5900 |
9.41624 |
0.944408 |
1.883248 |
2.824872 |
3.766496 |
|
6000 |
9.57584 |
0.960416 |
1.915168 |
2.872752 |
3.830336 |
|
6100 |
9.73544 |
0.976424 |
1.947088 |
2.920632 |
3.894176 |
|
6200 |
9.89504 |
0.992432 |
1.979008 |
2.968512 |
3.958016 |
|
6300 |
10.05464 |
1.00844 |
2.010928 |
3.016392 |
4.021856 |
|
6400 |
10.21424 |
1.024448 |
2.042848 |
3.064272 |
4.085696 |
|
6500 |
10.37384 |
1.040456 |
2.074768 |
3.112152 |
4.149536 |
|
6600 |
10.53344 |
1.056464 |
2.106688 |
3.160032 |
4.213376 |
14 AWG Cable
|
Length |
Resistance |
Voltage Drop | |||
|---|---|---|---|---|---|
| @ 0.1 A | @ 0.2 A | @ 0.3 A | @ 0.4 A | ||
|
100 |
0.2525 |
0.02525 |
0.0505 |
0.07575 |
0.101 |
|
200 |
0.505 |
0.0505 |
0.101 |
0.1515 |
0.202 |
|
300 |
0.7575 |
0.07575 |
0.1515 |
0.22725 |
0.303 |
|
400 |
1.01 |
0.101 |
0.202 |
0.303 |
0.404 |
|
500 |
1.2625 |
0.12625 |
0.2525 |
0.37875 |
0.505 |
|
600 |
1.515 |
0.1515 |
0.303 |
0.4545 |
0.606 |
|
700 |
1.7675 |
0.17675 |
0.3535 |
0.53025 |
0.707 |
|
800 |
2.02 |
0.202 |
0.404 |
0.606 |
0.808 |
|
900 |
2.2725 |
0.22725 |
0.4545 |
0.68175 |
0.909 |
|
1000 |
2.525 |
0.2525 |
0.505 |
0.7575 |
1.01 |
|
1100 |
2.7775 |
0.27775 |
0.5555 |
0.83325 |
1.111 |
|
1200 |
3.03 |
0.303 |
0.606 |
0.909 |
1.212 |
|
1300 |
3.2825 |
0.32825 |
0.6565 |
0.98475 |
1.313 |
|
1400 |
3.535 |
0.3535 |
0.707 |
1.0605 |
1.414 |
|
1500 |
3.7875 |
0.37875 |
0.7575 |
1.13625 |
1.515 |
|
1600 |
4.04 |
0.404 |
0.808 |
1.212 |
1.616 |
|
1700 |
4.2925 |
0.42925 |
0.8585 |
1.28775 |
1.717 |
|
1800 |
4.545 |
0.4545 |
0.909 |
1.3635 |
1.818 |
|
1900 |
4.7975 |
0.47975 |
0.9595 |
1.43925 |
1.919 |
|
2000 |
5.05 |
0.505 |
1.01 |
1.515 |
2.02 |
|
2100 |
5.3025 |
0.53025 |
1.0605 |
1.59075 |
2.121 |
|
2200 |
5.555 |
0.5555 |
1.111 |
1.6665 |
2.222 |
|
2300 |
5.8075 |
0.58075 |
1.1615 |
1.74225 |
2.323 |
|
2400 |
6.06 |
0.606 |
1.212 |
1.818 |
2.424 |
|
2500 |
6.3125 |
0.63125 |
1.2625 |
1.89375 |
2.525 |
|
2600 |
6.565 |
0.6565 |
1.313 |
1.9695 |
2.626 |
|
2700 |
6.8175 |
0.68175 |
1.3635 |
2.04525 |
2.727 |
|
2800 |
7.07 |
0.707 |
1.414 |
2.121 |
2.828 |
|
2900 |
7.3225 |
0.73225 |
1.4645 |
2.19675 |
2.929 |
|
3000 |
7.575 |
0.7575 |
1.515 |
2.2725 |
3.03 |
|
3100 |
7.8275 |
0.78275 |
1.5655 |
2.34825 |
3.131 |
|
3200 |
8.08 |
0.808 |
1.616 |
2.424 |
3.232 |
|
3300 |
8.3325 |
0.83325 |
1.6665 |
2.49975 |
3.333 |
|
3400 |
8.585 |
0.8585 |
1.717 |
2.5755 |
3.434 |
|
3500 |
8.8375 |
0.88375 |
1.7675 |
2.65125 |
3.535 |
|
3600 |
9.09 |
0.909 |
1.818 |
2.727 |
3.636 |
|
3700 |
9.3425 |
0.93425 |
1.8685 |
2.80275 |
3.737 |
|
3800 |
9.595 |
0.9595 |
1.919 |
2.8785 |
3.838 |
|
3900 |
9.8475 |
0.98475 |
1.9695 |
2.95425 |
3.939 |
|
4000 |
10.1 |
1.01 |
2.02 |
3.03 |
4.04 |
|
4100 |
10.3525 |
1.03525 |
2.0705 |
3.10575 |
4.141 |
|
4200 |
10.605 |
1.0605 |
2.121 |
3.1815 |
4.242 |
|
4300 |
10.8575 |
1.08575 |
2.1715 |
3.25725 |
4.343 |
|
4400 |
11.11 |
1.111 |
2.222 |
3.333 |
4.444 |
|
4500 |
11.3625 |
1.13625 |
2.2725 |
3.40875 |
4.545 |
|
4600 |
11.615 |
1.1615 |
2.323 |
3.4845 |
4.646 |
|
4700 |
11.8675 |
1.18675 |
2.3735 |
3.56025 |
4.747 |
|
4800 |
12.12 |
1.212 |
2.424 |
3.636 |
4.848 |
|
4900 |
12.3725 |
1.23725 |
2.4745 |
3.71175 |
4.949 |
|
5000 |
12.625 |
1.2625 |
2.525 |
3.7875 |
5.05 |
|
5100 |
12.8775 |
1.28775 |
2.5755 |
3.86325 |
5.151 |
|
5200 |
13.13 |
1.313 |
2.626 |
3.939 |
42 |
|
5300 |
13.3825 |
1.33825 |
2.6765 |
4.01475 |
5.353 |
|
5400 |
13.635 |
1.3635 |
2.727 |
4.0905 |
5.454 |
|
5500 |
13.8875 |
1.38875 |
2.7775 |
4.16625 |
5.555 |
|
5600 |
14.14 |
1.414 |
2.828 |
4.242 |
5.656 |
|
5700 |
14.3925 |
1.43925 |
2.8785 |
4.31775 |
5.757 |
|
5800 |
14.645 |
1.4645 |
2.929 |
4.3935 |
5.858 |
|
5900 |
14.8975 |
1.48975 |
2.9795 |
4.46925 |
5.959 |
|
6000 |
15.15 |
1.515 |
3.03 |
4.545 |
6.06 |
|
6100 |
15.4025 |
1.54025 |
3.0805 |
4.62075 |
6.161 |
|
6200 |
15.655 |
1.5655 |
3.131 |
4.6965 |
6.262 |
|
6300 |
15.9075 |
1.59075 |
3.1815 |
4.77225 |
6.363 |
|
6400 |
16.16 |
1.616 |
3.232 |
4.848 |
6.464 |
|
6500 |
16.4125 |
1.64125 |
3.2825 |
4.92375 |
6.565 |
|
6600 |
16.665 |
1.6665 |
3.333 |
4.9995 |
6.666 |
16 AWG Cable
|
Length |
Resistance |
Voltage Drop | |||
|---|---|---|---|---|---|
| @ 0.1 A | @ 0.2 A | @ 0.3 A | @ 0.4 A | ||
|
100 |
0.4016 |
0.04016 |
0.08032 |
0.12048 |
0.16064 |
|
200 |
0.8032 |
0.08032 |
0.16064 |
0.24096 |
0.32128 |
|
300 |
1.2048 |
0.12048 |
0.24096 |
0.36144 |
0.48192 |
|
400 |
1.6064 |
0.16064 |
0.32128 |
0.48192 |
0.64256 |
|
500 |
2.008 |
0.2008 |
0.4016 |
0.6024 |
0.8032 |
|
600 |
2.4096 |
0.24096 |
0.48192 |
0.72288 |
0.96384 |
|
700 |
2.8112 |
0.28112 |
0.56224 |
0.84336 |
1.12448 |
|
800 |
3.2128 |
0.32128 |
0.64256 |
0.96384 |
1.28512 |
|
900 |
3.6144 |
0.36144 |
0.72288 |
1.08432 |
1.44576 |
|
1000 |
4.016 |
0.4016 |
0.8032 |
1.2048 |
1.6064 |
|
1100 |
4.4176 |
0.44176 |
0.88352 |
1.32528 |
1.76704 |
|
1200 |
4.8192 |
0.48192 |
0.96384 |
1.44576 |
1.92768 |
|
1300 |
5.2208 |
0.52208 |
1.04416 |
1.56624 |
2.08832 |
|
1400 |
5.6224 |
0.56224 |
1.12448 |
1.68672 |
2.24896 |
|
1500 |
6.024 |
0.6024 |
1.2048 |
1.8072 |
2.4096 |
|
1600 |
6.4256 |
0.64256 |
1.28512 |
1.92768 |
2.57024 |
|
1700 |
6.8272 |
0.68272 |
1.36544 |
2.04816 |
2.73088 |
|
1800 |
7.2288 |
0.72288 |
1.44576 |
2.16864 |
2.89152 |
|
1900 |
7.6304 |
0.76304 |
1.52608 |
2.28912 |
3.05216 |
|
2000 |
8.032 |
0.8032 |
1.6064 |
2.4096 |
3.2128 |
|
2100 |
8.4336 |
0.84336 |
1.68672 |
2.53008 |
3.37344 |
|
2200 |
8.8352 |
0.88352 |
1.76704 |
2.65056 |
3.53408 |
|
2300 |
9.2368 |
0.92368 |
1.84736 |
2.77104 |
3.69472 |
|
2400 |
9.6384 |
0.96384 |
1.92768 |
2.89152 |
3.85536 |
|
2500 |
10.04 |
1.004 |
2.008 |
3.012 |
4.016 |
|
2600 |
10.4416 |
1.04416 |
2.08832 |
3.13248 |
4.17664 |
|
2700 |
10.8432 |
1.08432 |
2.16864 |
3.25296 |
4.33728 |
|
2800 |
11.2448 |
1.12448 |
2.24896 |
3.37344 |
4.49792 |
|
2900 |
11.6464 |
1.16464 |
2.32928 |
3.49392 |
4.65856 |
|
3000 |
12.048 |
1.2048 |
2.4096 |
3.6144 |
4.8192 |
|
3100 |
12.4496 |
1.24496 |
2.48992 |
3.73488 |
4.97984 |
|
3200 |
12.8512 |
1.28512 |
2.57024 |
3.85536 |
5.14048 |
|
3300 |
13.2528 |
1.32528 |
2.65056 |
3.97584 |
5.30112 |
|
3400 |
13.6544 |
1.36544 |
2.73088 |
4.09632 |
5.46176 |
|
3500 |
14.056 |
1.4056 |
2.8112 |
4.2168 |
5.6224 |
|
3600 |
14.4576 |
1.44576 |
2.89152 |
4.33728 |
5.78304 |
|
3700 |
14.8592 |
1.48592 |
2.97184 |
4.45776 |
5.94368 |
|
3800 |
15.2608 |
1.52608 |
3.05216 |
4.57824 |
6.10432 |
|
3900 |
15.6624 |
1.56624 |
3.13248 |
4.69872 |
6.26496 |
|
4000 |
16.064 |
1.6064 |
3.2128 |
4.8192 |
6.4256 |
|
4100 |
16.4656 |
1.64656 |
3.29312 |
4.93968 |
6.58624 |
|
4200 |
16.8672 |
1.68672 |
3.37344 |
5.06016 |
6.74688 |
|
4300 |
17.2688 |
1.72688 |
3.45376 |
5.18064 |
6.90752 |
|
4400 |
17.6704 |
1.76704 |
3.53408 |
5.30112 |
7.06816 |
|
4500 |
18.072 |
1.8072 |
3.6144 |
5.4216 |
7.2288 |
|
4600 |
18.4736 |
1.84736 |
3.69472 |
5.54208 |
7.38944 |
|
4700 |
18.8752 |
1.88752 |
3.77504 |
5.66256 |
7.55008 |
|
4800 |
19.2768 |
1.92768 |
3.85536 |
5.78304 |
7.71072 |
|
4900 |
19.6784 |
1.96784 |
3.93568 |
5.90352 |
7.87136 |
|
5000 |
20.08 |
2.008 |
4.016 |
6.024 |
8.032 |
|
5100 |
20.4816 |
2.04816 |
4.09632 |
6.14448 |
8.19264 |
|
5200 |
20.8832 |
2.08832 |
4.17664 |
6.26496 |
8.35328 |
|
5300 |
21.2848 |
2.12848 |
4.25696 |
6.38544 |
8.51392 |
|
5400 |
21.6864 |
2.16864 |
4.33728 |
6.50592 |
8.67456 |
|
5500 |
22.088 |
2.2088 |
4.4176 |
6.6264 |
8.8352 |
|
5600 |
22.4896 |
2.24896 |
4.49792 |
6.74688 |
8.99584 |
|
5700 |
22.8912 |
2.28912 |
4.57824 |
6.86736 |
9.15648 |
|
5800 |
23.2928 |
2.32928 |
4.65856 |
6.98784 |
9.31712 |
|
5900 |
23.6944 |
2.36944 |
4.73888 |
7.10832 |
9.47776 |
|
6000 |
24.096 |
2.4096 |
4.8192 |
7.2288 |
9.6384 |
|
6100 |
24.4976 |
2.44976 |
4.89952 |
7.34928 |
9.79904 |
|
6200 |
24.8992 |
2.48992 |
4.97984 |
7.46976 |
9.95968 |
|
6300 |
25.3008 |
2.53008 |
5.06016 |
7.59024 |
10.12032 |
|
6400 |
25.7024 |
2.57024 |
5.14048 |
7.71072 |
10.28096 |
|
6500 |
26.104 |
2.6104 |
5.2208 |
7.8312 |
10.4416 |
|
6600 |
26.5056 |
2.65056 |
5.30112 |
7.95168 |
10.60224 |
Determining the Total Load Current
The following example demonstrates the process for determining the total load current of the XT+ Extinguishant Control Panel:
- Identify the current draw of each device on the circuit connection.
- Add the device currents together in each circuit connection.
- Compare the sum of the device currents with the current limit of each circuit connection to verify that the summed level is below the current limit value.
- Add the device load currents together that were obtained for each of the circuit connections:
| Circuit Connection | Maximum Current Limit | Example Load Current |
|---|---|---|
| SLC Loop 1 | 400 mA | 150 mA |
| SLC Loop 2 | 400 mA | 50 mA |
| AUX 24V | 900 mA | 0 |
| NAC 1 | 2.5 A | 750 mA continuous DC |
| NAC 2 | 2.5 A | 925 mA continuous DC |
| Total Device Load | 1.875 A | |
- Add the Total Device Load to the no-load alarm current to obtain the Total Load Current.
- Total Device Load + XT+ Extinguishant Control Panel No-Load = Total Load Current
1.875 + 200 mA = 2.075 A
Total Load Current = 2.075 A
- Verify that the current level is below 4 Amps: 2.075 A < 4 A
- This example demonstrates that device loading does not exceed the 4 Amp capacity of the power supply.
1.25 A of the 5.25 A power supply is reserved for battery charging.
Refer to Specifications for the maximum current limits provided in the example calculation above.
Determining the Standby Battery Capacity
This section provides guidelines for determining the standby battery rating. For power supply applications that do not include fire alarm equipment, alarm current is the dynamic current present during operation of the power supply. Standby current is the static current present when the power supply is not operating an alarm.
Battery Rating Equation
The equation below describes the method for determining the amp hour rating of the standby batteries:
Battery Rating = ( Battery De-Rating Factor ) x [ ( Standby amp hours ) + ( Alarm amp hours )]
OR
Battery Rating = ( Battery De-Rating Factor ) x [ ( 24 hours x Standby-Current ) + ( 5 Minutes x Alarm Current)]
where the battery de-rating factor = 1.2 and 5 minutes = 5 / 60 minutes = 1/12 = .0833 hours
To determine the amp hour rating of standby batteries:
- Record the standby current of the power supply.
- Record the standby current of the fire control panel. This current includes the LCD Main Processor Board, the Main Back Board, System A Panel Module, and System B Panel Module. It does not include current of the power supply and circuit boards in Slots C through F.
- Record the standby current of circuit boards populating Slots C through F.
- Record the standby current of SLC, NAC, and auxiliary devices.
- Total standby currents.
- Record the alarm current of the power supply.
- Record the alarm current of the fire control panel. This current includes the LCD Main Processor Board, the Main Back Board, System A Panel Module, and System B Panel Module. It does not include current of the power supply and circuit boards in slots C through F.
- Record the alarm current of circuit boards populating slots C through F of the panel.
- Record the alarm current of SLC, NAC, and auxiliary devices.
- Total alarm currents.
- Multiply the total standby current with the standby-time of 24, 48, or 72 hours to provide the result in amp hours.
- Multiply the total alarm current with the alarm time 5 or 15 minutes to provide the result in amp hours.
- Combine the sum of amp hours for total standby and alarm.
- Determine the minimum required amp hour capacity of the standby battery by multiplying the combined Amp hours with the 1.2 de-rating factor.
- Select a battery with a capacity rating equal or greater than the minimum required amp hour capacity determined from this calculation.
Amp Hour Rating
Complete the worksheet below to tabulate the total current load and to determine the minimum required amp hour rating of the standby batteries. Select a corresponding standby battery based on these calculations:
|
|
Category |
Instruction |
Standby Current |
Alarm Current |
|---|---|---|---|---|
|
1 |
Power Supply Standby Current | Current of the power supply with AC input failure. |
80 mA |
|
|
2 |
Fire Control Panel Standby Current |
Current of the fire control panel with AC input failure. |
Amps |
|
|
3 |
Panel Module Standby Current | Current from panel modules in slots C through F with Standby and AC input failure. |
Amps |
|
|
4 |
External Device Standby Current |
Current of SLC, NAC, and auxiliary devices with Standby and AC input failure. |
Amps
|
|
|
5 |
Total Standby Current |
Total all standby currents. |
Amps |
|
|
6 |
Power Supply Alarm Current | Current of the power supply with Alarm and AC input failure. |
|
80 mA |
|
7 |
Fire Control Panel Alarm Current | Current of the fire control panel with Alarm and AC input failure. |
|
Amps
|
|
8 |
Panel Module Alarm Current | Current from panel modules in slots C through F with Alarm and AC input failure. |
|
Amps
|
|
9 |
External Device Alarm Current |
Current of SLC, NAC, and auxiliary devices with Alarm and AC input failure. |
|
Amps |
|
10 |
Total Alarm Current |
Total all alarm currents. |
|
Amps |
|
11 |
Standby Amp Hours |
Multiply total standby current with 24, 48, or 72 hours to provide the result in amp hours. |
Amp Hours |
|
|
12 |
Alarm Amp hours |
Multiply total alarm current with 5 or 15 minutes to provide the result in Amp hours: |
|
Amp Hours |
|
13 |
Sum Standby and Alarm Amp Hours | Combine the sum of amp hours for total standby and alarm. |
Amp Hours
|
|
|
14 |
Standby Battery Amp Hour Capacity | Multiply the combined amp hours with the de-rating factor of 1.2 |
Amp Hours
|
|
Supervising Station Requirements for Combination Systems
Due to system constraints, the use of a supervising station is required when the XT+ panel is used for providing Carbon Monoxide detection.