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Before You Begin Installing
These cases are marked in the chart with an asterisk (*). Maximum length can never be more than 6,000 feet, regardless of gauge used.
(The formula used to generate this chart is shown in the note below).
Total Worst Case
Current Draw (amps)
0.100
0.200
0.300
0.400
0.500
0.600
0.700
0.800
0.900
1.000 (Max)
NOTE: The following formulas were used to generate the wire distance chart:
Maximum Resistance (Ohms) =
Maximum Wire Length (Feet) =
(6000 feet maximum)
where: Rpu = Ohms per 1000 feet for various Wire Gauges (see table below)
Wiring Distance calculation example:
Suppose a system is configured with the following SBUS modules:
2 - Module 5860 Fire Annunciator
1 - 5895XL Intelligent Power Expander
1 - 5865 LED Fire Annunciator
1 - 5824 Parallel/Serial Interface
The total worst case current is calculated as follows:
Using this value, and referring to the Wiring Distance table, it can be found that the available options are:
370 feet maximum using 22 Gauge wire
938 feet maximum using 18 Gauge wire
1493 feet maximum using 16 Gauge wire
2362 feet maximum using 14 Gauge wire
16
Table 2.6 Wire Distances Per Wire Gauge
Wiring Distance: SBUS Modules to Panel
22 Gauge
1852 ft.
926 ft.
617 ft.
463 ft.
370 ft.
309 ft.
265 ft.
231 ft.
206 ft.
185 ft.
Table 2.7 Typical Wire Resistance Per 1000 ft.
Wire Gauge
22
18
16
14
5860 Current Draw
= 2 x .100 amps
5895XL Current Draw
= 1 x .010 amps
5865 Current Draw
= 1 x .200 amps
5824 Current Draw
= 1 x .040 amps
Total Worst Case Current Draw
18 Gauge
4688 ft.
2344 ft.
1563 ft.
1172 ft.
938 ft.
781 ft.
670 ft.
586 ft.
521 ft.
469 ft.
6.0 Volts
Total Worst Case Current Draw (amps)
Maximum Resistance (Ohms)
Rpu
Ohms per 1000 feet (Rpu)
16.2
6.4
4.02
2.54
= .200 amps
= .010 amps
= .200 amps
= .040 amps
= .450 amps
5895XL Manual - P/N 151142-L8:L 08/09/2017
Wiring Specifications
16 Gauge
14 Gauge
* 6000 ft.
* 6000 ft.
3731 ft.
5906 ft.
2488 ft.
3937 ft.
1866 ft.
2953 ft.
1493 ft.
2362 ft.
1244 ft.
1969 ft.
1066 ft.
1687 ft.
933 ft.
1476 ft.
829 ft.
1312 ft.
746 ft.
1181 ft.
* 500
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