Appendix d: wire requirements, D.1 ms-5ud-3(e) & ms-10ud-3(e) nac wiring, D.1: ms-5ud-3(e) & ms-10ud-3(e) nac wiring – Fire-Lite MS-10UD Series FACP User Manual
Page 132: Table d.1 facp wire specifications
132
MS-5UD & MS-10UD Series Manual — P/N 52626:C4 3/7/2014
Appendix D: Wire Requirements
Connecting external system accessories to the main circuits must be carefully considered to ensure
proper operation. It is important to use the correct type of wire, gauge and run length for each cir-
cuit. Reference the chart below to specify wire requirements and limitations for each circuit.
D.1 MS-5UD-3(E) & MS-10UD-3(E) NAC Wiring
The following table lists NAC wiring requirements for the MS-5UD-3(E) & MS-10UD-3(E) FACP
which utilizes the FLPS-3 power supply.
CIRCUIT CONNECTIONS
WIRE REQUIREMENTS
Circuit Type
Circuit Function
Wire Type and
Limitations
Recommended
Max. Distance
Feet (meters)
Wire Gauge
Initiating Device
Circuit
(power-limited)
Connects to Initiating
Devices
Untwisted, unshielded wire
(maximum loop resistance
not to exceed 100 ohms)
Distance limitation
set by 100 ohm
resistance limitation
12-18 AWG (3.25 - 0.75 mm
2
)
ANN-BUS (EIA-485)
power-limited
Communication for
ANN-BUS annunciator
and relay modules
Twisted pair a maximum
loop resistance of 120
ohms
6,000 (1,800 m)
12-18 AWG (3.25 - 0.75 mm
2
)
ANN-BUS Power
Power for ANN-BUS
annunciators
Refer to Table 2.1, “Wiring Distances,” on page 42 for information on device wiring
24 VDC Regulated,
resettable,
nonresettable
Power for accessories
and
4-wire devices
Untwisted, unshielded wire
Distance limitation
set by 4 volt
maximum line drop
12-18 AWG (3.25 - 0.75 mm
2
)
Auxiliary Trouble
Input
Open Collector trouble
input for CHG-75,
CHG-120F, etc.
Single conductor
Distance limitation
20 feet in same
room
18 AWG (0.75 mm
2
)
Remote Sync Output
Provides strobe and
normal sync for
remote NAC power
supplies
Untwisted, unshielded pair
wire
Distance set by 295
ohm resistance
limitation
12-18 AWG (3.25 - 0.75 mm
2
)
NAC Outputs
Connects to NAC
devices or Release
devices
Untwisted, unshielded pair
wire
Refer to Section D.1 and Section D.2 on page 133.
Table D.1 FACP Wire Specifications
NAC Load
(Amps)
Max.
allowable total
loop
resistance
(ohms)
CLASS-B
Max. allowable wire pair length
(feet)
CLASS-A
Max. allowable wire pair length
(feet)
AWG 12
solid
AWG 14
solid
AWG 16
solid
AWG 18
solid
AWG 12
solid
AWG 14
solid
AWG 16
solid
AWG 18
solid
0.25
6.00
1554
977
613
386
777
489
307
193
0.5
3.00
777
489
307
193
389
244
153
97
0.75
2.00
518
326
204
129
259
163
102
64
1
1.50
389
244
153
97
194
122
77
48
1.25
1.20
311
195
123
77
155
98
61
39
1.5
1.00
259
163
102
64
130
81
51
32
1.75
0.86
222
140
88
55
111
70
44
28
2
0.75
194
122
77
48
97
61
38
24
2.25
0.67
173
109
68
43
86
54
34
21
2.5
0.60
155
98
61
39
78
49
31
19
Table D.2 NAC Wiring Requirements for FACP with FLPS-3 Power Supply
NOTE: Calculations are based on Direct-Current Resistance data for uncoated copper wire, per
National Electrical Code (2005 Edition) Table 8, Conductor Properties.