E.1: Nac Wiring - Fire-Lite MS-9200UDLS Manual

Wire Requirements
E.1 NAC Wiring
The following table lists NAC wiring requirements for the FACP.
NAC Load Max.
(Amps) allowable
total loop
resistance
(ohms)
0.25 12.72
0.5 6.36
0.75 4.24
1 3.18
1.25 2.54
1.5 2.12
1.75 1.82
2 1.59
2.25 1.41
2.5 1.27
Notes:
1. Calculations are based on Direct-Current Resistance data for uncoated copper wire, per
National Electrical Code (2005 Edition) Table 8, Conductor Properties.
210
CLASS-B
Max. allowable wire pair length
(feet)
AWG 12 AWG 14 AWG 16
solid solid solid
3295 2072 1301
1648 1036 650
1098 691 434
824 518 325
659 414 260
549 345 217
471 296 186
412 259 163
366 230 145
330 207 130
Table E.2 NAC Wiring Requirements for FACP
Max. allowable wire pair length
AWG 18 AWG 12 AWG 14
solid solid solid
819 1648 1036
409 824 518
273 549 345
205 412 259
164 330 207
136 275 173
117 235 148
102 206 129
91 183
82 165 104
MS-9200UDLS/E/C Manual — P/N 52750:F 7/26/2010
NAC Wiring
CLASS-A
(feet)
AWG 16 AWG 18
solid solid
650 409
325 205
217 136
163 102
130 82
108 68
93 58
81 511
115 72 45
65 41