Filter
Top Products
Wire Requirements
MS-9200UDLS PN 52750:E1 01/27/09 207
E.1 NAC Wiring
The following table lists NAC wiring requirements for the FACP.
Notes:
1. Calculations are based on Direct-Current Resistance data for uncoated copper wire, per
National Electrical Code (2005 Edition) Table 8, Conductor Properties.
Table E.2 NAC Wiring Requirements for FACP
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 12.72 3295 2072 1301 819 1648 1036 650 409
0.5 6.36 1648 1036 650 409 824 518 325 205
0.75 4.24 1098 691 434 273 549 345 217 136
1 3.18 824 518 325 205 412 259 163 102
1.25 2.54 659 414 260 164 330 207 130 82
1.5 2.12 549 345 217 136 275 173 108 68
1.75 1.82 471 296 186 117 235 148 93 58
2 1.59 412 259 163 102 206 129 81 511
2.25 1.41 366 230 145 91 183 115 72 45
2.5 1.27 330 207 130 82 165 104 65 41