8-5
Chapter 8 EPS and IDNet 2 Wiring
EPS Wiring Tables
Class B Wiring
Tables
Use the following tables to calculate the load.
TrueAlert ES Speakers and Speaker/Visible appliances must use Table 8-4 in place of Table
8-2.
Maximum wiring distance is the shorter of the distance limits as calculated by alarm current
voltage drop or by reaching the communications distance limit.
Continued on next page
Table 8-1. UTP Wiring Limit Based on
Alarm Current
Table 8-2. UTP Wiring Limit Based on Communication
Alarm
Current
Distance to the Last Appliance
Line
Impedance
(Ohms)
Devices
Distance to the Last Appliance
20
AWG
18
AWG
16
AWG
14
AWG
12
AWG
20
AWG
18
AWG
16
AWG
14
AWG
12
AWG
0.050
4000 ft 4000 ft 4000 ft 4000 ft 4000 ft 14.54 1 1252 ft 2038 ft 3241 ft 4000 ft 4000 ft
0.100 2644 ft
4000 ft 4000 ft 4000 ft 4000 ft 12.96 5 1142 ft 1815 ft 2887 ft 4000 ft 4000 ft
0.150 1763 ft 2802 ft
4000 ft 4000 ft 4000 ft 11.38 10 1003 ft 1595 ft 2536 ft 4000 ft 4000 ft
0.200 1322 ft 2102 ft 3342
4000 ft 4000 ft 10.14 15 893 ft 1420 ft 2258 ft 3590 ft 4000 ft
0.250 1058 ft 1681 ft 2674 ft
4000 ft 4000 ft 9.12 20 804 ft 1278 ft 2033 ft 3231ft 4000 ft
0.300 881 ft 1401 ft 2228 ft 3542 ft
4000 ft 8.28 25 730 ft 1160 ft 1845 ft 2934 ft 4000 ft
0.350 755 ft 1201 ft 1910 ft 3036 ft
4000 ft 7.58 30 668 ft 1061 ft 1688 ft 2683 ft 4000 ft
0.400 661 ft 1051 ft 1671 ft 2657 ft
4000 ft 6.97 35 614 ft 977 ft 1553 ft 2469 ft 3928 ft
0.450 588 ft 934 ft 1485 ft 2362 ft 3756 6.45 40 568 ft 904 ft 1437 ft 2285 ft 3634 ft
0.500 529 ft 841 ft 1337 ft 2125 ft 3380 6.00 45 528 ft 840 ft 1336 ft 2124 ft 3378 ft
0.750 353 ft 560 ft 891 ft 1417 ft 2254 ft 5.60 50 493 ft 784 ft 1247 ft 1982 ft 3152 ft
1.000 264 ft 420 ft 668 ft 1063 ft 1690 ft 5.24 55 462 ft 734 ft 1168 ft 1856 ft 2952 ft
1.250 212 ft 336 ft 535 ft 850 ft 1352 ft 4.92 60 434 ft 690 ft 1097 ft 1744 ft 2774 ft
1.500 176 ft 280 ft 446 ft 708 ft 1127 ft 4.75 63 419 ft 665 ft 1058 ft 1682 ft 2675 ft
1.750 151 ft 240 ft 382 ft 607 ft 966 ft 4.64 65 409 ft 650 ft 1034 ft 1643 ft 2613 ft
2.000 132 ft 210 ft 334 ft 531 ft 845 ft 4.38 70 386 ft 614 ft 976 ft 1552 ft 2468 ft
2.250 118 ft 187 ft 297 ft 472 ft 751 ft 4.15 75 366 ft 581 ft 924 ft 1469 ft 2337 ft
2.500 106 ft 168 ft 267 ft 425 ft 676 ft 3.94 80 347 ft 551 ft 877 ft 1394 ft 2217 ft
2.750 96 ft 153 ft 243 ft 386 ft 615 ft 3.74 85 330 ft 524 ft 833 ft 1325 ft 2107 ft
3.000 88 ft 140 ft 223 ft 354 ft 563 ft 3.56 90 314 ft 499 ft 794 ft 1262 ft 2006 ft
Wiring distance must not exceed 4000 ft
3.40 95 299 ft 476 ft 757 ft 1203 ft 1913 ft
3.24 100 286 ft 454 ft 723 ft 1149 ft 1827 ft
Table 8-3. Ohms per 1000 ft
3.10 105 273 ft 435 ft 691 ft 1099 ft 1748 ft
Gage Ohms/1000 ft 2.97 110 262 ft 416 ft 662 ft 1052 ft 1673 ft
20 AWG 11.347 2.85 115 251 ft 399 ft 634 ft 1009 ft 1604 ft
18 AWG 7.137 2.73 120 241 ft 383 ft 609 ft 968 ft 1539 ft
16 AWG 4.488 2.58 127 228 ft 362 ft 576 ft 915 ft 1456 ft
14 AWG 2.8230
Wiring distance must not exceed 4000 ft
12 AWG 1.7750
Note: Although the required wire for IDNAC circuits is twisted pair (controlled impedance) wiring, some applications will wish to
take advantage of existing wiring that is not twisted pair. This is only allowed if both conductors of the IDNAC circuit reside
in the same metal conduit, and only under certain conditions. Check with your local sales office before using wiring that is
not twisted pair.
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