Appendix A: System calculations
P/N 3101890-EN • REV 006 • ISS 21JUN18 175
Table 70: Maximum branch length with 11 to 15 GSA-UMs/GSA-MABs configured for two-wire smokes
Module
addresses
Maximum allowable wire distance using non-twisted, non-shielded wire pairs
18 AWG 16 AWG 14 AWG
ft m ft m ft m
–25 0 3931 1198 6245 1904 9932 3028
–50 0 3427 1045 5444 1660 8659 2640
–75 0 2928 893 4651 1418 7397 2255
–100 0 2432 741 3864 1178 6145 1873
–125 0 1941 592 3083 940 4903 1495
1–25 3247 990 5158 1572 8204 2501
–25 1–25 2722 830 4324 1318 6878 2097
–50 1–25 2202 671 3498 1066 5563 1696
–75 1–25 1686 514 2678 816 4259 1298
–100 1–25 1174 358 1865 569 2966 904
–125 1–25 666 203 1058 323 1683 513
26–50 2204 672 3502 1067 5570 1698
–25 26–50 1664 507 2644 806 4205 1282
–50 26–50 1129 344 1793 547 2852 870
–75 26–50 598 182 950 290 1511 461
–100 26–50 71 22 113 34 179 55
–125 26–50
51–75 1263 385 2007 612 3192 973
–25 51–75 710 216 1128 344 1794 547
–50 51–75 161 49 256 78 407 124
–75 51–75
–100 51–75
–125 51–75
76–100
–25 76–100
–50 76–100
–75 76–100
–100 76–100
–125 76–100
101–125
–25 101–125
–50 101–125
–75 101–125
–100 101–125
–125 101–125