Appendix B: Worksheets
222
EST iO64 and iO500 Technical Reference Manual
Table 5: Longest allowable circuit path with 11 to 15 SIGA-UMs or SIGA-MABs configured for 2-wire smoke detectors
Maximum allowable wire distance using nontwisted, nonshielded and
twisted, nonshielded wire pairs (evenly distributed)
18 AWG
16 AWG
14 AWG
Number of
detectors
Number of
modules (1
or 2 channel) ft. m ft. m ft. m
1 to 25
0
1817 554 2887 880 4592 1400
26 to 50
0
1070 326 1699 518 2703 824
51 to 75
0
321 98 510 156 811 247
76 to 100
0
0 0 0 0 0 0
101 to 125
0
0 0 0 0 0 0
0 1
to
25
1490 454 2367 721 3764 1147
1 to 25
1 to 25
745 227 1184 361 1883 574
26 to 50
1 to 25
0 0 0 0 0 0
51 to 75
1 to 25
0 0 0 0 0 0
76 to 100
1 to 25
0 0 0 0 0 0
101 to 125
1 to 25
0 0 0 0 0 0
0 26
to
50
421 128 668 204 1063 324
1 to 25
26 to 50
0 0 0 0 0 0
26 to 50
26 to 50
0 0 0 0 0 0
51 to 75
26 to 50
0 0 0 0 0 0
76 to 100
26 to 50
0 0 0 0 0 0
101 to 125
26 to 50
0 0 0 0 0 0
0 51
to
75
0 0 0 0 0 0
1 to 25
51 to 75
0 0 0 0 0 0
26 to 50
51 to 75
0 0 0 0 0 0
51 to 75
51 to 75
0 0 0 0 0 0
76 to 100
51 to 75
0 0 0 0 0 0
101 to 125
51 to 75
0 0 0 0 0 0
0 76
to
95
0 0 0 0 0 0
1 to 25
76 to 95
0 0 0 0 0 0
26 to 50
76 to 95
0 0 0 0 0 0
51 to 75
76 to 95
0 0 0 0 0 0
76 to 100
76 to 95
0 0 0 0 0 0
101 to 125
76 to 95
0 0 0 0 0 0
