Honeywell 6820EVS Installation And Optimization Manual page 106

Model 6820 / 6820-EVS Installation Manual LS10144-001SK-E
Figure 7-1 and Figure 7-2 show how wire length is determined for out & back tap and T-Tap.
Figure 7-1 Calculating wire run length for a simple out and back
When using T-taps, the total length of all taps and the main bus must not exceed 40,000 feet. This requirement
must be met in addition to the maximum distance requirements for the various wire gauges.
Figure 7-2 Calculating Wire Run Length for a T-Tap
7-5