Fire-Lite MS-25E Addressable Fire Control Panel - Manual (Page 56)

Model MS-25 Installation and Operation Manual
5-4 53688
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 5-2 Calculating Wire Run Length for a T-tap