Class B Wiring Diagram (No Isolators)
For Class B wiring with no isolators, T-Tapping is allowed. SLC wiring may be split multiple times to form SLC wiring branches. Maximum wire distance
of each of these SLC branches from the panel to any device is the smaller of the values obtained from Table 6 and Table 7. Add the alarm loads of all
of the devices on an SLC branch and apply to Table 6. Add the unit loads (see Table 3) of all the devices on an SLC branch and apply it to Table 7. Use
of Table 6 and Table 7 requires all SLC wire branches join within 10 feet (3 m) of the panel. T-tap wire stubs are allowed on the SLC wire branches, but
each tap must be less than 100 feet (30 m).
Note:
Each B+ and B- terminal is rated for 2 identical wires. This allows up to 4 Class B T-Tap circuits directly from each Terminal Block. See Figure 10.
Figure 10: Class B wiring, no isolators
page 15 579-336 Rev. M
4100-5120, 4100-5121, 4100-5122 TrueAlert Power Supply Installation Instructions
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