Honeywell HPP31076 Optional Class A (Style Z) AdapterThe HPP31076 is an optional adapter to connect four Class A (Style Z) NAC circuits It mounts directly onto the terminal block TB4 of the control circuit board on the following notification appliance circuit expanders: HPFF8(E), HPFF8CM(E), HPFF12(E), and HPFF12CM(E). The adapter kit includes two plastic standoffs to provide support. The same gauge wire must be used if two conductors are connected to the same terminal of any terminal block.