The combined zone units (210z1, 210z2) are each connected to each other and the building master controller (201) via successive lengths of a twisted 2 core cable (209).

A climate control system (200) is provided with a building master controller (201) and in each zone (z1, z2) is provided with a combined zone unit (210z1, 210z2).

The system (48) includes a master controller (72) that is disposed in communication with controllers (68) associated with reclosers (52, 64) and switches coupled to a first and second branch circuit (30, 31).

The system includes a master controller that couples to a phase of a power distribution system and provides a synchronization signal, the phase of the power distribution system having a phase voltage.