How to Convert a SmartPack between 3-Phase and Single Phase

SmartPacks, both rackmount and wallmount, were sold in both three-phase (three hots plus neutral) and split-phase (two hots plus neutral) variants. Either variant can be freely converted between three-phase and split-phase in the field by rewiring the power input leads inside the unit.

There are three power terminals on the power board inside any SmartPack, labeled L1, L2, and L3. There are six power input leads which connect to these terminals; the labeling of the input leads depends on the variant. When the leads are connected to L1, L2, and L3, the SmartPack is wired for three-phase. When the leads are connected to only L1 and L3 but not L2, the SmartPack is wired for split-phase. See the charts below for specific wiring information.

If your SmartPack is configured for three-phase but connected to a split-phase service, or vice versa, dimmers may not fade properly or may switch between 0% and 100% instead of dimming. This does not generally cause permanent damage to the rack; it should just be disconnected from the service and reconfigured for the correct phasing.

SmartPack accepts an input voltage range of 85-140VAC phase-neutral, and frequencies 47-63Hz.

SmartPacks originally wired as split-phase

	L1	L2	L3
Split-phase	1A, 1B, 1C	none	2A, 2B, 2C
Three-phase	1A, 2A	1B, 2B	1C, 2C

Split-Phase Setup

Three-Phase Setup