Wiring:The iWave-R has a patented common voltage 24VAC to 240VAC input capacity. The black wire (marked ‘AC’ on label) is for 24VAC to 240VAC voltage input. The white wire (marked ‘N’ on the label) could be the neutral leg for 24VAC or 120VAC; or another warm leg for 208/240VAC. https://donorprospectresearchsoftware.com/