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