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