Wiring:The iWave-R has a patented universal voltage 24VAC to 240VAC enter capacity. The black wire (marked ‘AC’ on label) is for 24VAC to 240VAC voltage enter. The white wire (marked ‘N’ around the label) is definitely the neutral leg for 24VAC or 120VAC; or the other very hot leg https://donorprospectresearchsoftware.com/