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