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