Wiring:The iWave-R features 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’ within the label) is the neutral leg for 24VAC or 120VAC; or the opposite sizzling leg for 208/240VAC. https://donorprospectresearchsoftware.com/