Wiring:The iWave-R provides a patented universal voltage 24VAC to 240VAC enter ability. The black wire (marked ‘AC’ on label) is for 24VAC to 240VAC voltage enter. The white wire (marked ‘N’ within the label) may be the neutral leg for 24VAC or 120VAC; or the opposite very hot leg for 208/240VAC.It predicts who the most beneficial potential