Wiring:The iWave-R provides a patented universal voltage 24VAC to 240VAC input ability. The black wire (marked ‘AC’ on label) is for 24VAC to 240VAC voltage enter. The white wire (marked ‘N’ on the label) may be the neutral leg for 24VAC or 120VAC; or the opposite hot leg for 208/240VAC.Others may work with the concept of staying very simpl