Wiring:The iWave-R features a patented common 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) would be the neutral leg for 24VAC or 120VAC; or another warm leg for 208/240VAC. https://wealthscreening79012.blog-ezine.com/28702370/the-basic-principles-of-npo-authority