Wiring:The iWave-R has a patented universal voltage 24VAC to 240VAC enter capability. The black wire (marked ‘AC’ on label) is for 24VAC to 240VAC voltage input. The white wire (marked ‘N’ about the label) could be the neutral leg for 24VAC or 120VAC; or another scorching leg for 208/240VAC. https://caidenskbqg.59bloggers.com/29050814/donor-search-things-to-know-before-you-buy