Wiring:The iWave-R provides a patented common voltage 24VAC to 240VAC enter capacity. The black wire (marked ‘AC’ on label) is for 24VAC to 240VAC voltage enter. The white wire (marked ‘N’ over the label) may be the neutral leg for 24VAC or 120VAC; or another scorching leg for 208/240VAC. https://juliusngxpd.blogdeazar.com/28723431/little-known-facts-about-i-wave