Analysis of Smart Wall Switch without Neutral Wire Compatibility Issue

Abstract

The smart wall switch without neutral wire is low cost solution to convert ordinary residential lighting into smart lighting. However, for the smart wall switch, the actual circuit is not totally off. There is a tiny electrical current flowing from Line through the switch, through the LED luminaire and to Neutral for keeping the controller work. Although this current is tiny enough, it cannot be compatible with some LED luminaire. This paper analyzes incompatible reason and condition for occurrence, and provide suggestion to avoid incompatibility issue.