My language is not good. I work in electric panels and sometimes I see "COM" on the equipments. Is that an abbreviation? If yes, what is the definition of it?
I want to know what "COM , L+ , L- , 0V(volt)" means.
I want to know how I can make them or at least how they are made. I also want to know why they are actually made.
September 13, 2013 9:36 PM
September 16, 2013 12:08 PM