I am trying to find a standard for NFPA symbols, specifically a selector switch. When I draw in my selector switch symbols, the symbol represents the actual physical contact. In the example below the selector switch has one normally open contact. But in order for the switch to be set in the RAPID position, the normally open contact needs to be closed. That contact being closed is indicated by the state, "XO".
I am debating how the symbol should be drawn with co-workers. They believe that because the tail is pointing to "RAPID" and the state shows X for that position, the symbol needs to be drawn as normally closed instead of normally open. I want to make sure we are following industry standard.
Am I using the NFPA schematic selector switch correctly? On a side note, is there a standard anywhere for NFPA symbols?
