I have several old school mechanical assembly men that are used to having their e-stops wired so that when pushed in (activated) there is no light and when pulled out (de-activated) is lit up. My schooling and understanding of NEC code is that the e-stop should not be lit up if pulled out (de-activated) and if pushed in (activted) should be lit up red indicating a e-stop condition is present. Could someone else weigh in here and clarify this?