Source google image: https://schema-electrique.net/images/schema%20interrupteur%20va%20et%20vient%20voyant%20temoin_cl_hh_ME455.png
Schema electrique interrupteur voyant lumineux
Source google image: https://schema-electrique.net/images/schema%20interrupteur%20va%20et%20vient%20voyant%20temoin_cl_hh_ME455.png