Source google image: http://qcmtest.fr/wp-content/uploads/2017/03/Les-symboles-du-plan-architectural-%C3%A9lectrique-4.jpg
Symbole electrique schema architectural
Source google image: http://qcmtest.fr/wp-content/uploads/2017/03/Les-symboles-du-plan-architectural-%C3%A9lectrique-4.jpg