Connections, electric; Couplings, electric; Electric control panels; Fluorescent screens; Light emitting diodes (LEDs); Relays, electric; Resistances, electric; Sensor chips for scientific use; Switches, electric; Video screens; Voltage regulators; Voltage regulators for electric power; Electric voltage transformers; Electrical sensor apparatus for sensing the presence or absence of individuals or objects by contact or pressure; Electrical arc detection and suppressing device used in low volt...