BV—3×2.5: PVC insulated conductor with hard copper core and 3 2.5mm2 conductors.
G20 is the pipe diameter,
SR: laying along the steel cable
CE: laying along the ceiling surface or ceiling surface.
Wc: Buried in the wall.
Extended data:
Electrical layout and installation drawings are mainly used to show the actual installation positions of various electrical equipment on mechanical equipment and electrical control cabinets. Provide necessary information for the manufacture, installation, maintenance and repair of mechanical and electrical control equipment.
The electrical installation wiring diagram provides detailed information about the electrical connection between various installation wiring diagram items, including the connection relationship of wiring devices, equipment or complete sets of equipment, cable types and laying lines.
Electrical schematic label
Common signs are: breaker, FU fuse, KM contactor, KA intermediate relay, KT time relay, KS speed relay, FR thermal relay, SB button and SQ travel switch.
Reference source: Baidu Encyclopedia-Electrical Schematic Diagram