Electrical installations include electrical schematics

Understanding wiring diagrams is essential for any intervention on the circuit. The electrical system is very codified: symbols and color codes are used by all manufacturers and builders.

Electrical symbols are universally used to describe an electrical installation. All devices require a connection to the electrical installation are provided by manufacturers with their wiring diagrams.You must therefore know the symbols used to make your wiring safe.

Wiring diagram: color codes

Electrical standards set colors for each type of yarn. This standard in the electrical installation can easily determine a breakdown or performing operations on the circuit. Mark for the son:
- The son needed for current flow are red (phase) and blue (neutral). 
- Two colors have been reserved for the wire to the earth green and yellow.
- The thread phase can also be black or brown. 

In fact, black, brown or orange are often used to indicate the link between a switch (command) and a lighting or appliance.