A circuit diagram uses circuit symbols to show how components are connected in a circuit. It doesn't show what the circuit actually looks like, or how long all the connections are.

Troubleshooting Motor Control Circuits — Part 1 Isolating problems in the main power circuit Feb. 16, 2015 5 min read ...

The symbols are well chosen and a study of the circuit diagrams will give the necessary complementary knowledge to that given in text-books. A Handbook of Telephone Circuit Diagrams: with ...