Devices, symbols, and circuits:Devices and symbols

Objectives

• To understand basic electrical symbols

• To understand power and control circuits

• To read electrical drawings.

Devices and symbols

Any electrical drawing representing an electrical installation or a circuit takes the help of specific symbols to represent various electrical devices in shorthand. This provides a quick idea to the reader about a circuit or installation, and is particularly useful while troubleshooting.

Therefore, it is important to familiarize oneself with various symbols. Some of the commonly used device symbols are detailed in the following section and in Figure 2.1.