In electrical schematics, a terminal block is often depicted as a rectangle or series of circles, each representing an individual terminal. Each terminal is usually labeled with a unique identifier, such as TB1:1, TB1:2, etc., where "TB" stands for Terminal Block and the numbers indicate the block and terminal position . Lines or arrows are drawn to show the connections between terminals and other components in the circuit . Some diagrams may also include symbols for ground, power, or fused terminals depending on the type of terminal block .
In a wiring diagram, the terminal block is shown in a simplified layout that emphasizes the physical arrangement of terminals and wire connections. This often includes:
Software tools like AutoCAD Electrical or EPLAN allow you to create custom terminal symbols. Typically, you:
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