Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

FOOT

Symbols

Foot-operated switch

A foot-operated switch uses a pedal mechanism to change an electrical contact. Its schematic should state the contact state and whether the operator is momentary or retained.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / Manufacturer

A distinction that matters

Foot actuation describes the operator, not the safety category of the circuit.

Full reference

PB NO

Symbols

Normally open pushbutton

A normally open pushbutton combines an operator-actuated mechanism with a contact shown open in its defined normal state. Momentary and maintained or latching operation are separate characteristics that must be described explicitly.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / IEEE / ANSI

A distinction that matters

A NO contact symbol by itself does not identify the pushbutton actuator or its mechanical operating mode.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.