PB NO
Normally open pushbutton
A pushbutton contact normally shown open before actuation.
Schematic
Symbols · PB NC LAMP
Illuminated normally-closed pushbutton
An illuminated NC pushbutton combines a normally-closed manual contact with a lamp in the operator assembly.
Schematic · PB NC LAMP
What it represents
An illuminated NC pushbutton combines a normally-closed manual contact with a lamp in the operator assembly. Contact operation and illumination can have different circuit sources.
How to read it
- Read the contact's unoperated state without assuming that illumination means it is actuated.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- State lamp voltage
- Name indicated condition
- Reference contact terminal pair
A distinction that matters
A normally-closed contact function is independent of the lamp's on or off state.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
AutoCAD Electrical: Illuminated push buttons
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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