NO
Normally open contact
A contact shown open in the normal state defined for its device.
Schematic
Symbols · Lamp
Indicator lamp
A visual indicator associated with a documented control or equipment condition.
Schematic · Lamp
What it represents
An indicator lamp shows an operating condition defined by its circuit and label. The generic representation identifies an indicating element; it does not define what illumination means, the supply voltage or whether the device is continuously lit or flashing.
A schematic should explain the condition driving the indication. The front-panel description should match the electrical label, so a reviewer can follow the indication from operator interface to contact, relay or controller output.
How to read it
- Read the text describing the indicated condition.
- Follow the circuit supplying the lamp and identify any flashing or test function.
Information to show or reference
- Record the indication label.
- Reference the supply and device type.
- Align schematic identification with the panel layout.
A distinction that matters
An indication mark does not establish that equipment is safe, isolated or de-energised. Its meaning comes from the full circuit and operating documentation.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Pilot lights: public symbol reference
Public pilot-light and indication categories.
IEC-60617 symbol preview directory
Public lighting and indication drawing categories.
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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