# ANSI/IEEE chassis ground symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-chassis-ground
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: -
Drawing use: Schematic
Reference families: IEEE / ANSI

## Symbol convention

Convention: IEEE / ANSI
Form: Chassis ground form
Independent illustration in IEEE drafting context; no equivalence of every detailed standard graphic is asserted.

IEEE-oriented chassis or frame ground drawn as a line ending in angled strokes, used for equipment frame returns.

## In plain English

### What does ANSI/IEEE chassis ground mean?

US-practice electronics and control schematics show chassis ground as a line ending in a horizontal bar with angled strokes beneath it. It identifies a connection to the equipment frame and is often used for screen terminations and filter returns inside an enclosure.

### A simple example

This illustration is an independent explanation, not the IEEE graphic. As with the IEC frame connection, chassis ground is not proof that the frame is connected to earth ground. Safety grounding should be shown with the protective ground symbol.

### What the drawings help you do

Do not treat chassis ground as earth ground without a separate bond. Look for screen terminations on chassis grounds. Chassis ground ties to the frame; earth ground ties to the grounding electrode system.

### This particular reference

IEEE-oriented chassis or frame ground drawn as a line ending in angled strokes, used for equipment frame returns. Chassis ground ties to the frame; earth ground ties to the grounding electrode system.

### Terms

- Terminal: An identified point where a conductor connects.
- Schematic: A drawing showing function and connections rather than physical appearance.

Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference
A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.

- [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/)
- [Autodesk IEEE Symbol Preview — Miscellaneous](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-34282BFD-7B8E-48F3-A6ED-93ADBDDDFBD3.htm)


## What it represents

US-practice electronics and control schematics show chassis ground as a line ending in a horizontal bar with angled strokes beneath it. It identifies a connection to the equipment frame and is often used for screen terminations and filter returns inside an enclosure.
This illustration is an independent explanation, not the IEEE graphic. As with the IEC frame connection, chassis ground is not proof that the frame is connected to earth ground. Safety grounding should be shown with the protective ground symbol.

## How to read it

- Do not treat chassis ground as earth ground without a separate bond.
- Look for screen terminations on chassis grounds.

## Information to show or reference

- Show the bond between chassis and earth ground.
- Keep chassis and signal commons distinct.
- Identify chassis stud locations.

## Important distinction

Chassis ground ties to the frame; earth ground ties to the grounding electrode system.

## Facts

- Convention evidence: IEEE 315 graphic conventions for chassis or frame connection (standards context only)
- Standards context: IEEE/ANSI 315-1975 covers diagram graphics; IEEE lists this edition as Inactive-Reserved.
- Preview: Original educational illustration; consult the publisher and applicable standard for the exact graphic

## Public references

- [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/) — IEEE Standards Association. Graphic-symbol standards context and official status; not a source of reproduced artwork.
- [Autodesk IEEE Symbol Preview — Miscellaneous](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-34282BFD-7B8E-48F3-A6ED-93ADBDDDFBD3.htm) — Autodesk. Public IEEE-oriented earth and ground forms.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.