# ANSI/IEEE functional equipotential bonding symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-functional-equipotential-bonding
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: -
Drawing use: Schematic
Reference families: IEEE / ANSI, Manufacturer

## Symbol convention

Convention: IEEE / ANSI
Form: Autodesk IEEE-oriented functional equipotential bond form
Autodesk publishes this block under IEEE Symbol Preview: Miscellaneous. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Related representation: [Functional equipotential bonding](https://eloragrid.ai/symbols/functional-equipotential-bonding)

IEEE-oriented functional equipotential bond used to keep equipment at a common reference for operation or noise control.

## In plain English

### What does ANSI/IEEE functional equipotential bonding mean?

A functional equipotential bond ties equipment together for operational reasons, such as keeping communications equipment at a common reference or reducing high-frequency noise. The publisher's IEEE miscellaneous preview lists a functional equipotential bond form, the counterpart of the existing IEC concept page.

### A simple example

This illustration is an independent explanation and not the IEEE graphic. A functional bond does not satisfy protective bonding requirements unless it is also sized and installed as a protective conductor. Drawings should not use the functional form where a safety bond is intended.

### What the drawings help you do

Do not treat a functional bond as a protective one. Check high-frequency bonding requirements for drives and comms. A functional bond supports operation; a protective bond provides safety during faults.

### This particular reference

IEEE-oriented functional equipotential bond used to keep equipment at a common reference for operation or noise control. A functional bond supports operation; a protective bond provides safety during faults.

### Terms

- 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.

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


## What it represents

A functional equipotential bond ties equipment together for operational reasons, such as keeping communications equipment at a common reference or reducing high-frequency noise. The publisher's IEEE miscellaneous preview lists a functional equipotential bond form, the counterpart of the existing IEC concept page.
This illustration is an independent explanation and not the IEEE graphic. A functional bond does not satisfy protective bonding requirements unless it is also sized and installed as a protective conductor. Drawings should not use the functional form where a safety bond is intended.

## How to read it

- Do not treat a functional bond as a protective one.
- Check high-frequency bonding requirements for drives and comms.

## Information to show or reference

- State the reason for the functional bond.
- Size it separately from protective bonds.
- Label bonded equipment.

## Important distinction

A functional bond supports operation; a protective bond provides safety during faults.

## Facts

- Convention evidence: Autodesk IEEE Symbol Preview: Miscellaneous (Functional Equipotential Bond)
- Public vendor block name: HGND1 (Autodesk identifier; not an IEEE symbol number)
- 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

- [Autodesk IEEE Symbol Preview — Miscellaneous](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-34282BFD-7B8E-48F3-A6ED-93ADBDDDFBD3.htm) — Autodesk. Exact public IEEE-oriented category page listing the functional equipotential bond form.
- [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.

## 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.