# ANSI/IEEE terminal with wire number change symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-terminal-with-wire-number-change
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: TB
Drawing use: Schematic
Reference families: IEEE / ANSI, Manufacturer

## Symbol convention

Convention: IEEE / ANSI
Form: Autodesk IEEE-oriented Round with Wire Number Change terminal
Autodesk publishes this block under IEEE Symbol Preview: Terminals. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Related representation: [Terminal with wire-number transition](https://eloragrid.ai/symbols/iec-terminal-with-wire-number-transition)

IEEE-oriented round terminal at which the wire number changes, with a different number on each side.

## In plain English

### What does ANSI/IEEE terminal with wire number change mean?

The publisher's IEEE terminal preview includes a round terminal form at which the wire number changes. It is used at boundaries such as panel to field interfaces, where the panel wiring uses one numbering scheme and the field cable cores another.

### A simple example

This illustration is independent and not the IEEE graphic. The electrical connection is continuous; only the identifier changes. Readers tracing a circuit must follow the number change, and the terminal plan should list both numbers against the terminal.

### What the drawings help you do

Follow the new wire number beyond the terminal. Check both numbers appear on the terminal plan. The change form renumbers the wire; the standard wire number form keeps one number through the terminal.

### This particular reference

IEEE-oriented round terminal at which the wire number changes, with a different number on each side. The change form renumbers the wire; the standard wire number form keeps one number through the terminal.

### 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.

- [Autodesk IEEE Symbol Preview — Terminals](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7C566B17-0C91-47F1-AD86-73893490622C.htm)
- [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/)


## What it represents

The publisher's IEEE terminal preview includes a round terminal form at which the wire number changes. It is used at boundaries such as panel to field interfaces, where the panel wiring uses one numbering scheme and the field cable cores another.
This illustration is independent and not the IEEE graphic. The electrical connection is continuous; only the identifier changes. Readers tracing a circuit must follow the number change, and the terminal plan should list both numbers against the terminal.

## How to read it

- Follow the new wire number beyond the terminal.
- Check both numbers appear on the terminal plan.

## Information to show or reference

- Show both wire numbers at the terminal.
- List both on the terminal plan.
- Use the change form only at genuine boundaries.

## Important distinction

The change form renumbers the wire; the standard wire number form keeps one number through the terminal.

## Facts

- Convention evidence: Autodesk IEEE Symbol Preview: Terminals (Round with Wire Number Change)
- Public vendor block name: HT1002 (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 — Terminals](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7C566B17-0C91-47F1-AD86-73893490622C.htm) — Autodesk. Exact public IEEE-oriented terminal preview listing the round with wire number change 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.