# One-line bus tap

Canonical URL: https://eloragrid.ai/symbols/iec-one-line-bus-tap
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: HDV1_BT_1-
Drawing use: SLD, Schematic
Reference families: IEC, Manufacturer

## Symbol convention

Convention: IEC
Form: One-line bus tap
Autodesk IEC-60617 Symbol Preview — One-line bus-tap representation; vendor family reference, not certified IEC geometry or database identifier.

A bus-tap representation identifies a branch from a bus in a simplified power circuit.

## What it represents

A bus-tap representation identifies a branch from a bus in a simplified power circuit.
Label the outgoing feeder and distinguish actual branch connectivity from crossing lines.
Dot, tee and corner layouts are presentation variants, not separate equipment models.

## How to read it

- Label the outgoing feeder and distinguish actual branch connectivity from crossing lines.
- Dot, tee and corner layouts are presentation variants, not separate equipment models.

## Information to show or reference

- Identify the associated device, circuit or diagram boundary.
- Label the outgoing feeder and distinguish actual branch connectivity from crossing lines.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.

## Important distinction

Dot, tee and corner layouts are presentation variants, not separate equipment models.

## Facts

- Reference scope: Specific public IEC-context family form
- Publisher reference token: HDV1_BT_1-, HDV1_BTT_1-, HDV1_BTL_1- (Autodesk token; not a verified IEC database ID)
- Information added: Label the outgoing feeder and distinguish actual branch connectivity from crossing lines.
- Preview: Independent educational concept; consult the publisher and applicable standard for the exact graphic

## Public references

- [Autodesk IEC-60617 preview: One-line bus-tap representation](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-9EC851F1-8B92-428B-A657-5B21B2325C62.htm) — Autodesk. Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content.

## 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.