# Branch Circuit, Individual: Building Code Definition

> How the IRC 2009 define branch circuit, individual, where the wording differs, and which chapters depend on the term.

- Canonical: https://harth.build/resources/glossary/branch-circuit-individual/
- Last updated: 2026-09-07
- Data source: Definitions quoted from the 2009 International Codes as transcribed in this site's building-codes collection, with the source chapter linked for each quotation. Usage counts are computed over the chapters hosted here, one copy per code. The [ICC code library](https://codes.iccsafe.org/codes) publishes the current model text and the [ICC adoption maps](https://www.iccsafe.org/advocacy/code-adoption-maps/) show which edition a jurisdiction has adopted; those sources control.

## Key facts

| Fact | Value |
| --- | --- |
| Defined in | IRC 2009 (2009 editions transcribed in this corpus) |
| Primary source | IRC 2009 Electrical Definitions (model text, not a jurisdiction's adopted text) |
| Chapters using the term | 6 (counted across the codes hosted here) |
| Wording identical across codes | Single code (compare before citing one code's wording under another) |

## Direct answer

Branch circuit, individual is a defined term in the International Residential Code (IRC) 2009, in Electrical Definitions. The code's own words are: “A branch circuit that supplies only one utilization equipment.” No other I-Code in this corpus defines it, so the IRC 2009 definition is the one to work from. The term is used in 6 chapters of this corpus, most often in Branch Circuit and Feeder Requirements (IRC 2009), Swimming Pools (IRC 2009), Devices and Luminaires (IRC 2009). These pages transcribe the 2009 model text; verify the definition against the edition and amendments your authority having jurisdiction has adopted. Record the jurisdiction, the adopted edition, the application date and any local amendment that rewrites the definition before you use it on a live project, because a term redefined by amendment changes every requirement that depends on it.

*Content and cited inputs reviewed by [Scott Barrington](https://nz.linkedin.com/in/barrington), Harth founder and architectural technology specialist · Published 2026-09-07 · Updated 2026-09-07.*

## What does this term mean?

**Branch Circuit, Individual** — IRC 2009, Electrical Definitions:

> A branch circuit that supplies only one utilization equipment.

![Labeled code-term definition diagram: Branch Circuit, Individual: Building Code Definition](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/glossary/branch-circuit-individual/diagram-1344.webp)

*How the IRC 2009 define branch circuit, individual, where the wording differs, and which chapters depend on the term.*

## What must be verified before using this guidance?

**Branch Circuit, Individual** is defined once in this corpus, in the [Electrical Definitions](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/electrical-definitions.md) chapter of the International Residential Code (IRC) 2009:

> A branch circuit that supplies only one utilization equipment.

## Where branch circuit, individual is used in the code

The term appears in 6 chapters of the 2009 I-Codes hosted here. The chapters that lean on it hardest are the ones to read next.

| Chapter | Code | Mentions |
| --- | --- | --- |
| [Branch Circuit and Feeder Requirements](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/branch-circuit-and-feeder-requirements.md) | IRC 2009 | 5 |
| [Swimming Pools](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/swimming-pools.md) | IRC 2009 | 3 |
| [Devices and Luminaires](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/devices-and-luminaires.md) | IRC 2009 | 2 |
| [Power and Lighting Distribution](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/power-and-lighting-distribution.md) | IRC 2009 | 2 |
| [Appliance Installation](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/appliance-installation.md) | IRC 2009 | 1 |
| [Electrical Definitions](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/electrical-definitions.md) | IRC 2009 | 1 |

### The term in use

How the code actually writes about branch circuit, individual, quoted from the 2009 text hosted here:

> Central heating equipment other than fixed electric space heating shall be supplied by an individual branch circuit.

— [IRC 2009 §E3703.1](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/branch-circuit-and-feeder-requirements.md)

> Hydromassage bathtubs and their associated electrical components shall be supplied by an individual branch circuit(s) and protected by a readily accessible ground-fault circuit-interrupter.

— [IRC 2009 §E4209.1](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/swimming-pools.md)

> A single receptacle installed on an individual branch circuit shall have an ampere rating not less than that of the branch circuit.

— [IRC 2009 §E4002.1.1](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/devices-and-luminaires.md)

> A receptacle for a cord-and-plug-connected range hood shall be supplied by an individual branch circuit.

— [IRC 2009 §E4101.3](https://harth.build/resources/building-codes/us-states/maryland/irc-2009/appliance-installation.md)


## The terms branch circuit, individual is built out of

The definition above leans on 4 other defined terms. Each carries its own code definition, and a local amendment to any of them changes what branch circuit, individual covers:

- **[Utilization Equipment](https://harth.build/resources/glossary/utilization-equipment.md)** — IRC 2009: Equipment that utilizes electric energy for electronic, electromechanical, chemical, heating' lighting or similar purposes.
- **[Branch Circuit](https://harth.build/resources/glossary/branch-circuit.md)** — IRC 2009: The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s).
- **[Equipment](https://harth.build/resources/glossary/equipment.md)** — IRC 2009: All piping, ducts, vents, control devices and other components of systems other than appliances that are permanently installed and integrated to provide control of environmental conditions for buildings.
- **[Branch](https://harth.build/resources/glossary/branch.md)** — IRC 2009: Any part of the piping system other than a riser, main or stack.

## Branch Circuit, Individual: what to open, and in what order

Every row is a document this term depends on. The [ICC code library](https://codes.iccsafe.org/codes) and the [ICC adoption maps](https://www.iccsafe.org/advocacy/code-adoption-maps/) cover the middle rows.

| Check | Where | Confirmed |
| --- | --- | --- |
| Read the definition in the adopted IRC | Electrical Definitions | |
| Re-check the requirement that uses it | Branch Circuit and Feeder Requirements (IRC 2009) | |
| Re-check the requirement that uses it | Swimming Pools (IRC 2009) | |
| Re-check the requirement that uses it | Devices and Luminaires (IRC 2009) | |
| Re-check the requirement that uses it | Power and Lighting Distribution (IRC 2009) | |
| Confirm the dependent definition | Utilization Equipment | |
| Confirm the dependent definition | Branch Circuit | |
| Confirm the dependent definition | Equipment | |
| Local amendment to any of the above | Jurisdiction's amendment list | |

**A research aid, not a code determination.** The authority having jurisdiction decides which edition and which amendments apply.

## Where can you explore related guidance?

- [Explore all glossary guidance](https://harth.build/resources/glossary.md)
- [Utilization Equipment: Building Code Definition](https://harth.build/resources/glossary/utilization-equipment.md)
- [Branch Circuit: Building Code Definition](https://harth.build/resources/glossary/branch-circuit.md)
- [Equipment: Building Code Definition](https://harth.build/resources/glossary/equipment.md)
- [Branch: Building Code Definition](https://harth.build/resources/glossary/branch.md)

## Sources and method

Definitions quoted from the 2009 International Codes as transcribed in this site's building-codes collection, with the source chapter linked for each quotation. Usage counts are computed over the chapters hosted here, one copy per code. The [ICC code library](https://codes.iccsafe.org/codes) publishes the current model text and the [ICC adoption maps](https://www.iccsafe.org/advocacy/code-adoption-maps/) show which edition a jurisdiction has adopted; those sources control.

### Source links

- [codes.iccsafe.org](https://codes.iccsafe.org/codes)

- [iccsafe.org](https://www.iccsafe.org/advocacy/code-adoption-maps/)

## Frequently asked questions

### What is the code definition of branch circuit, individual?

The International Residential Code (IRC) 2009 defines it in Electrical Definitions as: “A branch circuit that supplies only one utilization equipment.” The 2009 model text is reproduced here; the definition that binds your project is the one in the edition your jurisdiction has adopted, as amended locally.

### Which parts of the code depend on branch circuit, individual?

In this corpus the term is used across 6 chapters, led by Branch Circuit and Feeder Requirements in the IRC 2009. Those are the sections whose scope moves if the definition is amended locally, so read them together with Chapter 2 rather than on their own.

### What is an individual branch circuit?

In the 2009 I-Codes hosted here it is a defined term rather than a description. The IRC 2009 states, in Electrical Definitions: “A branch circuit that supplies only one utilization equipment.” It is defined in IRC 2009. Because it is a defined term, whatever the adopted edition says it means is what every section using it means — so check Chapter 2 of that edition and any local amendment before relying on this wording.

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