Can a feeder supply more than one branch circuit?

Yes, a feeder can supply a downstream panel that distributes power through multiple branch circuits. Each branch circuit receives protection from its own downstream overcurrent device.

What determines the correct feeder conductor size?

The connected load, conductor material, insulation rating, wiring method, terminal ratings, and surrounding installation conditions determine the appropriate feeder conductor size.

Does a feeder need separate neutral and grounding paths?

A feeder’s neutral and equipment grounding arrangements depend on the equipment location and system design. The downstream panel must follow the applicable wiring configuration for that installation.

Glossary

What Is A Feeder?

A feeder is an electrical conductor or group of conductors that carries power from service equipment, a main panelboard, or another power source to a downstream panel or distribution point. Feeders supply branch circuits indirectly. Their conductor size, insulation, overcurrent protection, and installation method must match the connected load and wiring conditions.

Quick Facts About Feeder

Key Takeaways About Feeder

A feeder supplies downstream distribution equipment.
Feeder conductors are sized for the connected load.
A feeder is not the same as a branch circuit.

How Feeder Works

Two men inspect wiring in an open electrical panel, while one points and holds pliers inside a utility room

A feeder transfers electrical power from a source panel or service point to downstream distribution equipment. The receiving equipment may be a subpanel or another panelboard that supplies individual branch circuits. Feeder conductors carry the combined demand of the circuits served by that equipment.

Related glossary terms: Subpanel, Panelboard, Ampacity.

Electricians select feeder conductors and overcurrent protection according to the expected load, conductor material, insulation, installation method, and available equipment. The feeder may run through conduit, cable, or another approved wiring method. A branch circuit begins at the downstream overcurrent device and supplies outlets, lighting, or fixed equipment directly. That boundary gives feeders and branch circuits different roles in a wiring system.

A hand holds several black cables against labeled metal terminals marked INPUT, FEEDER, and OUTPUT

From the Chris Miller Electric team

When we inspect a feeder during whole-house rewiring, we trace its path from the source panel to the downstream equipment. We check conductor condition, terminations, grounding and neutral arrangements, overcurrent protection, and the load served. We also look for damaged insulation, loose connections, or wiring methods that no longer suit the installation.

Feeder in Practice: A Real-World Example

During a whole-house rewiring project, a feeder may carry power from the main panel to a subpanel serving a separate area of the home. The subpanel then distributes that power through individual branch circuits for lighting and receptacles.