Does bonding replace grounding?

No. Bonding connects conductive parts within the electrical system, while grounding connects designated parts to earth. A complete installation may use both functions together.

What can interrupt a bonding path?

Loose connections, corrosion, paint between contact surfaces, damaged conductors, and disconnected metal sections can interrupt continuity. Inspection should cover each intended connection point.

Why do metal enclosures need bonding?

Metal enclosures need bonding so an enclosure that becomes energized has a defined path for fault current. That path supports operation of the system's protective equipment.

Glossary

What Is Bonding?

Bonding is the intentional electrical connection of conductive parts, such as metal enclosures, equipment grounding conductors, and metal piping, to keep them at a similar electrical potential. The connection creates a continuous path for fault current to return toward the source, helping protective devices respond when an unintended energized condition occurs.

Quick Facts About Bonding

Key Takeaways About Bonding

Bonding connects conductive parts within an electrical system.
Continuity helps fault current travel toward the source.
Bonding and grounding perform related but different functions.

How Bonding Works

Two hands tighten a green wire terminal inside a metal electrical box on a workbench

Bonding links conductive parts that could carry electricity during a fault. These parts may include metal equipment cabinets, raceways, service enclosures, and other accessible metal components. The connections create electrical continuity across the system, so current does not stop at an isolated metal section.

Related glossary terms: Ground Fault, Electrical Service, Service Entrance.

An electrician checks bonding by inspecting connection points and testing continuity between related conductive parts. A loose fastener, coating, corrosion, or damaged conductor can interrupt that path. Bonding works with grounding, which connects the electrical system to earth through grounding electrodes and related conductors. The two functions interact, but they describe different paths and purposes.

Hands work inside an open electrical box, testing wires with tools spread across a workbench

From the Center Electric Service team

When we perform Electrical Grounding Installation, we inspect the intended bonding points and verify that conductive parts connect continuously. Our team checks connection surfaces, conductors, enclosures, and service equipment for conditions that could interrupt the path. We document practical issues that may require correction before the installation is complete.

Bonding in Practice: A Real-World Example

A home grounding project may include bonding the service equipment enclosure to the grounding system. The connection helps keep the enclosure and related metal parts at a similar electrical potential during a fault.