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Grounding vs. Bonding: What You Should Know
Grounding vs. Bonding: What You Should Know
May 31,2024

Grounding vs. Bonding: What You Should Know

Grounding and bonding are two concepts in electrical work which can often be misunderstood. Despite their distinct roles in ensuring electrical safety, they are frequently confused. This confusion can lead to misconceptions about their functions and importance.

In this brief article brought to you by Mr. Electric, we will clarify what grounding and bonding mean, touch on their differences, and underscore their significance in the electrical system. If you have any questions or concerns, or if you need urgent electrical repair service, you can call Mr. Electric to hire a uniformed and certified electrician.

What is Grounding?

Grounding refers to connecting an electrical system to the earth. The primary purpose of grounding is to provide a reference point for voltage levels within the system and to ensure that excess electricity from a lightning strike or a power surge, for example, has a safe path to dissipate into the ground.

In more technical terms, grounding stabilizes the voltage levels throughout an electrical system. By providing a common return path for electric current, grounding helps prevent dangerous voltage build-up that could lead to electric shocks, fires, or damage to electrical equipment.

What is Bonding?

Bonding, on the other hand, involves connecting all the metal parts of an electrical system together and to the grounding system. The purpose of bonding is to make sure that all conductive materials within an electrical system have the same electrical potential. This prevents differences in voltage that could cause electric shock or arc flash.

Bonding is fundamental for electrical safety. It ensures that if a fault occurs, such as a live wire touching a metal part, then the current has a low-resistance path back to the source, which is usually tripping a circuit breaker or blowing a fuse, thereby preventing electric shock or fire.

Why are these two often confused?

Grounding and bonding are frequently confused for several reasons:

  • They have related functions. Both grounding and bonding are integral to the safety of an electrical system.
  • People use the term interchangeably: The terms "grounding" and "bonding" are often used interchangeably in casual conversation, leading to misconceptions. However, in the context of electrical systems, they refer to different processes with distinct purposes.
  • Electrical systems are complex: Electrical systems are inherently complex, and the intricacies of grounding and bonding can be difficult to grasp without specialized knowledge. This complexity can lead to oversimplification and confusion about their functions.

The importance of proper grounding and bonding

Both grounding and bonding are essential for maintaining the safety and reliability of electrical systems. They protect individuals from electric shock and electrical fires by ensuring that fault currents have a safe path to follow.

Grounding also helps protect electrical equipment from damage caused by power surges and lightning strikes. Without proper grounding, sensitive electronic devices can be irreparably harmed by voltage spikes.

Finally, there’s the legal aspect. Electrical codes and standards, such as the National Electrical Code (NEC) in the United States, mandate proper grounding and bonding practices. Adhering to these regulations is necessary for legal compliance and ensuring safe electrical installations.


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