Hey Sparky, Why? Article 250, 2020 NEC

Summary

In this video, Bill from Sparky Channel discusses key grounding electrode system installation practices, addressing common questions from viewers. He explains the importance of keeping the grounding electrode conductor (GEC) continuous and outlines the requirements for proper splicing and connection methods according to the 2020 NEC. Bill also debunks misconceptions about cutting ground rods and emphasizes the necessity of using proper UL-listed components to avoid corrosion and ensure system integrity. He clarifies why a broken or faulty ground connection can render the entire grounding system ineffective and provides useful insights into NEC Article 250.

Takeaways

• 😀 The video discusses grounding electrode systems and the correct installation methods, particularly focusing on ground rods and grounding electrode conductors (GEC).
• 😀 Grounding electrode conductors (GEC) must be continuous without splices or joints, as per the 2020 NEC code, unless specific exceptions apply.
• 😀 Exceptions to GEC continuity allow for splicing using irreversible compression type connectors or the exothermic welding process, among other methods.
• 😀 The 2020 NEC specifies the acceptable methods for making splices in grounding electrode conductors, ensuring the connection remains permanent and effective.
• 😀 If you're working on a building or electrical project, you may need to splice the GEC during remodeling or equipment replacement, following NEC guidelines.
• 😀 Ground rods should not be cut at the top, as this could result in failure during an inspection. The top of the ground rod should remain intact and visible to inspectors.
• 😀 The examples in the video, featuring ground rods with cuts at the top, are from a simulation during the Ideal National Championship in Nashville, Tennessee.
• 😀 It's crucial to use UL-listed ground clamps and ground rods, designed specifically for their purpose, to prevent corrosion and ensure safety.
• 😀 Cutting a ground wire can cause serious grounding issues. If the wire is cut, it can result in faulty intermediate grounding connections, which can render the entire system ineffective.
• 😀 Keeping the grounding electrode conductor continuous ensures that even if one connection is faulty, the rest of the system remains intact and functional.
• 😀 The video aims to clarify these grounding-related issues in the context of the NEC code, helping viewers better understand electrical grounding standards.

Q & A

What is the topic of the video discussed in the transcript?

The video discusses the correct method for wiring a grounding electrode system, specifically focusing on ground rods and grounding electrode conductors (GEC).

What does 'GEC' stand for in the National Electrical Code (NEC)?

GEC stands for Grounding Electrode Conductor, which is the wire that connects the grounding system to the ground rods.

Does the grounding electrode conductor need to be continuous according to the NEC?

Yes, the NEC requires that the grounding electrode conductor be installed in one continuous length without any splices or joints, unless specific splicing methods are followed.

What are the allowed methods of splicing a grounding electrode conductor?

Splices or connections of the GEC are allowed only by irreversible compression-type connectors, exothermic welding, or specific types of bus bars, bolted connections, and other methods as described in the NEC.

Why is it not permissible to cut the top of a ground rod?

Cutting the top of a ground rod is not allowed because it removes the identification writing required by the NEC, which is essential for the inspector to verify the ground rod's compliance.

What type of ground clamp and ground rod should be used to prevent corrosion?

The ground clamp and ground rod used should be UL-listed and designed specifically for grounding applications to ensure proper performance and prevent corrosion.

What is the consequence of cutting the ground wire or making faulty intermediate grounding connections?

If the grounding conductor is cut or there are faulty intermediate connections, it could render the entire grounding system ineffective. A continuous, unbroken conductor ensures that any faulty intermediate connection does not affect the overall grounding performance.

Why does the video mention the Ideal National Championship and its simulation?

The video mentions the Ideal National Championship, where the grounding system setup was simulated, to clarify that the pictures shown in the video were from a controlled, non-operational setup, not an actual installation.

What are some of the common misconceptions addressed in the video?

The video addresses misconceptions about splicing the GEC, cutting the top of ground rods, and concerns about corrosion. It clarifies the proper methods for installation and the importance of using proper materials.

How does the video help viewers understand Article 250 of the NEC?

The video provides a practical explanation of the NEC's Article 250, which covers grounding and bonding, and addresses common questions and misconceptions to ensure proper installation and compliance with the code.