Grounding vs Bonding Online Training

This article was posted 01/20/2006 and is most likely outdated.

Grounding vs Bonding: 250.62 Grounding Electrode Conductor—Material

January 20, 2006

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PART III. GROUNDING ELECTRODE SYSTEM AND GROUNDING ELECTRODE CONDUCTOR

Page 10 of 14

Sections

250.62 Grounding Electrode Conductor—Material.

The grounding electrode conductor, or its jumpers, can be solid or stranded, insulated or bare, and it must be copper, except aluminum is permitted if it is not subjected to corrosive conditions and not within 18 in. of the earth [250.64(A)]. Figure 250–111

Author’s Comment: The NEC doesn’t require the identification of the grounding electrode conductor or grounding electrode bonding jumpers. Common practice is to either not identify the conductor at all, or to apply green marking tape.

Figure 250–111
(Click on image to enlarge)

Grounding versus Bonding Library - DVDs

Grounding and bonding problems are at epidemic levels. Surveys repeatedly show a high percentage of power quality problems are due to poor grounding and bonding. Electrical theory has been applied to this difficult to understand Article, making it easier for students to grasp the concepts of grounding and bonding. Additionally, Mike has color coded the graphics so you can easily differentiate between grounding and bonding. For a limited time, you can order the Entire Grounding versus Bonding Library including the textbook, 2 videos, MP3 Audio CD and the Online Program for this great price. You save over $200!

Product Code: 05GBDVD
ISBN: N/A
MultiMedia: Tape & CDROM & DVD

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Table of Contents

Sample Pages

Sample Graphic

Comments

YOUR EXAMPLE PHOTO SHOWS TWO GROUND CLAMPS ON ONE ROD. THIS IMPLIES TO ME THAT THE GROUNDING ELECTRODE CONDUCTOR IS SPLICED AT THIS ROD. ISN'T AGAINST THE SPLICING RULE, OR IS THE ELECTRODE CONSIDERED AN APPROVED SPLICING AREA? WHEN SOME ELECTRICAL INSPECTORS STARTED REQUIRING THE SECOND ROD, AND I HAD ONLY DRIVEN ONE AS MOST INSPECTORS WERE REQUIRING AT THE TIME, I ALWAYS REPLACED THE WIRE WITH A NEW UNBROKEN WIRE FROM THE PANEL TO THE FIRST ROD CLAMP AND THEN TO THE SECOND ROD. WAS I WASTING TIME?

PAUL REDDEN

Reply from: Mike Holt
The NEC requires the Grounding Electrode Conductor to terminate to any convient electrode, not to all electrodes. See 250.64(E).

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