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Many of you have completed our Online Continuing Education Courses which include video instruction and know this is a very fast way to obtain your CEU credits from the comfort of the chair you're sitting in. For the rest of you we are sending a weekly series of newsletters featuring an instructional page complete with videos.

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[ Challenge Yourself - Take Our FREE Grounding vs. Bonding Exam ]

Grounding versus Bonding — 2005 NEC®
PART I   Hi Res - Cable/DSL        Page 4 of 13


250.2 Definitions Continued

Grounding (Earthing) Electrode [100]. A device that establishes an electrical connection to the earth. Figure 250–11

Author’s Comment: See 250.50 through 250.70

Grounding Electrode (Earth) Conductor [100]. The conductor that connects the grounded neutral conductor at service equipment [250.24(A)], the building or structure disconnecting means enclosure [250.32(A)], or separately derived systems enclosure [250.30(A)] to an electrode (earth). Figure 250–12

Main Bonding Jumper [100]. A conductor, screw, or strap that bonds the equipment grounding (bonding) conductor at service equipment to the grounded neutral service conductor in accordance with 250.24(B). Figure 250–13

Author’s Comment: For more details, see 250.24(A)(4), 250.28, and 408.3(C) Figure 250–14

System Bonding Jumper [100]. The conductor, screw, or strap that bonds the metal parts of a separately derived system to a system winding in accordance with 250.30(A)(1). Figure 250–15

Author’s Comment: The system bonding jumper provides the low-impedance fault-current path to the electrical supply source for the purpose of clearing the ground fault. For more information see 250.4(A)(5), 250.28, and 250.30(A)(1).

Figure 250–11
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Figure 250–12
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Figure 250–13
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Figure 250–14
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Figure 250–15
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04. 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
MultiMedia: Tape & CDROM & DVD

DVD/CD Return Policy: Unopened sealed DVD's or CD's may be returned within 10 days and we will credit your credit card or issue a refund for the price of the item(s). Opened items may not be returned unless they arrive defective.

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