Bonding & Grounding

General design and installation requirements associated with the bonding and grounding connections in an electrical system

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Grounded Wires On Wall
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Highlights

Photo 1. When connections are properly installed, the bond is permanent and will not corrode or break over time.
Photo 1. When connections are properly installed, the bond is permanent and will not corrode or break over time.
Photo 1. When connections are properly installed, the bond is permanent and will not corrode or break over time.
Photo 1. When connections are properly installed, the bond is permanent and will not corrode or break over time.
Photo 1. When connections are properly installed, the bond is permanent and will not corrode or break over time.

Qualifying Permanent Ground Connections

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An inside look at the IEEE 837 Standard
Randy Ecm Asks 1
Randy Ecm Asks 1
Randy Ecm Asks 1
Randy Ecm Asks 1
Randy Ecm Asks 1

EC&M Asks Video — What Is Considered Proper Bonding for Lightning Protection Systems?

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Welcome to the inaugural episode of “EC&M Asks,” a new short video series featuring SMEs answering reader-submitted questions regarding popular electrical topics in 10 minutes...
The grounded conductor (white) is terminated in the panelboard on the grounded busbar. The green screw is the main bonding jumper connecting the grounded busbar to the enclosure. A threaded hub (upper right) provides secure bonding to metal enclosures. The smaller bare copper conductor on the left is the equipment grounding conductor providing bonding. The larger bare copper on the right is the grounding electrode conductor that connects the grounded busbar to the grounding electrode system (i.e., the ground rod held in the upper left).
The grounded conductor (white) is terminated in the panelboard on the grounded busbar. The green screw is the main bonding jumper connecting the grounded busbar to the enclosure. A threaded hub (upper right) provides secure bonding to metal enclosures. The smaller bare copper conductor on the left is the equipment grounding conductor providing bonding. The larger bare copper on the right is the grounding electrode conductor that connects the grounded busbar to the grounding electrode system (i.e., the ground rod held in the upper left).
The grounded conductor (white) is terminated in the panelboard on the grounded busbar. The green screw is the main bonding jumper connecting the grounded busbar to the enclosure. A threaded hub (upper right) provides secure bonding to metal enclosures. The smaller bare copper conductor on the left is the equipment grounding conductor providing bonding. The larger bare copper on the right is the grounding electrode conductor that connects the grounded busbar to the grounding electrode system (i.e., the ground rod held in the upper left).
The grounded conductor (white) is terminated in the panelboard on the grounded busbar. The green screw is the main bonding jumper connecting the grounded busbar to the enclosure. A threaded hub (upper right) provides secure bonding to metal enclosures. The smaller bare copper conductor on the left is the equipment grounding conductor providing bonding. The larger bare copper on the right is the grounding electrode conductor that connects the grounded busbar to the grounding electrode system (i.e., the ground rod held in the upper left).
The grounded conductor (white) is terminated in the panelboard on the grounded busbar. The green screw is the main bonding jumper connecting the grounded busbar to the enclosure. A threaded hub (upper right) provides secure bonding to metal enclosures. The smaller bare copper conductor on the left is the equipment grounding conductor providing bonding. The larger bare copper on the right is the grounding electrode conductor that connects the grounded busbar to the grounding electrode system (i.e., the ground rod held in the upper left).

10 Sure Ways to Tell the Difference Between Bonding & Grounding

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An in-depth look at how to apply all 10 Parts of NEC Art. 250 in the field
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Installation of a ground-fault circuit interrupter
Installation of a ground-fault circuit interrupter
Installation of a ground-fault circuit interrupter
Installation of a ground-fault circuit interrupter
Installation of a ground-fault circuit interrupter

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Ground-fault protection serves one purpose and grounding another. Do you know how these do or do not protect people from shock?
Fig. 1. Electrical installations for storable pools, spas, hot tubs, and immersion pools must comply with Part I and Part III of Art. 680.
Fig. 1. Electrical installations for storable pools, spas, hot tubs, and immersion pools must comply with Part I and Part III of Art. 680.
Fig. 1. Electrical installations for storable pools, spas, hot tubs, and immersion pools must comply with Part I and Part III of Art. 680.
Fig. 1. Electrical installations for storable pools, spas, hot tubs, and immersion pools must comply with Part I and Part III of Art. 680.
Fig. 1. Electrical installations for storable pools, spas, hot tubs, and immersion pools must comply with Part I and Part III of Art. 680.

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Do you know the requirements for manmade bodies of water other than permanently installed pools?
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Sept Wwh
Sept Wwh
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Sept Wwh

What's Wrong Here? Hint: PVC Conduit Calamity

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How well do you know the Code?
Fig. 1. Unlike traditional interlocked MC cable, the sheath of MCAP cable is listed and identified as an EGC.
Fig. 1. Unlike traditional interlocked MC cable, the sheath of MCAP cable is listed and identified as an EGC.
Fig. 1. Unlike traditional interlocked MC cable, the sheath of MCAP cable is listed and identified as an EGC.
Fig. 1. Unlike traditional interlocked MC cable, the sheath of MCAP cable is listed and identified as an EGC.
Fig. 1. Unlike traditional interlocked MC cable, the sheath of MCAP cable is listed and identified as an EGC.

The Differences Between Grounding and Bonding ― Part 8 of 12

Aug. 5, 2021
How well you implement Chapter 3 requirements directly affects how well you implement Article 250.
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Cover Image 60afcc77c6313
Cover Image 60afcc77c6313
Cover Image 60afcc77c6313
Cover Image 60afcc77c6313
Cover Image 60afcc77c6313

EC&M Tech Talk Video — Grounding & Bonding in a Nutshell

July 28, 2021
In this video (Episode 4), Randy Barnett, an electrical instructor, trainer, inspector, journeyman electrician, and safety expert, walks viewers how to navigate Article 250 of...
Fig. 1. Equipment grounding conductors must be sized not smaller than shown in Table 250.122; however, they are not required to be larger than the phase conductors.
Fig. 1. Equipment grounding conductors must be sized not smaller than shown in Table 250.122; however, they are not required to be larger than the phase conductors.
Fig. 1. Equipment grounding conductors must be sized not smaller than shown in Table 250.122; however, they are not required to be larger than the phase conductors.
Fig. 1. Equipment grounding conductors must be sized not smaller than shown in Table 250.122; however, they are not required to be larger than the phase conductors.
Fig. 1. Equipment grounding conductors must be sized not smaller than shown in Table 250.122; however, they are not required to be larger than the phase conductors.

The Differences Between Grounding and Bonding – Part 7 of 12

July 6, 2021
Do you know how to correctly size and install equipment grounding conductors?