Basics

The foundation of electrical theory and the application of its principles

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

Feb. 7, 2022
An inside look at the IEEE 837 Standard
Fig. 1. A motor branch-circuit OCPD must be able to carry the motor’s starting current.
Fig. 1. A motor branch-circuit OCPD must be able to carry the motor’s starting current.
Fig. 1. A motor branch-circuit OCPD must be able to carry the motor’s starting current.
Fig. 1. A motor branch-circuit OCPD must be able to carry the motor’s starting current.
Fig. 1. A motor branch-circuit OCPD must be able to carry the motor’s starting current.

NEC Requirements for Motors – Part 2 of 2

Aug. 9, 2023
Do you know how to protect motors and related equipment from overcurrent and ground faults?
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quiz
quiz
quiz
quiz
quiz

Electrical Troubleshooting Quiz — August 1, 2023

Aug. 1, 2023
What is the real problem here, and what should your response be?
Swimming pool
Swimming pool
Swimming pool
Swimming pool
Swimming pool

A Deep Dive Into Article 680

July 13, 2023
Understanding equipotential bonding requirements for swimming pools, fountains, and similar installations as outlined in Art. 680 of the NEC
Fig. 1. Use the rules in Art. 430 to calculate and apply overcurrent protection for motors.
Fig. 1. Use the rules in Art. 430 to calculate and apply overcurrent protection for motors.
Fig. 1. Use the rules in Art. 430 to calculate and apply overcurrent protection for motors.
Fig. 1. Use the rules in Art. 430 to calculate and apply overcurrent protection for motors.
Fig. 1. Use the rules in Art. 430 to calculate and apply overcurrent protection for motors.

NEC Requirements for Motors – Part 1 of 2

July 12, 2023
Do you know the basics of Art. 430, including what overload protection is and what the requirements are for overload protection?
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Broadcast video caption
Broadcast video caption
Broadcast video caption
Broadcast video caption
Broadcast video caption
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Grounded Wires On Wall
Grounded Wires On Wall
Grounded Wires On Wall
Grounded Wires On Wall
Grounded Wires On Wall
Randy Ecm Asks 4
Randy Ecm Asks 4
Randy Ecm Asks 4
Randy Ecm Asks 4
Randy Ecm Asks 4

EC&M Asks Video — NEC Sec. 110.14 General Rules and Temperature Limits

April 21, 2023
In Episode 13, Randy Barnett covers questions about Sec. 110.14 and grounding electrodes.
Fig. 1. Rigid metal conduit requirements can be found in NEC Art. 344.
Fig. 1. Rigid metal conduit requirements can be found in NEC Art. 344.
Fig. 1. Rigid metal conduit requirements can be found in NEC Art. 344.
Fig. 1. Rigid metal conduit requirements can be found in NEC Art. 344.
Fig. 1. Rigid metal conduit requirements can be found in NEC Art. 344.

NEC Requirements for Metal Conduits

April 14, 2023
Do you know the rules for installing the four types of metal conduit listed in the NEC?
Benfield Promo Image 3
Benfield Promo Image 3
Benfield Promo Image 3
Benfield Promo Image 3
Benfield Promo Image 3

It's Back: Benfield Conduit Bending Manual

April 3, 2023
The classic manual in the electrical industry, with simple math and clear instructions for bending conduit of various materials, for a wide variety of real-world scenarios. Just...
grounding and bonding connection
grounding and bonding connection
grounding and bonding connection
grounding and bonding connection
grounding and bonding connection

How To Make Proper Grounding and Bonding Connections

March 15, 2023
Best practices for applying the eight methods outlined in Sec. 250.8 of the NEC