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    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.

    Qualifying Permanent Ground Connections

    Feb. 7, 2022
    An inside look at the IEEE 837 Standard
    Fig. 1 The rules of Art. 445 include where generators can be installed, nameplate markings, conductor ampacity, and disconnect requirements.

    NEC Requirements for Generators

    Sept. 13, 2023
    Conductor sizing and the requirements for disconnecting means are the main electrical considerations in a generator installation.
    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

    Electrical Troubleshooting Quiz — August 1, 2023

    Aug. 1, 2023
    What is the real problem here, and what should your response be?
    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
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    Grounded Wires On Wall

    Monthly Quiz: Grounding and Bonding Connections

    May 1, 2023
    Take this quiz about grounding/bonding basics and enter for a chance to win a $25 gift card to Amazon, iTunes, or Cabela’s!
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    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.

    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?
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    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...