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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

    NEC Requirements for Services — Part 2

    May 15, 2024
    Do you know the rules for service entrance conductors and service disconnects?

    NEC Requirements for Services — Part 1

    April 16, 2024
    Do you understand the conductor and equipment requirements for services?

    NEC Requirements for Standby Power Systems

    March 18, 2024
    Standby power systems “kick in” when the normal power source is interrupted. But which type do you have?

    NEC Requirements for Energy Storage Systems

    Feb. 15, 2024
    The high energy levels in energy storage systems make them especially dangerous if they are not installed and maintained per Code.
    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