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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
    Mike Holt
    Interconnected Power Sources

    NEC Requirements for Interconnected Power Sources

    Sept. 16, 2024
    Article 705 covers the installation of electric power sources operating in parallel with the primary source of power.
    Mike Holt

    NEC Requirements for Solar — Part 3

    Aug. 19, 2024
    Disconnecting means and wiring methods for solar installations must meet requirements specific to solar photovoltaic systems.

    NEC Requirements for Solar — Part 2

    July 17, 2024
    The circuit requirements for PV systems have two major “add-ins” versus those of other circuits.

    NEC Requirements for Solar — Part 1

    June 13, 2024
    Do you understand the general requirements and the bonding requirements for solar installations?

    NEC Requirements for GFCIs and AFCIs

    Jan. 17, 2024
    Do you know the specific locations where GFCI and AFCI protection are required?

    NEC Requirements for Fire Pumps

    Dec. 13, 2023
    Article 695 provides the minimum electrical requirements for installing fire pumps.
    Fig. 1. An electrically powered passenger vehicle needs a dedicated charging circuit. Article 625 provides the requirements for installing the conductors and equipment for electric vehicle charging, power export, or bidirectional current flow.

    NEC Requirements for EV Equipment

    Nov. 9, 2023
    The electrical conductors and equipment for connecting an electric vehicle to premises wiring must meet specific guidelines.
    Fig. 1. Locations are classified according to the properties of the hazard.

    NEC Requirements for Hazardous Locations

    Oct. 11, 2023
    Article 500 prepares you for properly applying Articles 501 through 516.