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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.
    Feb. 7, 2022
    An inside look at the IEEE 837 Standard
    EC&M Tech Talk — Article 250, Part X — Grounding and Bonding in Medium Voltage Systems
    Oct. 2, 2024
    Randy discusses the rules found in NEC Art. 250 grounding and bonding, Part X grounding of systems and circuits of over 1,000 volts.
    Mike Holt
    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
    Aug. 19, 2024
    Disconnecting means and wiring methods for solar installations must meet requirements specific to solar photovoltaic systems.
    July 17, 2024
    The circuit requirements for PV systems have two major “add-ins” versus those of other circuits.
    Feb. 15, 2024
    The high energy levels in energy storage systems make them especially dangerous if they are not installed and maintained per Code.
    Jan. 17, 2024
    Do you know the specific locations where GFCI and AFCI protection are required?
    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.
    Nov. 9, 2023
    The electrical conductors and equipment for connecting an electric vehicle to premises wiring must meet specific guidelines.