Course Content
Article 200 – Use and Identifications of Grounded Conductors
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Article 210 Branch Circuits
Article 210 of the National Electrical Code (NEC) covers the requirements for branch circuits, which are the circuits that supply power to the outlets, lighting fixtures, and other loads in a building. In this lesson, we will discuss the key requirements of Article 210.
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Article 215 Feeders
Article 215 of the National Electrical Code (NEC) covers the requirements for feeders, which are the circuits that supply power from the service equipment to the branch circuits in a building. In this lesson, we will discuss the key requirements of Article 215.
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Article 230 Services
In summary, Article 230 provides specific requirements for the installation of service conductors and equipment to ensure safe and reliable delivery of electrical power to buildings and structures.
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Article 242: Overvoltage Protection
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NEC Chapter 2 Wiring and Protection
About Lesson

Grounded conductors are an essential component of electrical systems, providing a safe and reliable path for current to flow. In this lesson, we will discuss the use and identification of grounded conductors in electrical systems.

  1. Definition of Grounded Conductors A grounded conductor, also known as a neutral conductor, is a conductor that is intentionally grounded at the service or at a separately derived system.

  2. Use of Grounded Conductors Grounded conductors are used to complete a circuit and carry current back to the source. They are typically connected to the neutral bus in a panelboard and are often identified by a white or gray insulation color.

  3. Identification of Grounded Conductors Grounded conductors must be identified by a white or gray outer finish or by three continuous white stripes on other than green insulation along its entire length. A grounded conductor that is re-identified must be identified by a color other than white, gray, or green.

  4. Misidentification of Grounded Conductors Misidentification of grounded conductors can be a serious safety hazard, as it can result in electrical shock or fire. It is important to ensure that grounded conductors are correctly identified, and that any re-identification is done according to NEC regulations.

  5. Grounded Conductors in Multiwire Branch Circuits In multiwire branch circuits, where two or more ungrounded conductors share a common grounded conductor, the grounded conductor must be identified by a white or gray outer finish or by three continuous white stripes on other than green insulation along its entire length, and must be connected to the neutral bus in a panelboard.

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