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

Article 242 of the National Electrical Code (NEC) covers the requirements for overvoltage protection. Overvoltage protection is an essential part of an electrical system as it helps to protect equipment from damage caused by voltage spikes, surges, and transients.

Here are some key points to remember when working with overvoltage protection as per NEC Article 242:

  1. Voltage protection devices (VPDs) must be installed where the voltage could exceed the equipment rating.

  2. VPDs must be capable of limiting the magnitude and duration of overvoltage to levels that are not hazardous to the electrical system or the connected equipment.

  3. A listed surge protective device (SPD) may be used as a VPD.

  4. VPDs must be installed in accordance with the manufacturer’s instructions and with the applicable NEC requirements.

  5. The conductor lengths from the service equipment or power source to the VPD must not exceed the lengths specified in the NEC.

  6. The VPD must be installed in a readily accessible location and must be properly marked to indicate its purpose

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