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

Table 230.51 in the NEC provides minimum ampacity requirements for service and feeder conductors based on the size of the overcurrent device and the type of conductor insulation. Here are the steps to use this table:

  1. Determine the size of the overcurrent device protecting the service or feeder conductors.
  2. Find the column in Table 230.51 that corresponds to the size of the overcurrent device.
  3. Find the row in Table 230.51 that corresponds to the type of conductor insulation being used.
  4. The number in the intersection of the row and column is the minimum ampacity required for the service or feeder conductors.
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