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 225.3 of the National Electrical Code (NEC) provides minimum conductor ampacity and minimum size requirements for outdoor branch circuits and feeders. Here’s a step-by-step guide on how to use Table 225.3:

  1. Determine the type of conductor being used (copper or aluminum).
  2. Determine the temperature rating of the conductor.
  3. Determine the type of raceway or cable being used.
  4. Find the appropriate column in Table 225.3 based on the type of raceway or cable being used.
  5. Find the row in the table that corresponds to the temperature rating and size of the conductor.
  6. The value in the table where the row and column intersect represents the minimum ampacity that is required for the conductor, and the minimum conductor size required for the circuit.
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