Wondering which electrical code articles to study to prepare for your electrical exam? The electrical code is complex and covers many aspects of electrical installation and safety. Yet not all code articles are equally relevant or important to successful exam preparation. In this blog post, we will highlight some of the key articles that you should focus on when preparing for the electrical exam.
Article 100, Definitions.
This article provides the definitions of terms that are used throughout the code, such as branch circuit, continuous load, grounded conductor, and so on. Understanding these terms is essential for interpreting and applying the code correctly.
Article 110, Requirements for Electrical Installations.
This article covers the general requirements for all electrical installations, such as clearances, markings, accessibility, protection, and grounding. It also contains some important tables and diagrams that show the minimum dimensions and ratings for various electrical components and equipment.
Article 210, Branch Circuits.
This article covers the requirements for branch circuits, which are the circuits that supply power to outlets, lighting fixtures, appliances, and other loads. Article 210 also specifies the minimum number and size of branch circuits, the maximum load and overcurrent protection for each branch circuit, and the rules for wiring and connecting branch circuits.
Article 220, Branch-Circuit, Feeder, and Service Load Calculations.
This article covers the methods and formulas for calculating the load and demand factors for different types of loads and occupancies. Article 220 is also important for determining the proper size and rating of conductors, overcurrent devices, and service equipment.
Article 230, Services.
This article covers the requirements for service conductors and equipment, which are the conductors and equipment that connect the utility supply to the building’s electrical system. It also specifies the location, size, rating, protection, and grounding of service conductors and equipment.
These are just some of the most important articles to study when preparing for the electrical exam. However, depending on your specific exam scope and jurisdiction, you may need to study additional code articles that relate to your area of practice or specialty.
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