NEC Commercial Electrical Practice Test

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Prepare for the NEC Commercial Electrical Test with multiple choice questions each with detailed explanations. Study efficiently to excel in your exam!

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What do service conductors connect to?

  1. The main electrical panel

  2. The splices on the last aerial support pole

  3. The service-entrance conductors at the building

  4. The ground electrical systems

The correct answer is: The service-entrance conductors at the building

Service conductors are critical components in electrical installations, as they are responsible for delivering electricity from the utility company's source to a building's electrical system. They specifically connect to the service-entrance conductors at the building. This connection is essential because the service-entrance conductors are the first point of entry for electrical power into a facility. This configuration allows the service conductors to effectively carry the current into the main electrical distribution panel where the electricity is then distributed throughout the building. The service-entrance conductors include both the hot and neutral conductors, along with the grounding conductor, ensuring that the electrical system is safely bonded to the earth. This grounding is vital for the protection of both equipment and personnel against electrical shock, as well as for the prevention of electrical fires.

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