Journeyman Electrician Practice Exam

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Prepare for the Journeyman Electrician Exam. Test your skills with multiple-choice questions designed to help you succeed. Each question comes with hints and detailed explanations to assist in your study process.

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According to the NEC, what is the maximum length permitted for a flexible cord supplying a 208-volt, single-phase air-conditioner?

4 feet
5 feet
6 feet
7 feet

The correct answer is: 6 feet

The maximum length permitted for a flexible cord supplying a 208-volt, single-phase air-conditioner, according to the National Electrical Code (NEC), is indeed 6 feet. This regulation ensures that flexible cords are used in a manner that minimizes the risk of overheating and provides adequate strain relief. Since air conditioners can create significant electrical loads, limiting the length of the flexible cord helps prevent voltage drop and reduces the chance of damage due to excessive heat or wear on the cord itself. In practical terms, this limitation is put in place to also ensure safety and compliance with installation practices, ensuring that any flexible connection does not exceed the length that could potentially cause electrical hazards or operational inefficiencies. By adhering to the 6-foot stipulation, electricians can ensure that the air-conditioning unit operates safely and effectively within the guidelines set forth by the NEC.