MASTER ELECTRICIAN PRACTICE EXAMS 2024/2025 WITH COMPLETE SOLUTIONS

The following questions are based on the 2020 edition of the National Electrical Code® and are typical of questions that may be encountered on most Master Electricians’ licensing exams. Select the best answer from the choices given and review your answers with the answer key. 1. What MINIMUM size ungrounded (phase) THWN copper service-entrance conductors are required for a 208Y/120-volt, 72,000 VA 3-phase commercial service? a. 250 kcmil b. 2/0 AWG c. 3/0 AWG d. 4/0 AWG 2. Exposed cable or raceways installed as part of an emergency system shall be permanently marked to be identified as a component of an emergency circuit or system at intervals NOT to exceed _____. a. 10 feet b. 20 feet c. 25 feet d. 30 feet 3. For a grounded electrical system supplied by a feeder or branch circuit, the equipment grounding conductor shall be sized in accordance with _____. a. the ungrounded circuit conductors b. the overcurrent protective device c. the service entrance conductors d. the grounding electrode