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An image of an electrician installing a 240-volt EV charging station, with attention to detail, tools, and safety gear in a residential environment.

Electrical Code Mastery Quiz

Test your knowledge of the National Electrical Code (NEC) with our comprehensive quiz designed for electricians, students, and anyone interested in electrical safety and regulations.

In this quiz, you will:

Answer challenging multiple-choice questions.
Enhance your understanding of electrical installations.
Prepare for certification exams.

5 Questions1 MinutesCreated by WiringWizard537

A journeyman electrician is installing a 240-volt, single-phase electric vehicle (EV) charging station at a residential property. The charging station has a continuous load rating of 40 amperes. According to the National Electrical Code (NEC), what is the minimum size of the circuit breaker required for this installation?

40 A

50 A

60 A

70 A

What is the maximum allowable voltage drop for a branch circuit serving a 120-volt, single-phase, 15-ampere load with a conductor length of 100 feet, according to the National Electrical Code (NEC)?

3.6 volts

4.6 volts

5.6 volts

6.6 volts

What is the minimum size equipment grounding conductor required for a circuit using 4 AWG copper conductors and protected by a 90-ampere overcurrent protection device?

4 AWG

6 AWG

10 AWG

8 AWG

What is the maximum number of 12 AWG THHN conductors permitted in a 3/4-inch Electrical Metallic Tubing (EMT)?

What is the minimum required working space in front of a 480V switchgear, measured from the live parts or the enclosure, under Condition 3?

4ft

2ft

3ft

5ft

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