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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In Class II, Division 1 locations, what is the maximum length for a rigid metal conduit (RMC) stem without flexibility for pendant mounted luminaires?

10 inches
12 inches
14 inches
16 inches

The correct answer is: 12 inches

In Class II, Division 1 locations, systems must adhere to specific guidelines that ensure safety and minimize the risk of explosion or fire hazards. One such guideline pertains to the installation of pendant mounted luminaires, specifically regarding the length of a rigid metal conduit (RMC) stem. The maximum length for an RMC stem without flexibility is set at 12 inches. This limitation is in place to limit the potential for mechanical stress and the risk of dislodgement, as longer stems could introduce vulnerabilities in an environment where explosive materials may be present. Keeping the length manageable helps to mitigate these risks while ensuring that the luminaire is securely mounted. The other lengths provided (10, 14, and 16 inches) either fall short of the maximum allowable length or exceed the recommended safety standards for such installations, which is why 12 inches is the optimal choice.