Journeyman Electrician Practice Exam 2025 - Free Electrician Practice Questions and Study Guide

A 125-volt receptacle outlet for a central vacuum assembly in an attached garage must have GFCI protection to ensure safety. This requirement is in line with the National Electrical Code (NEC), which mandates that any receptacle outlet located in areas where water may be present, such as garages, must be protected by a Ground Fault Circuit Interrupter (GFCI).

GFCIs are designed to detect ground faults, which occur when there is a leakage of current to the earth, potentially causing electric shock. In a garage setting, where the risk of exposure to water is higher, GFCI protection is crucial to minimize the chance of electrical hazards.

While standard fuse protection, surge protection, and no protection may offer certain levels of safety in other contexts, they do not specifically address the unique dangers associated with an environment like a garage, where the availability of moisture significantly raises the risk of electrical shock. Hence, GFCI protection is the essential safety measure for this type of installation.