Journeyman Electrician Practice Exam

When a raceway is run through a wall from the interior to the exterior of a building, what must be done?

1. It must be left open.

2. It should be painted for protection.

3. It must be sealed with an approved material.

4. It should be marked for identification.

The correct answer is: It must be sealed with an approved material.

When a raceway is installed through a wall from the interior to the exterior of a building, it is essential to seal it with an approved material to prevent moisture, pests, and other environmental issues from entering the building. Sealing the raceway ensures that it maintains its integrity and provides necessary protection against potential infiltration that could harm the electrical installations or safety of the building. This sealing also serves to comply with building codes and standards that govern electrical installations, ensuring that the system is safe and effective. Leaving the raceway open can pose a risk of water entry, which could lead to electrical faults and create a hazardous situation. Painting for protection, while beneficial for other materials, does not address the specific sealing requirements necessary in this instance. Marking for identification is important for safety and future maintenance but does not address the physical need to seal the raceway as it passes through the wall. Therefore, sealing the raceway with an approved material is the required action to ensure compliance and safety.