When should a junction box be utilized in conduit installations?

A junction box should be utilized in conduit installations primarily when making wire connections or for maintenance access. This is essential because junction boxes provide a safe and accessible location for connecting electrical wires, which is crucial for both the integrity of the electrical system and the safety of anyone who may work on it in the future.

These boxes function as a protective enclosure that houses electrical connections, thereby safeguarding the connections from environmental damage and reducing the risk of electrical shorts or other hazards. Additionally, they allow for easy access to the connections for future maintenance or troubleshooting, ensuring that electricians can easily reach the wiring without having to dismantle extensive sections of the conduit. This improves safety and efficiency in any electrical work.

The other options do not address the primary purpose of junction boxes in the context of conduit installations. For example, junction boxes are important regardless of the voltage of the system; they are not exclusively meant for high voltage. Additionally, while preventing conduit damage can be a secondary benefit, it is not the primary reason for using a junction box. Lastly, junction boxes are compatible with various types of conduits, not just non-metallic ones, which makes the statement about their exclusive usage incorrect.