When is it necessary to use a junction box in conduit systems?

Using a junction box in conduit systems is essential for several reasons, particularly when splicing wires or connecting multiple cables. A junction box provides a safe and accessible location for these connections, which helps to contain wires and connections securely. This prevents exposed conductors, reduces the risk of electrical shorts, and protects the connections from physical damage and environmental factors.

The box also allows for easy access if future maintenance or inspection is needed, ensuring that any splicing or connections can be checked without disrupting the entire conduit system. This is critical for meeting safety standards and electrical codes, which require that all splices are made within an approved enclosure.

While changing the direction of conduit runs is a common practice and involves fittings, it does not inherently require a junction box unless connections are being made. Similarly, direct wire connections don't necessarily need a junction box unless splicing occurs. Additionally, addressing voltage drop involves considerations related to wire size and length, but does not specifically involve junction boxes. Thus, creating connections and splices within a designated enclosure is the primary reason for needing a junction box in these systems.