How does the NEC define a "temporary wiring installation"?

The National Electrical Code (NEC) defines a "temporary wiring installation" as installations that are made for a limited duration. This definition emphasizes the transient nature of such wiring, which is often used in situations like construction sites, exhibitions, or special events, where permanent wiring is not yet appropriate or necessary.

Temporary installations are typically designed to be easily set up and removed, accommodating the specific needs of a project without the permanence of standard wiring systems. The context of these installations addresses safety and compliance, ensuring that despite their temporary nature, they adhere to certain standards to mitigate risks associated with electrical hazards.

The other options do not align with the NEC's definition; for instance, installations intended for long-term use or those requiring specialized equipment would not qualify as temporary. Similarly, while temporary wiring might sometimes be underground, this characteristic does not define its temporary status. Overall, the distinction lies in the limited duration intended for the installation, which is key to understanding its classification under the NEC.